Revenue Recognition - Summary of Revenue Disaggregated by Major Product Category and the Related Financial Statement Classification of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 104,846	$ 95,195	$ 207,283	$ 186,491
Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	71,288	63,187	141,056	123,901
Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	5,665	2,620	10,177	4,985
Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	26,786	28,433	54,191	55,775
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	1,107	955	1,859	1,830
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Total revenues	104,846	95,195	207,283	186,491
Operating Segments [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	71,288		141,056
Operating Segments [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	5,665		10,177
Operating Segments [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	26,786		54,191
Operating Segments [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	1,107		1,859
Operating Segments [Member] | Settlement Network Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	31,179		62,358
Operating Segments [Member] | Settlement Network Solutions [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	24,881		49,163
Operating Segments [Member] | Settlement Network Solutions [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	235		807
Operating Segments [Member] | Settlement Network Solutions [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	6,063		12,388
Operating Segments [Member] | Legal Spend Management Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	19,149		37,545
Operating Segments [Member] | Legal Spend Management Solutions [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	19,149		37,545
Operating Segments [Member] | Banking Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	23,128	20,954	45,380	42,275
Operating Segments [Member] | Banking Solutions [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	15,925		31,591
Operating Segments [Member] | Banking Solutions [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,100		3,426
Operating Segments [Member] | Banking Solutions [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	5,103		10,363
Operating Segments [Member] | Payments and Transactional Documents [Member]
Disaggregation of Revenue [Line Items]
Total revenues	25,943	$ 25,343	52,177	$ 48,392
Operating Segments [Member] | Payments and Transactional Documents [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	11,045		21,614
Operating Segments [Member] | Payments and Transactional Documents [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	1,499		3,653
Operating Segments [Member] | Payments and Transactional Documents [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	12,601		25,360
Operating Segments [Member] | Payments and Transactional Documents [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	798		1,550
Operating Segments [Member] | Health Care [Member]
Disaggregation of Revenue [Line Items]
Total revenues	1,567		3,710
Operating Segments [Member] | Health Care [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	231		1,057
Operating Segments [Member] | Health Care [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	464		883
Operating Segments [Member] | Health Care [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	872		1,770
Operating Segments [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	3,880		6,113
Operating Segments [Member] | Other [Member] | Subscriptions and Transactions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	57		86
Operating Segments [Member] | Other [Member] | Software Licenses [Member]
Disaggregation of Revenue [Line Items]
Total revenues	1,367		1,408
Operating Segments [Member] | Other [Member] | Service and Maintenance [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,147		4,310
Operating Segments [Member] | Other [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 309		$ 309