Intangible Assets - Definite-lived (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 527,693	$ 526,881
Accumulated Amortization	(332,992)	(317,678)
Net Carrying Amount	194,701	209,203
Merchant and Bank Branding Contracts / Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	490,745	490,332
Accumulated Amortization	(313,453)	(299,801)
Net Carrying Amount	177,292	190,531
Trade Name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,803	18,480
Accumulated Amortization	(8,251)	(7,091)
Net Carrying Amount	10,552	11,389
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,952	10,901
Accumulated Amortization	(5,521)	(5,230)
Net Carrying Amount	5,431	5,671
Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,457	4,438
Accumulated Amortization	(4,368)	(4,308)
Net Carrying Amount	89	130
Deferred Financing Costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,736	2,730
Accumulated Amortization	(1,399)	(1,248)
Net Carrying Amount	$ 1,337	$ 1,482