Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Loans - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal $ 6,586 $ 4,116
Non-Accrual TDRs, Deferral of Principal and Interest 1,680 1,444
Non-Accrual TDRs, Reduction of Principal and Interest 3,017 3,246
Non-Accrual TDRs, Extension of Maturity 2,027 3,650
Non-Accrual TDRs, Total 13,310 12,456
Accrual TDRs, Deferral of Principal 4,544 9,004
Accrual Tdrs Deferral Of Principal and Interest 220 226
Accrual TDRs, Reduction of Principal and Interest 1,067 1,549
Accrual TDRs, Extension of Maturity 2,759 3,038
Accrual TDRs 8,590 13,817
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 371 2,032
Non-Accrual TDRs, Total 371 2,032
Accrual TDRs, Deferral of Principal 0 306
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 0 306
Real estate loans [Member] | Hospitality [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 1,852 1,115
Non-Accrual TDRs, Deferral of Principal and Interest (74) (53)
Non-Accrual TDRs, Reduction of Principal and Interest 0 0
Non-Accrual TDRs, Extension of Maturity 0 0
Non-Accrual TDRs, Total 1,778 1,062
Accrual TDRs, Deferral of Principal 0 1,807
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 1,807
Real estate loans [Member] | Gas station [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 2,868 1,075
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 2,868 1,075
Accrual TDRs, Deferral of Principal 349 2,335
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 349 2,335
Real estate loans [Member] | Other [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 920 943
Non-Accrual TDRs, Deferral of Principal and Interest 1,749 1,498
Non-Accrual TDRs, Reduction of Principal and Interest 384 433
Non-Accrual TDRs, Extension of Maturity 16 24
Non-Accrual TDRs, Total 3,069 2,898
Accrual TDRs, Deferral of Principal 2,249 2,343
Accrual Tdrs Deferral Of Principal and Interest 0 0
Accrual TDRs, Reduction of Principal and Interest 760 782
Accrual TDRs, Extension of Maturity 1,370 1,372
Accrual TDRs 4,379 4,497
Real estate loans [Member] | Residential property [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 716 742
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 716 742
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 304 308
Accrual TDRs 304 308
Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 10 14
Non-Accrual TDRs, Deferral of Principal and Interest 5 (1)
Non-Accrual TDRs, Reduction of Principal and Interest 2,396 2,556
Non-Accrual TDRs, Extension of Maturity 1,557 1,481
Non-Accrual TDRs, Total 3,968 4,050
Accrual TDRs, Deferral of Principal 49 57
Accrual Tdrs Deferral Of Principal and Interest 220 226
Accrual TDRs, Reduction of Principal and Interest 307 567
Accrual TDRs, Extension of Maturity 1,085 1,358
Accrual TDRs 1,661 2,208
Commercial and industrial loans [Member] | Commercial lines of credit [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 220 227
Non-Accrual TDRs, Deferral of Principal and Interest 0 0
Non-Accrual TDRs, Reduction of Principal and Interest 114 126
Non-Accrual TDRs, Extension of Maturity 83 113
Non-Accrual TDRs, Total 417 466
Accrual TDRs, Deferral of Principal 1,647 2,156
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 1,647 2,156
Commercial and industrial loans [Member] | International loans [Member]    
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal   0
Non-Accrual TDRs, Deferral of Principal and Interest   0
Non-Accrual TDRs, Reduction of Principal and Interest   0
Non-Accrual TDRs, Extension of Maturity   0
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   200
Accrual TDRs, Extension of Maturity   0
Accrual TDRs   200
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 123 131
Non-Accrual TDRs, Extension of Maturity 0 0
Non-Accrual TDRs, Total 123 131
Accrual TDRs, Deferral of Principal 250 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 $ 250 $ 0