Leases and Other Commitments - Schedule of Supplemental Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Weighted-average remaining lease term in years	6 years	6 years 7 months 6 days
Weighted-average discount rate	3.10%	3.30%
Operating lease assets obtained in exchange for lease liabilities	$ 9,861	$ 71,097
Reductions to operating lease assets for reductions to lease liabilities	$ (12,051)	$ (7,055)