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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 6 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Operating Leases |  |  |  |
2016 |  | $ 903 |  |
2017 |  | 3,832 |  |
2018 |  | 3,898 |  |
2019 |  | 3,707 |  |
2020 |  | 3,385 |  |
Thereafter |  | 6,321 |  |
Total |  | 22,046 |  |
Minimum payments due on minimum sublease rentals under non-cancelable subleases |  | 175 |  |
Rent expense |  | 2,800 | $ 3,200 |
Visa Inc. |  |  |  |
Litigation Matters |  |  |  |
Balance of escrow account for legal settlements | $ 1,000,000 |  |  |
Visa Inc. | Pending due to reversal |  |  |  |
Litigation Matters |  |  |  |
Class settlement agreement amount, reversed by appellate court | $ 4,000,000 |  |  |
Loan commitments and standby letters of credit, unused |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | 416,500 |  | $ 376,600
Loan commitments and standby letters of credit, unused | Interest payable and other liabilities |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Allowance for off balance sheet commitments |  | 899 |  | $ 749
Commercial lines of credit |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | 212,600 |  |
Revolving home equity lines |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | 149,000 |  |
Undisbursed construction loans |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | 40,700 |  |
Standby letters of credit |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | 3,500 |  |
Personal and other lines of credit |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loan commitments and standby letters of credit, off-balance sheet |  | $ 10,700 |  |

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