Derivatives And Hedging (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 contracts	Dec. 31, 2011 contracts
Derivative [Line Items]
Accumulated other comprehensive loss from derivative instruments	$ 7,489,000	$ 10,016,000
Interest Rate Contracts [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Number of active interest rate contracts held	3	3
Notional amount of interest rate cash flow hedge derivatives	26,500,000	27,100,000
Derivative maturity date	Sep. 15, 2017	Sep. 15, 2017
Derivative, lower fixed interest rate range	2.30%	2.30%
Derivative, higher fixed interest rate range	5.00%	5.00%
Cash flow hedge gain (loss) to be amortized within 12 months	(2,900,000)
Interest Rate Contracts [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Number of active interest rate contracts held	4	4
Derivative maturity date	Oct. 15, 2017	Oct. 15, 2017
Notional amount of interest rate fair value hedge derivatives	$ 118,100,000	$ 119,300,000
Derivative, lower fixed interest rate range	4.20%	4.20%
Derivative, higher fixed interest rate range	7.50%	7.50%
Derivative, lower variable interest rate range	0.30%	0.50%
Derivative, higher variable interest rate range	4.30%	4.40%