Intangible Assets - Intangible Assets with Definite Lives (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 527,090	$ 529,807
Accumulated Amortization	(439,054)	(415,882)
Net Carrying Amount	88,036	113,925
Merchant and bank-branding contracts/relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	488,725	489,363
Accumulated Amortization	(410,685)	(388,598)
Net Carrying Amount	78,040	100,765
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,315	18,391
Accumulated Amortization	(13,190)	(12,792)
Net Carrying Amount	3,125	5,599
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,895	12,389
Accumulated Amortization	(8,615)	(7,952)
Net Carrying Amount	3,280	4,437
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,335	4,408
Accumulated Amortization	(4,335)	(4,408)
Net Carrying Amount	0	0
Revolving credit facility deferred financing costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,820	5,256
Accumulated Amortization	(2,229)	(2,132)
Net Carrying Amount	$ 3,591	$ 3,124