Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Costs and expenses:
Total share-based compensation	$ 5,933	$ 4,621	$ 16,763	$ 13,828
Income tax benefit	(1,433)	(1,158)	(4,002)	(3,475)
Decrease in net income	4,500	3,463	12,761	10,353
Cost of Revenue
Costs and expenses:
Total share-based compensation	506	531	1,519	1,530
Research and Development Costs
Costs and expenses:
Total share-based compensation	1,081	963	3,024	2,808
Selling, General and Administrative
Costs and expenses:
Total share-based compensation	$ 4,346	$ 3,127	$ 12,220	$ 9,490