Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Costs and expenses:
Total share-based compensation	$ 5,223	$ 5,437	$ 11,635	$ 10,830
Income tax benefit	(1,151)	(1,305)	(2,733)	(2,569)
Decrease in net income	4,072	4,132	8,902	8,261
Cost of Revenue
Costs and expenses:
Total share-based compensation	554	589	1,058	1,013
Research and Development Costs
Costs and expenses:
Total share-based compensation	1,110	1,026	2,153	1,943
Selling, General and Administrative
Costs and expenses:
Total share-based compensation	$ 3,559	$ 3,822	$ 8,424	$ 7,874