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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating Leases |  |  |
2018 | $ 4,444 |  |
2019 | 4,198 |  |
2020 | 3,758 |  |
2021 | 2,138 |  |
2022 | 1,330 |  |
Thereafter | 2,904 |  |
Total | 18,772 |  |
Minimum payments due on minimum sublease rentals under non-cancelable subleases | 51 |  |
Rent expense included in occupancy expense | 4,100 | $ 3,900 | $ 4,200
Visa Inc. |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated amount due to class plaintiffs in Visa litigation | 4,000,000 |  |
Balance of escrow account for legal settlements maintained by Visa | $ 828,000 |  |
Pending Litigation [Member] | Visa Inc. |  |  |
Loss Contingencies [Line Items] |  |  |
Settlements reached by percentage of sales volume of merchants who opted out in Visa litigation, percent | 51.00% |  |

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