Derivative Financial Instruments (Details) (USD $)	1 Months Ended						3 Months Ended		6 Months Ended								3 Months Ended		6 Months Ended
	Feb. 28, 2010	Nov. 30, 2008	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Non-designated hedging instruments Risk Management Interest rate cap contracts	Dec. 31, 2012 Non-designated hedging instruments Risk Management Interest rate cap contracts	Jun. 30, 2013 Non-designated hedging instruments Risk Management Gain on state tax credits, net Interest rate cap contracts	Jun. 30, 2012 Non-designated hedging instruments Risk Management Gain on state tax credits, net Interest rate cap contracts	Jun. 30, 2013 Non-designated hedging instruments Risk Management Gain on state tax credits, net Interest rate cap contracts	Jun. 30, 2012 Non-designated hedging instruments Risk Management Gain on state tax credits, net Interest rate cap contracts	Jun. 30, 2013 Non-designated hedging instruments Risk Management Other Assets Interest rate cap contracts	Dec. 31, 2012 Non-designated hedging instruments Risk Management Other Assets Interest rate cap contracts	Jun. 30, 2013 Non-designated hedging instruments Risk Management Other Liabilities Interest rate cap contracts	Dec. 31, 2012 Non-designated hedging instruments Risk Management Other Liabilities Interest rate cap contracts	Jun. 30, 2013 Non-designated hedging instruments Client-Related Interest rate swap contracts	Dec. 31, 2012 Non-designated hedging instruments Client-Related Interest rate swap contracts	Jun. 30, 2013 Non-designated hedging instruments Client-Related Interest and fees on loans Interest rate swap contracts	Jun. 30, 2012 Non-designated hedging instruments Client-Related Interest and fees on loans Interest rate swap contracts	Jun. 30, 2013 Non-designated hedging instruments Client-Related Interest and fees on loans Interest rate swap contracts	Jun. 30, 2012 Non-designated hedging instruments Client-Related Interest and fees on loans Interest rate swap contracts	Jun. 30, 2013 Non-designated hedging instruments Client-Related Other Assets Interest rate swap contracts	Dec. 31, 2012 Non-designated hedging instruments Client-Related Other Assets Interest rate swap contracts	Jun. 30, 2013 Non-designated hedging instruments Client-Related Other Liabilities Interest rate swap contracts	Dec. 31, 2012 Non-designated hedging instruments Client-Related Other Liabilities Interest rate swap contracts
Derivative [Line Items]
Unrealized Gain Derivative Instruments			$ 800,000
Derivative, Collateral, Right to Reclaim Cash			2,100,000	3,300,000
Amount Paid to Enter Into a Series of Interest Rate Caps	751,000	2,100,000
Summary of Derivative Instruments [Abstract]
Notional Amount					34,050,000	49,050,000									119,129,000	126,962,000
Asset Derivatives, Fair Value											23,000	13,000									797,000	1,741,000
Liability Derivatives, Fair Value													0	0									836,000	1,979,000
Amount of Gain or (Loss) Recognized in Operations on Derivative							$ 11,000	$ (39,000)	$ 10,000	$ (65,000)							$ (68,000)	$ (110,000)	$ (173,000)	$ (251,000)