Derivatives And Hedging (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Gain on cash flow hedge	$ 0	$ 5,893,000	$ 0
Accumulated other comprehensive loss	(12,436,000)	(4,202,000)	(24,743,000)
Gain (Loss) On Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss	3,416,000	1,233,000	(7,489,000)
Interest Rate Contracts [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts	1	3
Derivative, maturity date	Dec. 23, 2015	Sep. 15, 2017
Notional amount of interest rate fair value hedge derivatives	5,200,000	25,800,000
Derivative, fixed interest rate	2.40%
Derivative, lower fixed interest rate range		2.30%
Derivative, higher fixed interest rate range		5.00%
Cash flow hedge gain (loss) to be amortized within 12 months	(800,000)
Interest Rate Contracts [Member] | Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts	2	4
Derivative, maturity date	Oct. 15, 2017	Oct. 15, 2017
Notional amount of interest rate fair value hedge derivatives	65,300,000	116,700,000
Derivative, fixed interest rate	7.50%
Derivative, lower fixed interest rate range		4.20%
Derivative, higher fixed interest rate range		7.50%
Derivative, lower variable interest rate range	4.20%	0.20%
Derivative, higher variable interest rate range	4.30%	4.30%
Forward-Starting Contracts [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts		3
Notional amount of interest rate fair value hedge derivatives		150,000,000
Derivative, swap rate period (In years)		10 years
Derivative, forward interest rate		2.40%
Cash received on cash flow hedge		$ 6,100,000