Public Offering - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended
	Apr. 21, 2017	Apr. 04, 2017	Apr. 21, 2017	Mar. 31, 2018
IPO [Member]
Subsidiary, Sale of Stock [Line Items]
Number of units issued in public offering		35,000,000	37,732,112
Price per unit issued	$ 10.00		$ 10.00
Gross proceeds from sale of units			$ 377,321,120
Number of warrants included in each unit	0.3333		0.3333
Warrant expiration period from initial business combination			30 days
Warrant expiration period from public offering			12 months
Warrant expiration period			5 years
Warrant redemption price			$ 0.01
Notice period for warrant redemption			30 days
Warrant conversion stock price trigger			$ 18.00
Warrant conversion threshold trading days			20 days
Warrant conversion threshold consecutive trading days			30 days
Percentage of underwriting discount			2.00%
Underwriting discount			$ 7,546,422
Percentage of deferred discount	3.50%		3.50%
Deferred offering costs	$ 13,206,239		$ 13,206,239
IPO [Member] | Class A Common Stock [Member]
Subsidiary, Sale of Stock [Line Items]
Number of units issued in public offering				37,732,112
Number of common shares included in each unit	1		1
Number of shares of common stock converted from each warrant (in shares)	1		1
Warrant exercise price	$ 11.50		$ 11.50
Over-Allotment Units [Member]
Subsidiary, Sale of Stock [Line Items]
Number of units issued in public offering	2,732,112		2,732,112
Option exercise period			45 days
Over-Allotment Units [Member] | Maximum [Member]
Subsidiary, Sale of Stock [Line Items]
Underwriters' option to purchase units	5,250,000		5,250,000