XML 55 R53.htm IDEA: XBRL DOCUMENT v3.2.0.727
Loans and Leases - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Commercial construction loans $ 243,382   $ 296,156
Carrying amount $ 11,626,787   11,247,038
Sustained period of delinquency for impairment evaluation 90 days 90 days  
Minimum reserves for commercial loan $ 500    
Minimum amount to allocate specific valuation allowance 500    
Allowance for loan losses 6,945   7,974
Restructured loans returned to performing status 3,831    
Valuation for impairment of loans with pooled reserves 500   500
Pooled reserves for all other classes of loans 4,936   3,448
Consumer Lines of Credit [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Consumer loans 178,455   180,588
Carrying amount 1,118,970   1,110,976
Allowance for loan losses 286   267
Commercial and Industrial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount 2,453,868   2,318,015
Allowance for loan losses 607   1,484
Direct Installment [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount 1,676,349   1,644,621
Allowance for loan losses 1,562   1,847
Residential Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount 1,350,502   1,263,053
Allowance for loan losses 752   858
Indirect Installment [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount 942,801   875,551
Allowance for loan losses $ 284   $ 232
Loans and Leases Receivable Net of Deferred Income [Member] | Consumer Lines of Credit [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage of portfolio 1.50%   1.60%
Purchased Credit-Impaired Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount $ 8,808   $ 9,556
Purchased Credit-Impaired Loans [Member] | Acquired Loans Receivable [Member] | Credit Concentration Risk [Member] | Maximum [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage of portfolio 1.00%    
Specific reserves for commercial TDRs [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Reserves in allowance for loan losses, TDRs $ 510   371
Pooled reserves for commercial TDRs [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Reserves in allowance for loan losses, TDRs 1,086   1,215
Commercial Real Estate [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for loan losses $ 3,454   $ 3,286
Commercial Real Estate [Member] | Owner-Occupied [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage of portfolio 40.40%   41.60%
Commercial Real Estate [Member] | Non-Owner-Occupied [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage of portfolio 59.60%   58.40%
Commercial Real Estate [Member] | Loans and Leases Receivable Net of Deferred Income [Member] | Construction Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage of portfolio 2.10%   2.60%
Residential Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Threshold period past due for default non-accrual status of trade accounts receivable 180 days    
Carrying value of OREO through foreclosure $ 5,138    
Mortgage loans on real estate, foreclosure $ 13,154    
Commercial Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Threshold period past due for default non-accrual status of trade accounts receivable 90 days    
Installment Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Threshold period past due for default non-accrual status of trade accounts receivable 120 days