Revenue from Contracts with Customers - Summary of Adjustments to Reflect Cumulative Effect of Changes to Balances of Previously Reported Consolidated Balance Sheet for Adoption of ASC 606 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
ASSETS
Accounts receivable, net	$ 80,006	$ 87,459		$ 84,962
Contract assets	12,529	13,242
Prepaid expenses and other current assets	26,305	20,946		17,360
Deferred income taxes, net	10,620	6,194		9,219
Contract assets, net of current	3,007	3,747
Other assets	33,656	32,478		18,795
LIABILITIES
Contract liabilities	56,786	56,009		54,079
Accrued compensation and related benefits	23,792	25,663		27,910
Other current liabilities	41,352	41,064		48,317
Contract liabilities, net of current				1,173
Shareholders' equity:
Retained earnings	$ 119,119	111,621		$ 78,708
Adoption of ASC 606
ASSETS
Accounts receivable, net			$ 87,342
Contract assets			13,446
Prepaid expenses and other current assets			17,137
Deferred income taxes, net			6,335
Contract assets, net of current			2,731
Other assets			25,474
LIABILITIES
Contract liabilities			58,253
Accrued compensation and related benefits			28,655
Other current liabilities			58,281
Shareholders' equity:
Retained earnings			87,127
Adoption of ASC 606 | ASC 606 Transition Adjustments
ASSETS
Accounts receivable, net		1,220	2,380
Contract assets		(13,242)	13,446
Prepaid expenses and other current assets		692	(223)
Deferred income taxes, net		4,457	(2,884)
Contract assets, net of current		(3,747)	2,731
Other assets		(12,611)	6,679
LIABILITIES
Contract liabilities		(1,348)	4,174
Accrued compensation and related benefits		712	745
Other current liabilities		(7,838)	9,964
Contract liabilities, net of current		888	(1,173)
Shareholders' equity:
Retained earnings		$ (15,236)	$ 8,419