Derivative Financial Instruments (Fair Value Of Derivative Financial Instruments Designated As Cash Flow Hedges) (Details) (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]
Interest rate derivatives designated as hedges of cash flow, Consolidated Balance Sheet Location	Other liabilities
Interest rate derivatives designated as hedges of cash flow, Number of Instruments	1	1
Interest rate derivatives designated as hedges of cash flow, Notional Amount	$ 100,000	$ 100,000
Interest rate derivatives designated as hedges of cash flow, Estimated Fair Value	(1,521)	(2,050)
Forward Settle Interest Rate Swap On Anticipated Debt One [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate derivatives designated as hedges of cash flow, Consolidated Balance Sheet Location	Other liabilities
Interest rate derivatives designated as hedges of cash flow, Number of Instruments	4	1
Interest rate derivatives designated as hedges of cash flow, Notional Amount	200,000	100,000
Interest rate derivatives designated as hedges of cash flow, Estimated Fair Value	(15,050)	(4,158)
Forward Settle Interest Rate Swap On Anticipated Debt Two [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate derivatives designated as hedges of cash flow, Consolidated Balance Sheet Location	Other assets
Interest rate derivatives designated as hedges of cash flow, Number of Instruments	0	1
Interest rate derivatives designated as hedges of cash flow, Notional Amount		100,000
Interest rate derivatives designated as hedges of cash flow, Estimated Fair Value		$ 186