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Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Deferred revenue, revenue recognized | $ 200 | $ 100 | $ 31,600 | $ 28,500
Account Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | 178,298 | 186,623 | 599,703 | 597,350
Account Services | Transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | 114,418 | 120,427 | 378,492 | 381,738
Account Services | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | 63,880 | 66,196 | 221,211 | 215,612
Processing and Settlement Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | 55,633 | 43,954 | 233,945 | 206,574
Processing and Settlement Services | Transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | 54,616 | 43,040 | 229,263 | 203,888
Processing and Settlement Services | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Operating revenues | $ 1,017 | $ 914 | $ 4,682 | $ 2,686

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