Derivative Instruments And Hedging Activities , Balance Sheet Location (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 0
Liability Derivatives	459,000	1,106,000
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Collateral deposits recorded in other assets	1,200,000	3,100,000
Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 459,000	$ 1,106,000