Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Computer hardware and software	$ 393,217	$ 341,282
Card-reading equipment	25,427	24,077
Furniture, fixtures, and vehicles	19,575	19,319
Buildings and improvements	30,467	29,127
Property, plant and equipment, gross	468,686	413,805
Less: accumulated depreciation	(266,177)	(213,980)
Property, plant and equipment, net	$ 202,509	$ 199,825
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	3 years
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	5 years
Card-reading equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	4 years
Card-reading equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	6 years
Furniture, fixtures, and vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	2 years
Furniture, fixtures, and vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	10 years
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	50 years