Goodwill and Intangible Assets - Summary of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross	$ 289,728	$ 305,715
Accumulated Amortization	(151,932)	(130,115)
Net	137,796	175,600
Acquired Internal Use Software
Finite-Lived Intangible Assets [Line Items]
Gross	14,000	14,000
Accumulated Amortization	(14,000)	(14,000)
Net	0	0
Technology
Finite-Lived Intangible Assets [Line Items]
Gross	68,550	68,550
Accumulated Amortization	(39,859)	(32,749)
Net	28,691	35,801
Merchant Relationships
Finite-Lived Intangible Assets [Line Items]
Gross	181,000	181,000
Accumulated Amortization	(86,184)	(71,101)
Net	94,816	109,899
Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross	26,178	42,165
Accumulated Amortization	(11,889)	(12,265)
Net	$ 14,289	$ 29,900