Assets And Liabilities Subject To Offsetting (Securities Sold Under Agreements To Repurchase Offsetting) (Details) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Assets And Liabilities Subject To Offsetting [Abstract]
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 19,243,000	[1]	$ 19,356,000	[1]
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	[1]	0	[1]
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	19,243,000	[1]	19,356,000	[1]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Financial Instruments	(19,243,000)	[1]	(19,356,000)	[1]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	0	[1]	0	[1]
Repurchase Agreements, Net Amount	0	[1]	0	[1]
Fair value of securities pledged	$ 23,718,000		$ 25,876,000

[1] As of March 31, 2013 and December 31, 2012, the fair value of securities pledged was $23,718,000 and $25,876,000, respectively.