Segment Information - Information about Operations by Business Segments (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenues		$ 93,241	$ 91,333	$ 184,573	$ 178,766
Income from operations		27,622	25,429	54,628	50,318
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations		37,604	36,204	74,478	70,749
Operating Segments [Member] | Merchant Acquiring, net [Member]
Segment Reporting Information [Line Items]
Revenues		21,165	19,827	41,256	39,118
Income from operations		9,626	8,777	19,017	17,181
Operating Segments [Member] | Payment Processing [Member]
Segment Reporting Information [Line Items]
Revenues		33,702	33,252	66,802	65,094
Income from operations		14,511	15,314	28,220	30,031
Operating Segments [Member] | Business Solutions [Member]
Segment Reporting Information [Line Items]
Revenues		45,317	44,888	90,181	87,805
Income from operations		13,467	12,113	27,241	23,537
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Income from operations	[1]	(9,982)	(10,775)	(19,850)	(20,431)
Other [Member]
Segment Reporting Information [Line Items]
Revenues	[2]	$ (6,943)	$ (6,634)	$ (13,666)	$ (13,251)

[1] Primarily represents non-operating depreciation and amortization expenses generated as a result of the Merger and certain non-recurring fees and expenses.

[2] Represents the elimination of intersegment revenues for services provided by the Payment Processing segment to the Merchant Acquiring segment, and other miscellaneous intersegment revenues.