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Segment Information - Reportable Segment Results (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | $ 1,559,869 | $ 1,723,691 | $ 1,492,639
Interest income | 5,850 | 9,304 | 16,167
Fleet Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 918,310 | 1,038,395 | 975,140
Interest income | 4,326 | 6,249 | 3,503
Travel and Corporate Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 277,840 | 367,826 | 303,344
Interest income | 272 | 1,521 | 958
Health and Employee Benefit Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 363,719 | 317,470 | 214,155
Interest income | 1,252 | 1,534 | 11,706
Payment processing revenue |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 698,891 | 825,592 | 723,991
Payment processing revenue | Fleet Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 404,843 | 457,244 | 464,980
Payment processing revenue | Travel and Corporate Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 229,144 | 303,385 | 203,289
Payment processing revenue | Health and Employee Benefit Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 64,904 | 64,963 | 55,722
Account servicing revenue |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 449,456 | 413,552 | 308,096
Account servicing revenue | Fleet Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 153,823 | 164,735 | 162,662
Account servicing revenue | Travel and Corporate Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 41,927 | 43,293 | 37,262
Account servicing revenue | Health and Employee Benefit Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 253,706 | 205,524 | 108,172
Finance fee revenue |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 198,523 | 247,318 | 208,627
Finance fee revenue | Fleet Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 197,307 | 245,082 | 190,528
Finance fee revenue | Travel and Corporate Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 1,079 | 2,086 | 1,391
Finance fee revenue | Health and Employee Benefit Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 137 | 150 | 16,708
Other revenue |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 212,999 | 237,229 | 251,925
Other revenue | Fleet Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 162,337 | 171,334 | 156,970
Other revenue | Travel and Corporate Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | 5,690 | 19,062 | 61,402
Other revenue | Health and Employee Benefit Solutions |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenues | $ 44,972 | $ 46,833 | $ 33,553

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