Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 33,453	$ 56,301	$ 58,444	$ 70,304
Effective income tax rates	19.30%	17.40%	15.20%	17.20%
Discrete tax benefits from recognition of excess tax benefits	$ 600	$ 800	$ 14,300	$ 5,800
Reversal of uncertain tax positions	500	$ 500	1,500	$ 1,500
Unrecognized tax benefits	170,200		170,200		$ 160,300
Accrued interest and penalties related to uncertain tax positions	5,500		5,500		4,900
Expected decrease in uncertain tax positions	4,900		4,900
Non-current income tax payable
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits	$ 67,700		$ 67,700		$ 59,200