Derivative Financial Instruments (Net Impact On Interest Expense Related To Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, Interest Expense	$ 1,542	$ 1,113	$ 656
Cash flow hedges, Realized Deferred Loss (Gain)	2,727	1,146	(139)
Cash flow hedges, Net Impact	4,269	2,259	517
Interest Rate Swaps On FHLB Advances [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, Interest Expense	1,542	1,113	656
Cash flow hedges, Realized Deferred Loss (Gain)	1,962	1,476	984
Cash flow hedges, Net Impact	3,504	2,589	1,640
Interest Rate Swaps On Subordinated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, Realized Deferred Loss (Gain)	(150)	(150)	(227)
Cash flow hedges, Net Impact	(150)	(150)	(227)
Interest Rate Swaps On Repurchase Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, Realized Deferred Loss (Gain)	1,095
Cash flow hedges, Net Impact	1,095
Interest Rate Swaps On Trust Preferred Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges, Realized Deferred Loss (Gain)	(180)	(180)	(896)
Cash flow hedges, Net Impact	$ (180)	$ (180)	$ (896)