Intangible Assets - Intangible Assets with Definite Lives (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 520,117	$ 529,807
Accumulated Amortization	(426,165)	(415,882)
Net Carrying Amount	93,952	113,925
Merchant and bank-branding contracts/relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	480,852	489,363
Accumulated Amortization	(398,945)	(388,598)
Net Carrying Amount	81,907	100,765
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,628	18,391
Accumulated Amortization	(12,555)	(12,792)
Net Carrying Amount	5,073	5,599
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,934	12,389
Accumulated Amortization	(8,322)	(7,952)
Net Carrying Amount	3,612	4,437
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,348	4,408
Accumulated Amortization	(4,348)	(4,408)
Net Carrying Amount	0	0
Revolving credit facility deferred financing costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,355	5,256
Accumulated Amortization	(1,995)	(2,132)
Net Carrying Amount	$ 3,360	$ 3,124