Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Computer hardware and software	$ 291,404		$ 244,655
Card reading equipment	20,117		25,462
Furniture fixtures and Vehicles	18,308		18,846
Buildings and improvements	21,854		21,603
Property, plant and equipment, gross	351,683		310,566
Less: accumulated depreciation	(165,482)		(130,509)
Property, plant and equipment, net	$ 186,201	[1]	$ 180,057
Minimum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	3 years
Minimum | Card-reading equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	4 years
Minimum | Furniture, fixtures, and vehicles
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	2 years
Minimum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	5 years
Maximum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	5 years
Maximum | Card-reading equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	6 years
Maximum | Furniture, fixtures, and vehicles
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	10 years
Maximum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (in Years)	50 years

[1] Reflects the impact of the Company's adoption of ASC 606 and related cost capitalization guidance, which was adopted by the Company on January 1, 2018 using the modified retrospective transition method. The adoption of ASC 606 resulted in an adjustment to retained earnings in our consolidated balance sheet for the cumulative effect of applying the standard, which included costs incurred to obtain a contract, as well as presentation changes in our statements of income, including the classification of certain amounts previously classified as merchant commissions and processing expense net with revenues. As a result of the application of the modified retrospective transition method, the Company's prior period results within its Form 10-K and quarterly reports on Form 10-Q will not be restated to reflect ASC 606.