Revenue from Contracts with Customers - Schedule of Revenues Disaggregated by Major Revenue Categories and by Occurrence (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenues	$ 140,002	$ 134,256	$ 270,881	$ 266,117
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	36,867	31,411	72,227	61,555
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	38,076	39,360	76,623	79,012
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	26,218	25,219	48,711	50,900
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	24,530	24,599	47,652	48,569
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	125,691	120,589	245,213	240,036
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	8,014	8,258	12,754	15,353
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	6,297	5,409	12,914	10,728
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 14,311	$ 13,667	$ 25,668	$ 26,081