Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail)

v3.7.0.1
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