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Loans - Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Nonaccrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 17,034 | $ 55,478
Nonaccrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 15,649 | 41,798
Nonaccrual TDRs | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 724 | 12,991
Nonaccrual TDRs | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 661 | 689
Nonaccrual TDRs | Deferral of Principal |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 661 | 689
Nonaccrual TDRs | Deferral of Principal | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 661 | 689
Nonaccrual TDRs | Deferral of Principal and/or Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 1,664 | 285
Nonaccrual TDRs | Deferral of Principal and/or Interest | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 1,483 | 132
Nonaccrual TDRs | Deferral of Principal and/or Interest | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 181 | 153
Nonaccrual TDRs | Reduction of Principal and/or Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 13,795 | 40,266
Nonaccrual TDRs | Reduction of Principal and/or Interest | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 13,548 | 27,740
Nonaccrual TDRs | Reduction of Principal and/or Interest | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 247 | 12,527
Nonaccrual TDRs | Extension of Maturity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 914 | 14,238
Nonaccrual TDRs | Extension of Maturity | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 618 | 13,926
Nonaccrual TDRs | Extension of Maturity | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 296 | 312
Accrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 14,524 | 830
Accrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 13,796 |
Accrual TDRs | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 136 | 222
Accrual TDRs | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 592 | 608
Accrual TDRs | Deferral of Principal |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 521 | 531
Accrual TDRs | Deferral of Principal | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 521 | 531
Accrual TDRs | Deferral of Principal and/or Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 36
Accrual TDRs | Deferral of Principal and/or Interest | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 36
Accrual TDRs | Reduction of Principal and/or Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 122 | 148
Accrual TDRs | Reduction of Principal and/or Interest | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 51 | 71
Accrual TDRs | Reduction of Principal and/or Interest | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 71 | 77
Accrual TDRs | Extension of Maturity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 13,881 | 114
Accrual TDRs | Extension of Maturity | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 13,796 |
Accrual TDRs | Extension of Maturity | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 85 | $ 114

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