Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended		12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
Income Tax Disclosure [Line Items]
U.S. federal statutory rates	21.00%			21.00%		21.00%	21.00%
Effective income tax rate	35.80%			(109.90%)		(11.10%)	163.50%
Income tax expense (benefit)	$ 6,216	$ (9,415)	$ (2,211)	$ (6,707)	$ 2,769	$ (3,199)	$ (3,938)	$ (4,724)
Change in income tax expense (benefit)	12,900					700
Excess tax benefit related to stock-based compensation	$ 1,000					3,600
Netherlands
Income Tax Disclosure [Line Items]
Income tax expense (benefit)						$ (15,800)	$ (5,000)