Income Taxes - Schedule of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Current state and local									$ 204	$ 182	$ 0
Current non-U.S.									38	(55)	(63)
Total current									242	127	(63)
Deferred U.S. federal									(13,185)	(7,928)	0
Deferred state and local									(204)	(2,624)	0
Deferred non-U.S.									120	50	532
Total deferred									(13,269)	(10,502)	532
Total income tax provision / (benefit)	$ (15,125)	$ 1,061	$ 661	$ 376	$ (10,381)	$ 41	$ 72	$ (107)	$ (13,027)	$ (10,375)	$ 469