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Loans and Leases - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | $ 2,649 | $ 1,828
Non-Accrual TDRs, Deferral of Principal and Interest | 4,428 | 4,444
Non-Accrual TDRs, Reduction of Principal and Interest | 131 | 212
Non-Accrual TDRs, Extension of Maturity | 401 | 419
Non-Accrual TDRs, Total | 7,609 | 6,903
Accrual TDRs, Deferral of Principal | 3,850 | 4,817
Accrual Tdrs Deferral Of Principal and Interest | 193 | 198
Accrual TDRs, Reduction of Principal and Interest | 3,462 | 3,768
Accrual TDRs, Extension of Maturity | 1,856 | 2,363
Accrual TDRs | 9,361 | 11,146
Real estate loans [Member] | Retail [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 0 | 0
Non-Accrual TDRs, Deferral of Principal and Interest | 0 | 0
Non-Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 0 | 0
Accrual TDRs, Deferral of Principal | 0 | 0
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 1,218 | 1,228
Accrual TDRs, Extension of Maturity | 0 | 0
Accrual TDRs | 1,218 | 1,228
Real estate loans [Member] | Hospitality [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 1,271 | 1,292
Non-Accrual TDRs, Deferral of Principal and Interest | 3,722 | 3,722
Non-Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 4,993 | 5,014
Accrual TDRs, Deferral of Principal | 0 | 0
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Accrual TDRs, Extension of Maturity | 0 | 0
Accrual TDRs | 0 | 0
Real estate loans [Member] | Gas station [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 0 | 0
Non-Accrual TDRs, Deferral of Principal and Interest | 0 | 0
Non-Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 0 | 0
Accrual TDRs, Deferral of Principal | 1,307 | 1,324
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Accrual TDRs, Extension of Maturity | 0 | 0
Accrual TDRs | 1,307 | 1,324
Real estate loans [Member] | Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 1,232 | 387
Non-Accrual TDRs, Deferral of Principal and Interest | 636 | 651
Non-Accrual TDRs, Reduction of Principal and Interest | 72 | 143
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 1,940 | 1,181
Accrual TDRs, Deferral of Principal | 1,748 | 2,688
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 56 | 286
Accrual TDRs, Extension of Maturity | 976 | 1,344
Accrual TDRs | 2,780 | 4,318
Real estate loans [Member] | Residential property [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 0 | 0
Non-Accrual TDRs, Deferral of Principal and Interest | 0 | 0
Non-Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 0 | 0
Accrual TDRs, Deferral of Principal | 777 | 783
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Accrual TDRs, Extension of Maturity | 286 | 289
Accrual TDRs | 1,063 | 1,072
Commercial and industrial loans [Member] | Commercial term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 146 | 149
Non-Accrual TDRs, Deferral of Principal and Interest | 70 | 71
Non-Accrual TDRs, Reduction of Principal and Interest | 59 | 69
Non-Accrual TDRs, Extension of Maturity | 401 | 419
Non-Accrual TDRs, Total | 676 | 708
Accrual TDRs, Deferral of Principal | 18 | 22
Accrual Tdrs Deferral Of Principal and Interest | 193 | 198
Accrual TDRs, Reduction of Principal and Interest | 2,072 | 2,135
Accrual TDRs, Extension of Maturity | 594 | 662
Accrual TDRs | 2,877 | 3,017
Commercial and industrial loans [Member] | Commercial lines of credit [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal |  |
Non-Accrual TDRs, Deferral of Principal and Interest |  |
Non-Accrual TDRs, Reduction of Principal and Interest |  |
Non-Accrual TDRs, Extension of Maturity |  |
Non-Accrual TDRs, Total |  | 0
Accrual TDRs, Deferral of Principal |  | 0
Accrual Tdrs Deferral Of Principal and Interest |  | 0
Accrual TDRs, Reduction of Principal and Interest |  | 0
Accrual TDRs, Extension of Maturity |  | 68
Accrual TDRs |  | 68
Consumer loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Non-Accrual TDRs, Deferral of Principal | 0 | 0
Non-Accrual TDRs, Deferral of Principal and Interest | 0 | 0
Non-Accrual TDRs, Reduction of Principal and Interest | 0 | 0
Non-Accrual TDRs, Extension of Maturity | 0 | 0
Non-Accrual TDRs, Total | 0 | 0
Accrual TDRs, Deferral of Principal | 0 | 0
Accrual Tdrs Deferral Of Principal and Interest | 0 | 0
Accrual TDRs, Reduction of Principal and Interest | 116 | 119
Accrual TDRs, Extension of Maturity | 0 | 0
Accrual TDRs | $ 116 | $ 119

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