Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Deferred revenue, revenue recognized	$ 17,000	$ 21,200
Account Services
Disaggregation of Revenue [Line Items]
Operating revenues	231,309	220,689
Account Services | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Operating revenues	124,120	140,922
Account Services | Transferred over time
Disaggregation of Revenue [Line Items]
Operating revenues	107,189	79,767
Processing and Settlement Services
Disaggregation of Revenue [Line Items]
Operating revenues	124,017	109,008
Processing and Settlement Services | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Operating revenues	123,066	107,576
Processing and Settlement Services | Transferred over time
Disaggregation of Revenue [Line Items]
Operating revenues	$ 951	$ 1,432