Revenues - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Account Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 783,196	$ 790,343
Processing and Settlement Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	293,458	251,415
Transferred at a point in time | Account Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	489,696	500,629
Transferred at a point in time | Processing and Settlement Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	287,052	247,942
Transferred over time | Account Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	293,500	289,714
Transferred over time | Processing and Settlement Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 6,406	$ 3,473