Intangible Assets - Definite-lived (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 529,807	$ 513,819
Accumulated Amortization	(415,882)	(362,972)
Net Carrying Amount	113,925	150,847
Merchant and bank-branding contracts/relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	489,363	476,429
Accumulated Amortization	(388,598)	(340,899)
Net Carrying Amount	100,765	135,530
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,391	18,010
Accumulated Amortization	(12,792)	(9,804)
Net Carrying Amount	5,599	8,206
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,389	10,963
Accumulated Amortization	(7,952)	(6,490)
Net Carrying Amount	4,437	4,473
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,408	4,247
Accumulated Amortization	(4,408)	(4,244)
Net Carrying Amount	0	3
Revolving credit facility deferred financing costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,256	4,170
Accumulated Amortization	(2,132)	(1,535)
Net Carrying Amount	$ 3,124	$ 2,635