Derivative Financial Instruments - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) InterestRateSwap InterestRateCap instrument	Jun. 30, 2014 USD ($) InterestRateSwap InterestRateCap
Derivative [Line Items]
Estimated amount to be transferred from OCI to earnings	$ 1,325
Termination value of derivatives in a net liability position	6,234
Derivative collateral posted	10,031
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 152,839
Federal Home Loan Bank advances
Derivative [Line Items]
Number of debt instruments held | instrument	3
Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Number of interest rate derivatives held | InterestRateSwap	5	5
Notional amount of interest rate derivatives	$ 56,000	$ 56,000
Cash Flow Hedging | Interest Rate Swap | Federal Home Loan Bank advances
Derivative [Line Items]
Notional amount of interest rate derivatives	30,000
Cash Flow Hedging | Interest Rate Swap | Trust Preferred Securities
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 26,000
Cash Flow Hedging | Interest rate cap
Derivative [Line Items]
Number of interest rate derivatives held | InterestRateCap	1	1
Notional amount of interest rate derivatives	$ 13,000	$ 13,000
Cash Flow Hedging | Interest rate cap | Trust Preferred Securities
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 13,000