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Derivative Financial Instruments - Additional Information (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
Contract
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Contract
Apr. 04, 2013
USD ($)
Designated as Hedging Instrument [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Accumulated net, after tax (loss) gain included in other comprehensive loss $ 35,000 $ (820,000)    
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Period for which cash flow hedges will be used to hedge quarterly interest payments 5 years      
Derivative inception date Dec. 31, 2014      
Derivative maturity date Dec. 31, 2019      
Description of variable rate basis for derivative three-month LIBOR      
Ineffectiveness related to interest rate swap designated as a cash flow hedge $ 0 0    
Accumulated net, after tax (loss) gain included in other comprehensive loss $ 78,000   $ (17,000)  
The period over which OCI will be reclassified as interest expense 12 months      
Estimated amount to be reclassified as an increase to interest expense $ 178,000      
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Junior Subordinated Debentures [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Total notional amount       $ 60,000,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Three-month LIBOR [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Swap fixed interest rate to be paid 1.66%      
Derivatives not Designated as Hedging Instruments [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Total notional amount $ 285,500,000   $ 262,000,000  
Net positive ineffectiveness on MSR fair value $ 2,800,000 $ 413,000    
Derivatives not Designated as Hedging Instruments [Member] | Beneficiary [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Number of risk participation agreements | Contract 2   2  
Aggregate notional amount of credit risk participation agreements $ 14,100,000   $ 14,200,000  
Derivatives not Designated as Hedging Instruments [Member] | Guarantor [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Number of risk participation agreements | Contract 5   5  
Aggregate notional amount of credit risk participation agreements $ 27,900,000   $ 28,000,000  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Total notional amount 336,700,000   340,200,000  
Termination value of derivatives 711,000   1,200,000  
Collateral Posted 100,000      
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Off-balance sheet obligations 231,000,000   195,000,000  
Valuation adjustment (1,200,000)   2,800,000  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Lock Commitments [Member]        
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]        
Off-balance sheet obligations 143,500,000   97,900,000  
Valuation adjustment $ 2,100,000   $ 1,000,000