Derivative Financial Instruments (Income Statement Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative [Line Items]
Amount of pre-tax gain (loss) reclassified from AOCI into earnings (Effective Portion)	$ 326	$ 90	$ 471	$ 231
Derivatives designated in cash flow hedging relationships | Interest rate swap
Derivative [Line Items]
Amount of pre-tax gain (loss) recognized in OCI (Effective Portion)	(457)	(2,001)	(1,269)	(2,908)
Derivatives designated in cash flow hedging relationships | Interest rate swap | Interest on junior subordinated debt
Derivative [Line Items]
Amount of pre-tax gain (loss) reclassified from AOCI into earnings (Effective Portion)	(153)	(169)	(450)	(362)
Derivatives not designated as hedging instruments: | Forward Sale Agreements | Mortgage banking income
Derivative [Line Items]
Amount of pre-tax gain (loss) reclassified from AOCI into earnings (Effective Portion)	(341)	(28)	(392)	137
Derivatives not designated as hedging instruments: | Written Interest Rate Options (Locks) | Mortgage banking income
Derivative [Line Items]
Amount of pre-tax gain (loss) reclassified from AOCI into earnings (Effective Portion)	$ 667	$ 118	$ 863	$ 94