Revenue from Contracts with Customers - Schedule of Revenues Disaggregated by Major Revenue Categories and by Occurrence (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenues	$ 141,752	$ 137,740	$ 412,633	$ 403,857
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	37,958	33,163	110,185	94,718
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	37,914	39,936	114,537	118,948
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	27,395	26,830	76,106	77,730
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	24,976	24,858	72,628	73,427
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	128,243	124,787	373,456	364,823
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	7,908	7,210	20,662	22,563
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	5,601	5,743	18,515	16,471
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 13,509	$ 12,953	$ 39,177	$ 39,034