Derivative Financial Instruments - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Federal Home Loan Bank advances instrument	Sep. 30, 2013 Cash Flow Hedging Interest Rate Swap contract	Dec. 31, 2012 Cash Flow Hedging Interest Rate Swap contract	Sep. 30, 2013 Cash Flow Hedging Interest Rate Swap Federal Home Loan Bank advances	Sep. 30, 2013 Cash Flow Hedging Interest Rate Swap Trust Preferred Securities	Sep. 30, 2013 Cash Flow Hedging Interest rate cap contract	Dec. 31, 2012 Cash Flow Hedging Interest rate cap contract	Sep. 30, 2013 Cash Flow Hedging Interest rate cap Trust Preferred Securities	Sep. 30, 2013 Not Designated as Hedging Instrument
Derivative [Line Items]
Number of interest rate derivatives held			5	5			1	1
Notional amount of interest rate derivatives			$ 56,000	$ 56,000	$ 30,000	$ 26,000	$ 13,000	$ 13,000	$ 13,000	$ 146,980
Number of debt instruments held		3
Estimated amount to be transferred from OCI to earnings	1,355
Termination value of derivatives in a net liability position	4,365
Derivative collateral posted	$ 4,271