XML 99 R84.htm IDEA: XBRL DOCUMENT v3.3.1.900
Loans and Allowance for Credit Losses - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Contract
loan
Dec. 31, 2014
USD ($)
Contract
Dec. 31, 2013
USD ($)
Contract
Dec. 31, 2012
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Provision for credit losses   $ 14,948,000 $ 11,196,000 $ 19,227,000  
Charge-offs   18,868,000 17,472,000 $ 35,178,000  
Recorded Investment $ 50,844,000 $ 50,844,000 $ 55,251,000    
Number of loans modified | Contract   61 77 82  
Total amount of loan modified 10,956,000 $ 10,956,000 $ 15,967,000 $ 7,713,000  
Gain (loss) on sale of impaired loans   400,000 77,000    
Off balance sheet reserve to nonperforming loans     14,000    
Nonaccrual 36,705,000 36,705,000 42,667,000    
Loans held for sale 5,763,000 5,763,000 2,502,000    
Total gains or losses included in earnings   111,000 77,000    
Loans with modification to rate and payment due to amortization   $ 3,700,000 600,000 2,000,000  
Minimum days required for conversion of trouble debt to be in default   90 days      
Impaired Loans [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Unfunded commitments related to nonperforming loans 100,000 $ 100,000 46,000    
Unallocated [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Provision for credit losses       (5,926,000)  
Charge-offs       $ 0  
Consumer Loan [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Non Accrual Status Of Loans After Number Of Days Past Due   150 days      
Local Energy Company [Member] | Nonaccrual Commercial Loans [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Chargeoffs of loans 2,000,000        
Nonaccrual 3,900,000 $ 3,900,000      
Reserve for Off-balance Sheet Activities [Member] | Impaired Loans [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Off balance sheet reserve to nonperforming loans 0 0      
Loans Held for Sale [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total gains or losses included in earnings   $ 0 $ 77,000    
Residential real estate [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Number of loans modified | Contract   32 52 46  
Total amount of loan modified 1,575,000 $ 1,575,000 $ 2,062,000 $ 2,316,000  
Commercial real estate [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Number of loans modified | Contract   1 1 5  
Total amount of loan modified 389,000 $ 389,000 $ 6,000 $ 2,184,000  
Manufacturer of Sporting Goods [Member] | Commercial and Industrial Sector [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Nonaccrual 3,900,000 3,900,000      
Oil and Gas Well Services Company [Member] | Commercial and Industrial Sector [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Nonaccrual 7,500,000 $ 7,500,000      
Local Energy Company [Member] | Commercial and Industrial Sector [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Number of loans modified | loan   2      
Total amount of loan modified     $ 2,900,000   $ 2,300,000
Chargeoffs of loans   $ 3,300,000      
Nonaccrual $ 5,600,000 $ 5,600,000