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Derivative Financial Instruments - Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Not Designated as Hedging Instrument
Jun. 30, 2014
Federal Home Loan Bank advances
instrument
Jun. 30, 2014
Cash Flow Hedging
Interest Rate Swap
InterestRateSwap
Jun. 30, 2013
Cash Flow Hedging
Interest Rate Swap
InterestRateSwap
Jun. 30, 2014
Cash Flow Hedging
Interest Rate Swap
Federal Home Loan Bank advances
Jun. 30, 2014
Cash Flow Hedging
Interest Rate Swap
Trust Preferred Securities
Jun. 30, 2014
Cash Flow Hedging
Interest rate cap
InterestRateCap
Jun. 30, 2013
Cash Flow Hedging
Interest rate cap
InterestRateCap
Jun. 30, 2014
Cash Flow Hedging
Interest rate cap
Trust Preferred Securities
Derivative [Line Items]                    
Number of interest rate derivatives held       5 2     1 1  
Notional amount of interest rate derivatives   $ 144,281   $ 56,000 $ 26,000 $ 30,000 $ 26,000 $ 13,000 $ 13,000 $ 13,000
Number of debt instruments held     3              
Estimated amount to be transferred from OCI to earnings 1,403                  
Termination value of derivatives in a net liability position 4,871                  
Derivative collateral posted $ 4,451