Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Aug. 10, 2018
Entity Registrant Name	Gores Holdings II, Inc.
Entity Central Index Key	0001682745
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Class A
Entity Common Stock, Shares Outstanding		40,000,000
Class F
Entity Common Stock, Shares Outstanding		10,000,000

BALANCE SHEET - USD ($)	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 168,794	$ 826,201
Prepaid assets and deferred offering costs	263,841	135,581
Total current assets	432,635	961,782
Investments and cash held in Trust Account	404,611,945	402,735,815
Total assets	405,044,580	403,697,597
Current liabilities:
Accrued expenses, formation and offering costs	3,077,932	66,191
State franchise tax accrual	20,000	131,928
Total current liabilities	3,097,932	198,119
Deferred underwriting compensation	14,000,000	14,000,000
Income tax payable		806,445
Net deferred income tax	4,480	4,481
Total liabilities	17,102,412	15,009,045
Temporary Equity [Abstract]
Class A subject to possible redemption 38,294,216 and 38,368,855 shares at June 30, 2018 and December 31, 2017, respectively (at redemption value of $10.00 per share)	382,942,160	383,688,550
Stockholders’ equity:
Additional paid-in-capital	4,361,675	3,615,292
Retained earnings	637,162	1,383,547
Total stockholders’ equity	5,000,008	5,000,002
Total liabilities and stockholders’ equity	405,044,580	403,697,597
Class A
Stockholders’ equity:
Common stock	171	163
Class F
Stockholders’ equity:
Common stock	$ 1,000	$ 1,000

BALANCE SHEET (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	220,000,000
Class A
Shares subject to possible redemption, issued	38,294,216	38,368,855
Redemption value per share	$ 10	$ 10
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	1,705,784	1,631,145
Common stock, shares outstanding	1,705,784	1,631,145
Class F
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	10,000,000	10,000,000
Common stock, shares outstanding	10,000,000	10,000,000

STATEMENT OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
STATEMENT OF OPERATIONS - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Professional fees and other expenses	$ (3,410,899)	$ (140,899)	$ (3,625,443)	$ (280,870)
State franchise taxes, other than income tax	(50,000)	(45,000)	(100,000)	(90,000)
Net loss from operations	(3,460,899)	(185,899)	(3,725,443)	(370,870)
Other income - interest income	1,668,661	727,843	2,997,552	1,064,410
Net income (loss) before income taxes	(1,792,238)	541,944	(727,891)	693,540
Provision for income tax	243,949		(18,494)
Net income (loss) attributable to common shares	(1,548,289)	$ 541,944	(746,385)	$ 693,540
Class A
Net income (loss) attributable to common shares	$ (905,293)		$ 1,595
Net Income (Loss) per ordinary share:
Basic and diluted	$ (0.02)	$ 0.01	$ 0.00	$ 0.02
Class F
Net income (loss) attributable to common shares	$ (642,996)		$ (747,980)
Net Income (Loss) per ordinary share:
Basic and diluted	$ (0.06)	$ 0.00	$ (0.07)	$ (0.01)

STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - 6 months ended Jun. 30, 2018 - USD ($)	Class A Ordinary Shares	Class F Ordinary Shares	Additional Paid-in Capital	Retained Earnings	Total
Beginning Balance (in shares) at Dec. 31, 2017	1,631,145	10,000,000
Beginning Balance at Dec. 31, 2017	$ 163	$ 1,000	$ 3,615,292	$ 1,383,547	$ 5,000,002
Change in proceeds subject to possible redemption (in shares)	74,639
Change in proceeds subject to possible redemption	$ 8		746,383		746,391
Net income				(746,385)	(746,385)
Ending Balance (in shares) at Jun. 30, 2018	1,705,784	10,000,000
Ending Balance at Jun. 30, 2018	$ 171	$ 1,000	$ 4,361,675	$ 637,162	$ 5,000,008

STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - shares	Jun. 30, 2018	Dec. 31, 2017
Class A
Number of shares subject to possible redemption	38,294,216	38,368,855

STATEMENT OF CASH FLOWS - USD ($)	6 Months Ended
STATEMENT OF CASH FLOWS - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ (746,385)	$ 693,540
Changes in receivable - related party		436
Changes in state franchise tax accrual	(111,928)	20,488
Changes in prepaid assets	(128,259)	(254,952)
Changes in deferred offering costs		414,606
Changes in income taxes payable	(806,446)
Changes in accrued expenses, formation and offering costs	3,011,741	138,074
Net cash provided by operating activities	1,218,723	1,012,192
Cash flows from investing activities
Cash deposited in Trust Account		(400,000,000)
Interest reinvested in Trust Account	(1,876,130)	(1,061,237)
Net cash used in investing activities	(1,876,130)	(401,061,237)
Cash flows from financing activities:
Proceeds from sale of Units in initial public offering		400,000,000
Proceeds from sale of Private Placement Warrants to Sponsor		10,000,000
Repayment of notes and advances payable - related party		(150,000)
Payment of underwriters' discounts and commissions		(8,000,000)
Payment of accrued offering costs		(721,646)
Net cash provided by financing activities		401,128,354
Increase (decrease) in cash	(657,407)	1,079,309
Cash at beginning of period	826,201	3,185
Cash at end of period	168,794	1,082,494
Supplemental disclosure of non-cash financing activities:
Deferred underwriting compensation.		14,000,000
Offering costs included in accrued expenses		$ 380,670
Cash paid for income and state franchise taxes	$ 211,928

Organization and Business Operations	6 Months Ended
Organization and Business Operations	Jun. 30, 2018
Organization and Business Operations
Organization and Business Operations	1. Organization and Business Operations Organization and General Gores Holdings II, Inc. (the “Company”) was incorporated in Delaware on August 15, 2016. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar Business Combination with one or more businesses (the “Business Combination”). The Company has neither engaged in any operations nor generated any operating revenue to date. The Company’s management has broad discretion with respect to the Business Combination. The Company’s Sponsor is Gores Sponsor II, LLC, a Delaware limited liability company (the “Sponsor”). The Company has selected December 31st as its fiscal year-end. At June 30, 2018, the Company had not commenced any operations. All activity for the period from August 15, 2016 (inception) through June 30, 2018 relates to the Company’s formation and initial public offering (“Public Offering”) described below. The Company completed the Public Offering on January 19, 2017 (the “IPO Closing Date”). The Company will not generate any operating revenues until after the completion of its Business Combination, at the earliest. Subsequent to the Public Offering, the Company will generate non-operating income in the form of interest income on cash and cash equivalents from the proceeds derived from the Public Offering and the sale of the Private Placement Warrants (as defined below) held in the Trust Account (as defined below). Proposed Verra Mobility Business Combination On June 21, 2018, the Company, AM Merger Sub I, Inc., a Delaware corporation and a direct, wholly-owned subsidiary of the Company (“First Merger Sub”), AM Merger Sub II, LLC, a Delaware limited liability company and a direct, wholly-owned subsidiary of the Company (“Second Merger Sub”), Greenlight Holding II Corporation (“Greenlight”) and PE Greenlight Holdings, LLC (the “Platinum Stockholder” or, in its capacity as the Stockholder Representative, the “Stockholder Representative”) entered into an Agreement and Plan of Merger Agreement (as it may be amended from time to time, the “Merger Agreement”), which provides for, among other things, (i) the merger of First Merger Sub with and into Greenlight, with Greenlight continuing as the surviving corporation (the “First Merger”) and (ii) immediately following the First Merger and as part of the same overall transaction as the First Merger, the merger of Greenlight with and into Second Merger Sub with Second Merger Sub continuing as the surviving entity (the “Second Merger” and, together with the First Merger, the “Mergers” and, together with the other transactions contemplated by the Merger Agreement, the “Proposed Business Combination”). As a result of the First Merger, the Company will own 100% of the outstanding common stock of Greenlight and each share of common stock of Greenlight will be cancelled and converted into the right to receive a portion of the consideration. As a result of the Second Merger, the Company will own 100% of the outstanding interests in the Second Merger Sub. Following the closing of the Proposed Business Combination, the Company will own, directly or indirectly, all the stock of Greenlight and its subsidiaries and the stockholders of Greenlight as of immediately prior to the effective time of the First Merger (the “Greenlight Stockholders”) will hold a portion of the Company's Class A common stock. The Merger Agreement The consideration to be paid to the Greenlight Stockholders will be a combination of cash and stock, as calculated pursuant to the terms of the Merger Agreement and certain other transaction documents contemplated thereby. Pursuant to the Merger Agreement, the aggregate consideration payable to the Greenlight Stockholders will consist of (i) an amount in cash equal to the Closing Cash Payment Amount (as defined in the Merger Agreement), and (ii) shares of newly-issued Class A common stock equal to the Closing Number of Securities (as defined in the Merger Agreement). The merger consideration payable to the Greenlight Stockholders is also subject to adjustment based on Greenlight’s working capital, cash and indebtedness as of the closing date, among other adjustments contemplated by the Merger Agreement. Based upon assumed net indebtedness of approximately $852 million (after giving effect to the partial repayment of existing indebtedness), the aggregate merger consideration to be paid by the Company is expected to be approximately $2.3 billion. In addition to the consideration to be paid at the closing of the transaction contemplated by the Merger Agreement, certain of the Greenlight Stockholders will be entitled to receive additional earn-out payments from the Company of up to an aggregate of 10 million shares of Class A common stock, if the price of Class A common stock trading on the Nasdaq exceeds certain thresholds during the five-year period following the closing of the Mergers. Consummation of the Transactions contemplated by the Merger Agreement is subject to customary closing conditions as well as specified cash availability conditions. The Merger Agreement also contains customary representations and warranties and may be terminated by the parties thereto as specified therein. In order to facilitate the Proposed Business Combination, the Sponsor has agreed to the cancellation of 3,478,261 of its Founder Shares and the Company has agreed to the purchase of shares of Class A common stock by the participants in the Private Placement (as defined below) (pursuant to the subscription agreements entered into in connection therewith) at a discounted price of $9.20. Private Placement Subscription Agreements On June 21, 2018, the Company entered into subscription agreements with certain investors, including the Sponsor, pursuant to which the investors have agreed to purchase in the aggregate 43,478,261 shares of Class A common stock in a private placement for $9.20 per share (the “Private Placement”). The anticipated gross proceeds from the Private Placement of approximately $400,000,000 will be used to partially fund the cash consideration to be paid to the Greenlight Stockholders. The Private Placement is conditioned on, among other things, the closing of the Proposed Business Combination. Tax Receivable Agreement At the closing of the Proposed Business Combination, the Company will enter into a Tax Receivable Agreement with the the Platinum Stockholder and the Stockholder Representative. The Tax Receivable Agreement will generally provide for the payment by the Company to the Platinum Stockholder of 50% of the net cash savings, if any, in U.S. federal, state and local income tax that the Company actually realizes (or is deemed to realize in certain circumstances) in periods after the closing of the Proposed Business Combination, as a result of the increase in tax basis of the intangible assets of Highway Toll Administration LLC (“HTA”) resulting from the acquisition of HTA by Verra Mobility Corporation prior to the Proposed Business Combination. The Company generally will retain benefit of the remaining 50% of these cash savings. Financing Upon the IPO Closing Date and the sale of the Private Placement Warrants, an aggregate of $400,000,000 was placed in a Trust Account with Continental Stock Transfer & Trust Company acting as trustee (the “Trust Account”). Trust Account Funds held in the Trust Account can be invested only in U.S. government treasury bills with a maturity of one hundred and eighty (180) days or less or in money market funds meeting certain conditions under Rule 2a‑7 under the Investment Company Act of 1940, as amended, that invest only in direct U.S. government obligations. As of June 30, 2018, the Trust Account consisted of cash and treasury bills compliant with Rule 2a‑7. The Company’s amended and restated certificate of incorporation provides that, other than the withdrawal of interest to pay income taxes, if any, none of the funds held in trust will be released until the earliest of: (i) the completion of the Business Combination; or (ii) the redemption of any public shares of common stock properly tendered in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation to modify the substance or timing of the Company’s obligation to redeem 100% of such public shares of common stock if the Company does not complete the Business Combination within 24 months from the IPO Closing Date; or (iii) the redemption of 100% of the public shares of common stock if the Company is unable to complete a Business Combination within 24 months from the IPO Closing Date, subject to the requirements of law and stock exchange rules. Business Combination The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Public Offering, although substantially all of the net proceeds of the Public Offering are intended to be generally applied toward consummating a Business Combination. The Business Combination must be with one or more target businesses that together have an aggregate fair market value of at least 80% of the assets held in the Trust Account (less any deferred underwriting commissions and taxes payable on interest income earned) at the time of the Company signing a definitive agreement in connection with the Business Combination. Furthermore, there is no assurance that the Company will be able to successfully effect a Business Combination, including the Proposed Business Combination. The Company, after signing a definitive agreement for a Business Combination, is required to either (i) seek stockholder approval of the Business Combination at a meeting called for such purpose in connection with which stockholders may seek to redeem their shares, regardless of whether they vote for or against the Business Combination, for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Business Combination, including interest income but less taxes payable, or (ii) provide stockholders with the opportunity to sell their shares to the Company by means of a tender offer (and thereby avoid the need for a stockholder vote) for an amount in cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Business Combination, including interest income but less taxes payable. The decision as to whether the Company will seek stockholder approval of the Business Combination or will allow stockholders to sell their shares in a tender offer will be made by the Company, solely in its discretion, and will be based on a variety of factors such as the timing of the transaction and whether the terms of the transaction would otherwise require the Company to seek stockholder approval, unless a vote is required by law or under NASDAQ rules. If the Company seeks stockholder approval, it will complete its Business Combination only if a majority of the outstanding shares of common stock voted are voted in favor of the Business Combination. Currently, the Company will not redeem its public shares of common stock in an amount that would cause its net tangible assets to be less than $5,000,001. In such case, the Company would not proceed with the redemption of its public shares of common stock and the related Business Combination, and instead may search for an alternate Business Combination. For business and other reasons, the Company has elected to provide its stockholders with the opportunity to have their public shares redeemed in connection with a stockholder vote to approve the Proposed Business Combination rather than a tender offer. As a result of the foregoing redemption provisions, the public shares of common stock will be recorded at the redemption amount and classified as temporary equity, in accordance with ASC 480, “Distinguishing Liabilities from Equity” (“ASC 480”) in subsequent periods. The Company will have 24 months from the IPO Closing Date to complete its Business Combination. If the Company does not complete a Business Combination within this period of time, it shall (i) cease all operations except for the purposes of winding up; (ii) as promptly as reasonably possible, but not more than ten business days thereafter, redeem the public shares of common stock for a per share pro rata portion of the Trust Account, including interest income, but less taxes payable (less up to $100,000 of such net interest income to pay dissolution expenses) and (iii) as promptly as possible following such redemption, dissolve and liquidate the balance of the Company’s net assets to its remaining stockholders, as part of its plan of dissolution and liquidation. The Sponsor and the Company’s officers and directors have entered into a letter agreement with the Company, pursuant to which they waived their rights to participate in any redemption with respect to their Founder Shares (as defined below); however, if the Sponsor or any of the Company’s officers, directors or affiliates acquire public shares of common stock, they will be entitled to a pro rata share of the Trust Account in the event the Company does not complete a Business Combination within the required time period. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be less than the initial public offering price per Unit in the Public Offering. Emerging Growth Company Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard.

Significant Accounting Policies

6 Months Ended

Jun. 30, 2018

Significant Accounting Policies

Significant Accounting Policies

2. Significant Accounting Policies

Basis of Presentation

The accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the accounting and disclosure rules and regulations of the Securities and Exchange Commission (“SEC”), and reflect all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the financial position as of June 30, 2018 and the results of operations and cash flows for the period presented. Operating results for the six months ended June 30, 2018 are not necessarily indicative of results that may be expected for the full year or any other period. The accompanying unaudited financial statements should be read in conjunction with the audited financial statements included in the Company’s Annual Report on Form 10‑K filed with the SEC on March 14, 2018.

Net Income/(Loss) Per Common Share

The Company has two classes of shares, which are referred to as Class A common stock and Class F common stocks. Net income/(loss) per common share is computed utilizing the two-class method. The two-class method is an earnings allocation formula that determines earnings per share separately for each class of common stock based on an allocation of undistributed earnings per the rights of each class. At June 30, 2018, the Company did not have any dilutive securities or other contracts that could, potentially, be exercised or converted into common stock and then share in the earnings of the Company under the treasury stock method. As a result, diluted net income/(loss) per common share is the same as basic net income/(loss) per common share for the period. The table below presents a reconciliation of the numerator and denominator used to compute basic and diluted net income/(loss) per share for each class of common stock:


	For the Three Months Ended June 30, 2018				For the Six Months Ended June 30, 2018
	Class A		Class F		Class A		Class F
Basic and diluted net income/(loss) per share:
Numerator:
Allocation of net income/(loss)	$	(905,293)	$	(642,996)	$	1,595	$	(747,980)

Denominator:
Weighted-average shares outstanding		40,000,000		10,000,000		40,000,000		10,000,000
Basic and diluted net income/(loss) per share	$	(0.02)	$	(0.06)	$	0.00	$	(0.07)

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution and the Trust Account, which at times, may exceed the Federal depository insurance coverage of $250,000. The Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.

Financial Instruments

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the balance sheet.

Offering Costs

The Company complies with the requirements of the ASC 340‑10‑S99‑1 and SEC Staff Accounting Bulletin (SAB) Topic 5A — “Expenses of Offering.” Offering costs consist principally of professional and registration fees incurred through the IPO Closing Date that were related to the Public Offering, totaling approximately $22,719,995, (including $22,000,000 in underwriter’s fees), were charged to stockholders’ equity upon completion of our Public Offering.

Redeemable Common Stock

As discussed in Note 3, all of the 40,000,000 shares of class A common stock sold as part of the Units in the Public Offering contain a redemption feature which allows for the redemption of such public shares in connection with the Company’s liquidation, if there is a stockholder vote or tender offer in connection with the Business Combination and in connection with certain amendments to the Company’s charter. In accordance with ASC 480, redemption provisions not solely within the control of the Company require common stock subject to redemption to be classified outside of permanent equity. Ordinary liquidation events, which involve the redemption and liquidation of all of the entity’s equity instruments, are excluded from the provisions of ASC 480. Although the Company did not specify a maximum redemption threshold, its charter provides that currently, the Company will not redeem its public shares in an amount that would cause its net tangible assets (stockholders’ equity) to be less than $5,000,001.

The Company recognizes changes in redemption value immediately as they occur and adjusts the carrying value of redeemable common stock to equal the redemption value at the end of each reporting period. Increases or decreases in the carrying amount of redeemable common stock are affected by charges against additional paid in capital.

Accordingly, at June 30, 2018, 38,294,216 of the 40,000,000 public shares are classified outside of permanent equity at their redemption value.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Income Taxes

The Company follows the asset and liability method of accounting for income taxes under ASC 740, “Income Taxes.” Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

The Company accounts for uncertainty in income taxes by recognizing the tax benefit from an uncertain tax position only if it is more than likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The Company measures the tax benefits recognized in the financial statements from such a position based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The application of income tax law is inherently complex. Laws and regulations in this area are voluminous and are often ambiguous. As such, the Company is required to make many subjective assumptions and judgments regarding income tax exposures. Interpretations of and guidance surrounding income tax law and regulations change over time and may result in changes to the Company's subjective assumptions and judgments, which can materially affect amounts recognized in the balance sheets and statements of income and comprehensive income. The Company recognizes accrued interest and penalties related to unrecognized tax liabilities as income tax expense. The Company incurred $18,494 for the payment of interest and penalties through June 30, 2018.

The Company may be subject to potential examination by U.S. federal, states or foreign jurisdiction authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income amounts in various tax jurisdictions and compliance with U.S. federal, states or foreign tax laws.

The Company is incorporated in the State of Delaware and is required to pay franchise taxes to the State of Delaware on an annual basis.

Cash and Cash Equivalents

The Company considers all highly liquid instruments purchased with an original maturity of six months or less to be cash equivalents. The Company continually monitors its positions with and the credit quality of the financial institutions with which it invests. As of the balance sheet date, and periodically throughout the year, the Company has maintained balances in various operating accounts in excess of federally insured limits.

Investments and Cash Held in Trust Account

At June 30, 2018, the Company had $404,611,945 in the Trust Account which may be utilized for Business Combinations. At June 30, 2018, the Trust Account consisted of both cash and treasury bills.

The Company’s amended and restated certificate of incorporation provides that, other than the withdrawal of interest to pay taxes, if any, none of the funds held in trust will be released until the earlier of: (i) the completion of the Business Combination; (ii) the redemption of any public shares of common stock properly tendered in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation to modify the substance or timing of the Company’s obligation to redeem 100% of such public shares of common stock if the Company does not complete the Business Combination within 24 months from the IPO Closing Date; or (iii) the redemption of 100% of the public shares of common stock if the Company is unable to complete a Business Combination within 24 months from the IPO Closing Date, subject to the requirements of law and stock exchange rules.

Going Concern Consideration

If the Company does not complete its Business Combination by January 19, 2019, the Company will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem 100% of the common stock sold as part of the units in the Public Offering, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest (which interest shall be net of franchise and income taxes payable and less up to $100,000 of such net interest which may be distributed to the Company to pay dissolution expenses), divided by the number of then outstanding public shares, which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidation distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s Board of Directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law.

In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be less than the initial public offering price per unit in the Public Offering. In addition if the Company fails to complete its Business Combination by January 19, 2019, there will be no redemption rights or liquidating distributions with respect to the warrants, which will expire worthless.

In addition, at June 30, 2018 and December 31, 2017, the Company had current liabilities of $3,097,932 and $198,119, respectively, largely due to amounts owed to professionals, consultants, advisors and others who are working on seeking a Business Combination as described in Note 1. Such work is continuing after June 30, 2018 and amounts are continuing to accrue. On June 30, 2018 and December 31, 2017, the Company had working capital of ($2,665,297) and $763,663, respectively. Additionally, interest earned on the funds held in the Trust Account may be released to the Company to fund its Regulatory Withdrawals (subject to an annual limit of $750,000, for a maximum of 24 months) and/or to pay its franchise and income taxes.

Public Offering	6 Months Ended
Public Offering	Jun. 30, 2018
Public Offering
Public Offering	3. Public Offering Public Units On January 19, 2017, the Company sold 40,000,000 units at a price of $10.00 per unit (the “Units”), including 2,500,000 Units as a result of the underwriter’s partial exercise of its over-allotment option, generating gross proceeds of $400,000,000. Each Unit consists of one share of the Company’s Class A common stock, $0.0001 par value, and one-third of one redeemable Class A common stock purchase warrant (the “Warrants”). Each whole warrant entitles the holder to purchase one share of Class A common stock for $11.50 per share. Each Warrant will become exercisable on the later of 30 days after the completion of the Business Combination or 12 months from the IPO Closing Date and will expire five years after the completion of the Business Combination or earlier upon redemption or liquidation. However, if the Company does not complete the Business Combination on or prior to the 24-month period allotted to complete the Business Combination, the Warrants will expire at the end of such period. The Warrants were issued in registered form under a warrant agreement between Continental Stock Transfer & Trust Company, as warrant agent, and the Company. The Company did not register the shares of common stock issuable upon exercise of the Warrants under the Securities Act of 1933, as amended (the “Securities Act”) or any state securities law. Under the terms of the warrant agreement, the Company has agreed to use its best efforts to file a registration statement under the Securities Act following the completion of the Business Combination covering the shares of common stock issuable upon exercise of the Warrants. The Company paid an upfront underwriting discount of 2.00% ($8,000,000) of the per Unit offering price to the underwriter at the IPO Closing Date, with an additional fee (the “Deferred Discount”) of 3.50% of the per Unit offering price payable upon the Company’s completion of a Business Combination. The Deferred Discount will become payable to the underwriter from the amounts held in the Trust Account solely in the event the Company completes a Business Combination.

Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2018
Related Party Transactions
Related Party Transactions	4. Related Party Transactions Founder Shares On August 19, 2016, the Sponsor purchased 10,781,250 shares of the Company’s Class F common stock (the “Founder Shares”) for an aggregate purchase price of $25,000, or approximately $0.002 per share. Subsequently, the Sponsor transferred an aggregate of 75,000 Founder Shares to the Company’s independent directors (together with the Sponsor, the “Initial Stockholders”). On February 27, 2017, the Sponsor forfeited 781,250 Founder Shares following the expiration of the unexercised portion of underwriter’s over-allotment option, so that the Founder Shares held by the Initial Stockholders would represent 20.0% of the outstanding shares of common stock following completion of the Public Offering. The Founder Shares are identical to the common stock included in the Units sold in the Public Offering except that the Founder Shares will automatically convert into shares of Class A common stock at the time of the Business Combination on a one-for-one basis, subject to adjustment as described in the Company’s amended and restated certificate of incorporation. Private Placement Warrants The Sponsor purchased from the Company an aggregate of 6,666,666 warrants at a price of $1.50 per warrant (a purchase price of $10,000,000) in a private placement that occurred simultaneously with the Public Offering (the “Private Placement Warrants”). Each Private Placement Warrant entitles the holder to purchase one share of Class A common stock at $11.50 per share. A portion of the purchase price of the Private Placement Warrants was added to the proceeds from the Public Offering to be held in the Trust Account pending completion of the Business Combination. The Private Placement Warrants have terms and provisions that are identical to those of the Warrants sold as part of the Units in the Public Offering, except that the Private Placement Warrants may be net cash settled and are not redeemable so long as they are held by the Sponsor or its permitted transferees. If the Company does not complete a Business Combination, then the Private Placement Warrants proceeds will be part of the liquidation distribution to the public stockholders and the Private Placement Warrants will expire worthless. Registration Rights The holders of Founder Shares, Private Placement Warrants and warrants issued upon conversion of working capital loans, if any, have registration rights (in the case of the Founder Shares, only after conversion of such shares to common shares) pursuant to a registration rights agreement entered into by the Company, the Sponsor and the other security holders named therein on January 12, 2017. These holders will also have certain demand and “piggy back” registration rights. The Company will bear the expenses incurred in connection with the filing of any such registration statements. Sponsor Loan On August 19, 2016, the Sponsor loaned the Company an aggregate of $150,000 by the issuance of an unsecured promissory note for $150,000 to cover expenses related to the Public Offering, and on January 11, 2017, the Sponsor loaned the Company an additional $150,000 by the issuance of a second unsecured promissory note for $150,000 to cover expenses related to the Public Offering (collectively, the “Notes”). These Notes were non-interest bearing and payable on the earlier of January 31, 2017 or the completion of the Public Offering. These Notes were repaid in full upon the completion of the Public Offering. Administrative Services Agreement The Company entered into an administrative services agreement on January 12, 2017, pursuant to which it agreed to pay to an affiliate of the Sponsor $20,000 a month for office space, utilities and secretarial support. Services commenced on the date the securities were first listed on the NASDAQ Capital Market and will terminate upon the earlier of the consummation by the Company of a Business Combination or the liquidation of the Company. For the period commencing January 12, 2017 through June 30, 2018 the Company has paid the affiliate $352,258.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Taxes
Income Taxes	6. Income Taxes Income tax expense during interim periods is based on applying an estimated annual effective income tax rate to year-to-date income, plus any significant unusual or infrequently occurring items which are recorded in the interim period. The Company’s effective tax rate is estimated at 24.66%. The provision for income taxes for the six months ended June 30, 2018 differs from the amount that would be provided by applying the statutory U.S. federal income tax rate of 21% to pre-tax income primarily because of state income taxes. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in various jurisdictions, permanent and temporary differences, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur, more experience is obtained, additional information becomes known or as the tax environment changes. The Company has evaluated tax positions taken or expected to be taken in the course of preparing the financial statements to determine if the tax positions are “more likely than not” of being sustained by the applicable tax authority. Tax positions not deemed to meet the “more likely than not” threshold would be recorded as a tax benefit or expense in the current year. The Company has concluded that there was no impact related to uncertain tax positions on the results of its operations for the period ended June 30, 2018. At June 30, 2018, the Company has no accrued interest or penalties related to uncertain tax positions. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position. The Company’s conclusions regarding tax positions will be subject to review and may be adjusted at a later date based on factors including, but not limited to, ongoing analyses of tax laws, regulations, and interpretations thereof.

Investments and cash held in Trust	6 Months Ended
Investments and cash held in Trust	Jun. 30, 2018
Investments and cash held in Trust
Investments and cash held in Trust	7. Investments and cash held in Trust At June 30, 2018, investment securities in the Company’s Trust Account consist of $404,609,948 in United States Treasury Bills and $1,997 in cash. The Company classifies its United States Treasury and equivalent securities as held-to-maturity in accordance with FASB ASC 320, “Investments - Debt and Equity Securities.” Held-to-maturity securities are those securities which the Company has the ability and intent to hold until maturity. Held-to-maturity treasury securities are recorded at amortized cost on the accompanying balance sheet and adjusted for the amortization or accretion of premiums or discounts.

Fair Value Measurement

6 Months Ended

Jun. 30, 2018

Fair Value Measurement

Fair Value Measurement

8. Fair Value Measurement

The Company complies with FASB ASC 820, Fair Value Measurements, for its financial assets and liabilities that are re-measured and reported at fair value at each reporting period, and non-financial assets and liabilities that are re-measured and reported at fair value at least annually. ASC 820 determines fair value to be the price that would be received to sell an asset or would be paid to transfer a liability (i.e., the exit price) in an orderly transaction between market participants at the measurement date.

The following table presents information about the Company’s assets that are measured at fair value on a recurring basis at June 30, 2018, and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value. In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair values determined by Level 2 inputs utilize data points that are observable such as quoted prices, interest rates and yield curves. Fair values determined by Level 3 inputs are unobservable data points for the asset or liability, and includes situations where there is little, if any, market activity for the asset or liability:


					Significant		Significant
					Other		Other
			Quoted Prices in		Observable		Unobservable
	June 30,		Active Markets		Inputs		Inputs
Description	2018		(Level 1)		(Level 2)		(Level 3)
Investments and cash held in Trust Account		404,611,945		404,611,945		—		—
Total	$	404,611,945	$	404,611,945	$	—	$	—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Stockholders’ Equity	6 Months Ended
Stockholders’ Equity	Jun. 30, 2018
Stockholders’ Equity.
Stockholders’ Equity	9. Stockholders’ Equity Common Stock The Company is authorized to issue 220,000,000 shares of common stock, consisting of 200,000,000 shares of Class A common stock, par value $0.0001 per share and 20,000,000 shares of Class F common stock, par value $0.0001 per share. Holders of the Company’s common stock are entitled to one vote for each share of common stock and vote together as a single class. At June 30, 2018, there were 40,000,000 shares of Class A common stock (inclusive of the 38,294,216 shares subject to redemption) and 10,000,000 shares of Class F common stock issued and outstanding. Preferred Stock The Company is authorized to issue 1,000,000 shares of preferred stock, par value $0.0001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by the Board of Directors. At June 30, 2018, there were no shares of preferred stock issued and outstanding.

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	10. Subsequent Events Management has performed an evaluation of subsequent events through the date of issuance of the financial statements, noting no items which require adjustment or disclosure other than those set forth in the preceding notes to the financial statements.

Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2018

Significant Accounting Policies

Basis of Presentation

Net Loss Per Common Share

Net Income/(Loss) Per Common Share


	For the Three Months Ended June 30, 2018				For the Six Months Ended June 30, 2018
	Class A		Class F		Class A		Class F
Basic and diluted net income/(loss) per share:
Numerator:
Allocation of net income/(loss)	$	(905,293)	$	(642,996)	$	1,595	$	(747,980)

Denominator:
Weighted-average shares outstanding		40,000,000		10,000,000		40,000,000		10,000,000
Basic and diluted net income/(loss) per share	$	(0.02)	$	(0.06)	$	0.00	$	(0.07)

Concentration of Credit Risk

Financial Instruments

Offering Costs

Redeemable Common Stock

Accordingly, at June 30, 2018, 38,294,216 of the 40,000,000 public shares are classified outside of permanent equity at their redemption value.

Use of Estimates

Income Taxes

The Company is incorporated in the State of Delaware and is required to pay franchise taxes to the State of Delaware on an annual basis.

Cash and Cash Equivalents

Investments and Cash Held in Trust Account

At June 30, 2018, the Company had $404,611,945 in the Trust Account which may be utilized for Business Combinations. At June 30, 2018, the Trust Account consisted of both cash and treasury bills.

Going Concern Consideration

Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Significant Accounting Policies

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	For the Three Months Ended June 30, 2018				For the Six Months Ended June 30, 2018
	Class A		Class F		Class A		Class F
Basic and diluted net income/(loss) per share:
Numerator:
Allocation of net income/(loss)	$	(905,293)	$	(642,996)	$	1,595	$	(747,980)

Denominator:
Weighted-average shares outstanding		40,000,000		10,000,000		40,000,000		10,000,000
Basic and diluted net income/(loss) per share	$	(0.02)	$	(0.06)	$	0.00	$	(0.07)

Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Measurement

Schedule of assets measured at fair value on a recurring basis


					Significant		Significant
					Other		Other
			Quoted Prices in		Observable		Unobservable
	June 30,		Active Markets		Inputs		Inputs
Description	2018		(Level 1)		(Level 2)		(Level 3)
Investments and cash held in Trust Account		404,611,945		404,611,945		—		—
Total	$	404,611,945	$	404,611,945	$	—	$	—

Organization and Business Operations - Agreements (Details) - Scenario, Plan [Member]	Jun. 21, 2018 USD ($) $ / shares shares
Verra Mobility Business Combination [Member]
Business Acquisition [Line Items]
Assumed net indebtedness \| $	$ 852,000,000
Aggregate merger consideration \| $	$ 2,300,000,000
Contingent consideration, maximum number of shares \| shares	10,000,000
Contingency period	5 years
Number of shares cancelled \| shares	3,478,261
Share price \| $ / shares	$ 9.20
Number of shares subscribed \| shares	43,478,261
Anticipated gross proceeds \| $	$ 400,000,000
Tax Receivable Agreement, portion of net cash savings paid out	50.00%
Tax Receivable Agreement, portion of net cash savings retained	50.00%
Greenlight [Member]
Business Acquisition [Line Items]
Ownership percentage	100.00%
Second Merger Sub [Member]
Business Acquisition [Line Items]
Ownership percentage	100.00%

Organization and Business Operations - Financing, etc. (Details) - USD ($)		6 Months Ended
	Jan. 19, 2017	Jun. 30, 2018	Jun. 30, 2017
Stockholders' Equity
Amount placed in trust account	$ 400,000,000		$ 400,000,000
Maximum maturity period (in days)		180 days
Redemption percentage for release of Trust Account funds		100.00%
Redemption percentage if business combination is not completed		100.00%
Number of days to seek shareholder approval for redemption of shares		2 days
Number of days to provide opportunity to shareholders to sell their shares		2 days
Dissolution expenses, maximum allowed		$ 100,000
Minimum
Stockholders' Equity
Percentage of fair market value		80.00%
Threshold net tangible assets		$ 5,000,001
Maximum
Stockholders' Equity
Number of months to complete Business Combination		24 months
Number of days to redeem the shares if Business combination is not completed		10 days

Significant Accounting Policies (Details)		3 Months Ended		6 Months Ended
Significant Accounting Policies (Details)	Jan. 19, 2017 USD ($)	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares	Jun. 30, 2018 USD ($) item $ / shares shares	Jun. 30, 2017 USD ($) $ / shares	Dec. 31, 2017 USD ($) shares
Net Loss per Common Share
Number of classes of shares \| item				2
Dilutive securities \| shares				0
Allocation of net income/(loss)		$ (1,548,289)	$ 541,944	$ (746,385)	$ 693,540
Income taxes
Interest and penalties on unrecognized tax benefits				18,494
Assets Held-in-trust [Abstract]
Investments and cash held in Trust Account		$ 404,611,945		$ 404,611,945		$ 402,735,815
Redemption percentage for release of Trust Account funds				100.00%
Redemption percentage if business combination is not completed		100.00%		100.00%
Business Combination, Description [Abstract]
Dissolution expenses, maximum allowed				$ 100,000
Current liabilities		$ 3,097,932		3,097,932		198,119
Working capital		2,665,297		2,665,297		$ 763,663
Regulatory Withdrawals, maximum that may be funded via Trust Account interest				$ 750,000
Maximum release period				24 months
Minimum
Net Loss per Common Share
Threshold net tangible assets				$ 5,000,001
Maximum
Assets Held-in-trust [Abstract]
Number of months to complete Business Combination				24 months
Business Combination, Description [Abstract]
Number of days to redeem the shares if Business combination is not completed				10 days
IPO
Net Loss per Common Share
Offering costs charged to stockholders' equity	$ 22,719,995
Underwriter's fees	$ 22,000,000
Class A
Net Loss per Common Share
Allocation of net income/(loss)		$ (905,293)		$ 1,595
Weighted average common shares outstanding, Basic & Diluted \| shares		40,000,000		40,000,000
Basic and diluted net income/(loss) per share \| $ / shares		$ (0.02)	$ 0.01	$ 0.00	$ 0.02
Shares subject to possible redemption, issued \| shares		38,294,216		38,294,216		38,368,855
Common stock, inclusive of shares subject to redemption, number of shares issued and outstanding \| shares		40,000,000		40,000,000
Common stock, shares outstanding \| shares		1,705,784		1,705,784		1,631,145
Class A \| IPO
Net Loss per Common Share
Sale of common stock (in shares) \| shares				40,000,000
Class F
Net Loss per Common Share
Allocation of net income/(loss)		$ (642,996)		$ (747,980)
Weighted average common shares outstanding, Basic & Diluted \| shares		10,000,000		10,000,000
Basic and diluted net income/(loss) per share \| $ / shares		$ (0.06)	$ 0.00	$ (0.07)	$ (0.01)
Common stock, shares outstanding \| shares		10,000,000		10,000,000		10,000,000

Public Offering - (Details) - USD ($)		6 Months Ended
Public Offering - (Details) - USD ($)	Jan. 19, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Stockholders' Equity
Units sold	40,000,000
Share Price	$ 10.00
Gross proceeds			$ 400,000,000
Upfront underwriting discount			$ 8,000,000
Percentage of deferred underwriting discount		3.50%
Class A
Stockholders' Equity
Common stock, par value (in dollars per share)		$ 0.0001		$ 0.0001
Number of shares that contribute each unit		1
Number of shares warrant may be converted		1
Warrants exercise price (in dollars per share)		$ 11.50
Warrant
Stockholders' Equity
Number of shares that contribute each unit		0.33
Warrant exercisable term if business combination is completed		30 days
Warrant exercisable term from the closing of public offer		12 months
Warrant expiration term		5 years
Number of months to complete Business Combination		24 months
IPO
Stockholders' Equity
Gross proceeds	$ 400,000,000
Upfront underwriting discount (as a percent)	2.00%
Upfront underwriting discount	$ 8,000,000
Percentage of deferred underwriting discount		3.50%
IPO \| Class A
Stockholders' Equity
Sale of common stock (in shares)		40,000,000
Over-Allotment Option
Stockholders' Equity
Units sold	2,500,000

Related Party Transactions - (Details)				6 Months Ended		18 Months Ended
Related Party Transactions - (Details)	Feb. 27, 2017 shares	Jan. 11, 2017 USD ($)	Aug. 19, 2016 USD ($) $ / shares shares	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) $ / shares shares	Jan. 19, 2017 $ / shares
Related Party Transaction [Line Items]
Share price (in dollars per share) \| $ / shares							$ 10.00
Proceeds from sale of Private Placement Warrants to Sponsor \| $					$ 10,000,000
Class A
Related Party Transaction [Line Items]
Number of shares warrant may be converted \| shares				1		1
Warrants exercise price (in dollars per share) \| $ / shares				$ 11.50		$ 11.50
IPO \| Class A
Related Party Transaction [Line Items]
Sale of common stock (in shares) \| shares				40,000,000
Founder Shares
Related Party Transaction [Line Items]
Outstanding shares of common stock held by the initial stockholders (as a percent)	20.00%
Founder Shares \| Class A
Related Party Transaction [Line Items]
Conversion ratio				1
Private Placement Warrants
Related Party Transaction [Line Items]
Warrants exercise price (in dollars per share) \| $ / shares				$ 11.50		$ 11.50
Private Placement Warrants \| Class A
Related Party Transaction [Line Items]
Number of shares warrant may be converted \| shares				1		1
Sponsor Loan
Related Party Transaction [Line Items]
Proceeds from Promissory Note to related party \| $		$ 150,000	$ 150,000
Transactions during the period \| $		$ 150,000	$ 150,000
Sponsor [Member] \| Founder Shares
Related Party Transaction [Line Items]
Number of shares forfeited \| shares	781,250
Sponsor [Member] \| Founder Shares \| Class F
Related Party Transaction [Line Items]
Sale of common stock (in shares) \| shares			10,781,250
Sale of common stock, value \| $			$ 25,000
Share price (in dollars per share) \| $ / shares			$ 0.002
Sponsor [Member] \| Private Placement Warrants
Related Party Transaction [Line Items]
Number of warrants sold \| shares			6,666,666
Warrants sold, price per warrant \| $ / shares			$ 1.50
Proceeds from sale of Private Placement Warrants to Sponsor \| $			$ 10,000,000
Sponsor [Member] \| Administrative Service Agreement
Related Party Transaction [Line Items]
Monthly charge for administrative services \| $				$ 20,000
Transactions during the period \| $						$ 352,258
Director \| Founder Shares
Related Party Transaction [Line Items]
Number of shares transferred \| shares			75,000

Deferred Underwriting Compensation - (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Deferred Underwriting Compensation.
Deferred underwriting discount payable if business combination is completed	$ 14,000,000	$ 14,000,000
Percentage of deferred underwriting discount	3.50%
Deferred underwriting discount if business combination not completed	$ 0

Income Taxes - Rate reconciliation (Details)	6 Months Ended
Income Taxes - Rate reconciliation (Details)	Jun. 30, 2018 USD ($)
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective tax rate	24.66%
Federal income tax rate	21.00%
Accrued interest and penalties related to unrecognized tax liabilities	$ 0

Investments and cash held in Trust - (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Investments and cash held in Trust Account	$ 404,611,945	$ 402,735,815
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Investments and cash held in Trust Account	404,609,948
Cash [Member]
Schedule of Investments [Line Items]
Investments and cash held in Trust Account	$ 1,997

Fair Value Measurement (Details)	Jun. 30, 2018 USD ($)
Quoted Prices in Active Markets (Level 1)
Measured at fair value on recurring basis
Investments and cash held in Trust Account	$ 404,611,945
Total	404,611,945
Recurring
Measured at fair value on recurring basis
Investments and cash held in Trust Account	404,611,945
Total	$ 404,611,945

Stockholders’ Equity - (Details)	Jun. 30, 2018 Vote $ / shares shares	Dec. 31, 2017 $ / shares shares
Common Stock
Common stock, shares authorized	220,000,000
Number of votes per share \| Vote	1
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, par value (in dollars per share) \| $ / shares	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A
Common Stock
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value (in dollars per share) \| $ / shares	$ 0.0001	$ 0.0001
Common stock, inclusive of shares subject to redemption, number of shares issued and outstanding	40,000,000
Common stock, shares issued	1,705,784	1,631,145
Common stock, shares outstanding	1,705,784	1,631,145
Number of shares subject to possible redemption	38,294,216	38,368,855
Class F
Common Stock
Common stock, shares authorized	20,000,000	20,000,000
Common stock, par value (in dollars per share) \| $ / shares	$ 0.0001	$ 0.0001
Common stock, shares issued	10,000,000	10,000,000
Common stock, shares outstanding	10,000,000	10,000,000

Deferred Underwriting Compensation	6 Months Ended
Deferred Underwriting Compensation	Jun. 30, 2018
Deferred Underwriting Compensation.
Deferred Underwriting Compensation	5. Deferred Underwriting Compensation The Company is committed to pay a deferred underwriting discount totaling $14,000,000 or 3.50% of the gross offering proceeds of the Public Offering, to the underwriter upon the Company’s consummation of a Business Combination. The underwriter is not entitled to any interest accrued on the Deferred Discount, and no Deferred Discount is payable to the underwriter if there is no Business Combination.