Summary of Significant Accounting Policies - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Costs and expenses:
Total share-based compensation	$ 4,621	$ 4,698	$ 13,828	$ 11,949
Income tax benefit	(1,158)	(1,180)	(3,475)	(2,949)
Decrease in net income	3,463	3,518	10,353	9,000
Cost of Revenue
Costs and expenses:
Total share-based compensation	531	358	1,530	939
Research and Development Costs
Costs and expenses:
Total share-based compensation	963	860	2,808	2,196
Selling, General and Administrative
Costs and expenses:
Total share-based compensation	$ 3,127	$ 3,480	$ 9,490	$ 8,814