Revenue from Contracts with Customers - Schedule of Revenues Disaggregated by Major Revenue Categories and by Occurrence (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenues	$ 596,350	$ 556,821	$ 540,239
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	162,636	148,403	127,602
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	155,623	152,956	158,619
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	116,722	103,138	104,549
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	104,732	98,322	98,543
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	539,713	502,819	489,313
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	31,347	28,825	27,270
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	25,290	25,177	23,656
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 56,637	$ 54,002	$ 50,926