Derivative Financial Instruments (Fair Value Of Derivative Financial Instruments Designated As Fair Value Hedges) (Details) (Interest Rate Swaps On FHLB Advances [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Interest Rate Swaps On FHLB Advances [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges, Consolidated Balance Sheet Location	Other assets
Fair value hedges, Number of Instruments		1
Fair value hedges, Notional Amount		$ 100,000
Fair value hedges, Estimated Fair Value		$ 61