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, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenues	$ 131,861	$ 133,200
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	30,144	28,328
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	39,652	41,248
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	25,681	26,270
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	23,970	24,161
Recurring
Disaggregation Of Revenue [Line Items]
Total revenues	119,447	120,007
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	7,095	7,443
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	5,319	5,750
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 12,414	$ 13,193