Revenues, by Product Line (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Revenues	$ 308,637	$ 238,701	$ 265,822	$ 232,817	$ 290,224	$ 249,644	$ 254,808	$ 221,473	$ 1,045,977	$ 1,016,149	$ 864,928
Retail payments processing
Revenue from External Customer [Line Items]
Revenues									402,454	406,023	410,200
Online banking and community financial services
Revenue from External Customer [Line Items]
Revenues									219,698	227,659	223,902
Wholesale banking payments
Revenue from External Customer [Line Items]
Revenues									41,545	37,879	35,396
Payment fraud management
Revenue from External Customer [Line Items]
Revenues									27,373	36,235	37,136
Card and merchant management
Revenue from External Customer [Line Items]
Revenues									70,175	32,887	18,072
Tools and infrastructure
Revenue from External Customer [Line Items]
Revenues									42,783	40,427	38,241
Billers
Revenue from External Customer [Line Items]
Revenues									$ 241,949	$ 235,039	$ 101,981