Segment Information - Reconciliation of Income from Operations to Consolidated Net Income (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment income from operations
Income from operations		$ 27,622	$ 25,429	$ 54,628	$ 50,318
Interest expense, net		(6,083)	(6,422)	(12,180)	(13,256)
Earnings of equity method investment		84	343	199	664
Other income		764	385	1,049	2,376
Income tax expense		(2,120)	(1,962)	(4,366)	(4,123)
Net income		20,267	17,773	39,330	35,979
Operating Segments [Member]
Segment income from operations
Income from operations		37,604	36,204	74,478	70,749
Operating Segments [Member] | Merchant Acquiring, net [Member]
Segment income from operations
Income from operations		9,626	8,777	19,017	17,181
Operating Segments [Member] | Payment Processing [Member]
Segment income from operations
Income from operations		14,511	15,314	28,220	30,031
Operating Segments [Member] | Business Solutions [Member]
Segment income from operations
Income from operations		13,467	12,113	27,241	23,537
Segment Reconciling Items [Member]
Segment income from operations
Income from operations	[1]	$ (9,982)	$ (10,775)	$ (19,850)	$ (20,431)

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