Stockholders' Equity - Additional Information (Details)	Sep. 30, 2019 Vote $ / shares shares	Dec. 31, 2018 $ / shares shares	Sep. 30, 2018 shares
Class Of Stock [Line Items]
Common stock, shares authorized	220,000,000
Number of votes for each share | Vote	1
Number of shares subject to possible redemption	38,714,829	38,398,161
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
Class Of Stock [Line Items]
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
Number of shares subject to possible redemption	38,714,829	38,398,161	38,241,399
Common stock, shares issued	1,285,171	1,601,839
Common stock, shares outstanding	1,285,171	1,601,839
Class F Common Stock
Class Of Stock [Line Items]
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