Derivative Financial Instruments (Balance Sheet Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amount	$ 40,139	$ 26,445
Asset Derivative, Fair Value	576	269
Liability Derivative, Notional Amount	62,439	52,308
Liability Derivative, Fair Value	2,653	2,125
Derivatives designated in cash flow hedging relationships | Interest rate swap | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amount	0	0
Asset Derivative, Fair Value	0	0
Derivatives designated in cash flow hedging relationships | Interest rate swap | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative, Notional Amount	30,000	30,000
Liability Derivative, Fair Value	2,349	1,834
Derivatives not designated as hedging instruments: | Forward Sale Agreements | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amount	22,167	22,220
Asset Derivative, Fair Value	137	135
Derivatives not designated as hedging instruments: | Forward Sale Agreements | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative, Notional Amount	25,484	15,287
Liability Derivative, Fair Value	174	124
Derivatives not designated as hedging instruments: | Written Interest Rate Options (Locks) | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Amount	17,972	4,225
Asset Derivative, Fair Value	439	134
Derivatives not designated as hedging instruments: | Written Interest Rate Options (Locks) | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative, Notional Amount	6,955	7,021
Liability Derivative, Fair Value	$ 130	$ 167