Borrowed Funds (Schedule Of Federal Home Loan Bank Advances) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Borrowed Funds [Abstract]
Amount, Maturity, 91 days through 365 days	$ 225,000
Amount, Maturity, 1 - 2 years		550,000
Amount, Maturity	$ 225,000	$ 550,000
Weighted Average Interest Rate, Maturity, 91 days through 365 days	2.08%
Weighted Average Interest Rate, Maturity, 1 - 2 years		4.43%
Weighted Average Interest Rate, Maturity	2.08%	4.43%