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Revenue - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | $ 244,872 |  | $ 721,411 |
Non-Topic 606 revenues | 382,690 | $ 324,002 | 1,108,395 | $ 919,243
Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 134,664 |  | 395,954 |
Non-Topic 606 revenues | 249,612 | 212,078 | 721,447 | 603,205
Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 64,528 |  | 181,381 |
Non-Topic 606 revenues | 82,810 | 61,026 | 225,353 | 163,739
Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 45,680 |  | 144,076 |
Non-Topic 606 revenues | 50,268 | 50,898 | 161,595 | 152,299
Payment processing revenue |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 182,871 | 145,702 | 530,063 | 423,434
Payment processing revenue | Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 116,023 | 90,270 | 335,896 | 264,210
Payment processing revenue | Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 54,345 | 44,177 | 150,411 | 119,328
Payment processing revenue | Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 12,503 | $ 11,255 | 43,756 | $ 39,896
Account servicing revenue |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 42,858 |  | 128,899 |
Non-Topic 606 revenues | 35,890 |  | 107,269 |
Account servicing revenue | Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 6,920 |  | 20,770 |
Non-Topic 606 revenues | 35,890 |  | 107,269 |
Account servicing revenue | Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 9,120 |  | 27,584 |
Non-Topic 606 revenues | 0 |  | 0 |
Account servicing revenue | Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 26,818 |  | 80,545 |
Non-Topic 606 revenues | 0 |  | 0 |
Finance fee revenue |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 53,703 |  | 154,958 |
Finance fee revenue | Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 51,644 |  | 140,436 |
Finance fee revenue | Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 670 |  | 1,157 |
Finance fee revenue | Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 1,389 |  | 13,365 |
Other revenue |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 19,143 |  | 62,449 |
Non-Topic 606 revenues | 48,225 |  | 124,757 |
Other revenue | Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 11,721 |  | 39,288 |
Non-Topic 606 revenues | 27,414 |  | 77,788 |
Other revenue | Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 1,063 |  | 3,386 |
Non-Topic 606 revenues | 17,612 |  | 42,815 |
Other revenue | Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Topic 606 revenues | 6,359 |  | 19,775 |
Non-Topic 606 revenues | 3,199 |  | 4,154 |
Total non-Topic 606 revenues |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 137,818 |  | 386,984 |
Total non-Topic 606 revenues | Fleet Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 114,948 |  | 325,493 |
Total non-Topic 606 revenues | Travel and corporate solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | 18,282 |  | 43,972 |
Total non-Topic 606 revenues | Health and Employee Benefit Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Non-Topic 606 revenues | $ 4,588 |  | $ 17,519 |

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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