Revenue from Contracts with Customers - Schedule of Revenues Disaggregated by Major Revenue Categories and by Occurrence (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenues	$ 146,084	$ 130,879
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	38,284	35,360
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	38,486	38,547
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	29,431	22,493
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	26,180	23,122
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	132,381	119,522
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	7,214	4,740
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	6,489	6,617
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 13,703	$ 11,357