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, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenues	$ 130,879	$ 131,861
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	35,360	30,144
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	38,547	39,652
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	22,493	25,681
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	23,122	23,970
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	119,522	119,447
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	4,740	7,095
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	6,617	5,319
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 11,357	$ 12,414