Intangible Assets - Intangible Assets with Definite Lives (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 516,487	$ 529,807
Accumulated Amortization	(417,366)	(415,882)
Net Carrying Amount	99,121	113,925
Merchant and bank-branding contracts/relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	477,449	489,363
Accumulated Amortization	(390,519)	(388,598)
Net Carrying Amount	86,930	100,765
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,209	18,391
Accumulated Amortization	(12,013)	(12,792)
Net Carrying Amount	5,196	5,599
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,239	12,389
Accumulated Amortization	(8,201)	(7,952)
Net Carrying Amount	4,038	4,437
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,334	4,408
Accumulated Amortization	(4,334)	(4,408)
Net Carrying Amount	0	0
Revolving credit facility deferred financing costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,256	5,256
Accumulated Amortization	(2,299)	(2,132)
Net Carrying Amount	$ 2,957	$ 3,124