Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum [Member] Computer Hardware and Software [Member]	Dec. 31, 2013 Minimum [Member] Furniture, Fixtures and Vehicles [Member]	Dec. 31, 2013 Minimum [Member] Building and Improvements [Member]	Dec. 31, 2013 Maximum [Member] Computer Hardware and Software [Member]	Dec. 31, 2013 Maximum [Member] Card-Reading Equipment [Member]	Dec. 31, 2013 Maximum [Member] Furniture, Fixtures and Vehicles [Member]	Dec. 31, 2013 Maximum [Member] Building and Improvements [Member]
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Estimated Useful Lives			3 years	3 years	10 years	7 years	5 years	6 years	30 years
Computer hardware and software	$ 78,460	$ 65,988
Card-reading equipment	12,649	10,218
Furniture, fixtures, and vehicles	9,420	7,986
Buildings and improvements	10,571	9,710
Property, plant and equipment, gross	111,100	93,902
Less: accumulated depreciation	(57,144)	(48,706)
Property, plant and equipment, net	$ 53,956	$ 45,196