Derivatives And Hedging (Narrative) (Details)	1 Months Ended	12 Months Ended
	May. 31, 2015 USD ($) derivative_contract	Dec. 31, 2015 USD ($) derivative_contract	Dec. 31, 2014 USD ($) derivative_contract	Dec. 31, 2013 USD ($)
Derivatives, Fair Value [Line Items]
Gain on cash flow hedge	$ 5,000,000	$ 5,007,000	$ 0	$ 5,893,000
Accumulated other comprehensive loss		(7,644,000)	(12,436,000)	(4,202,000)
Gain (Loss) On Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss		$ 8,160,000	$ 3,416,000	$ 1,233,000
Interest Rate Contracts [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts | derivative_contract	2	3	1
Notional amount of interest rate fair value hedge derivatives	$ 215,000,000	$ 200,000,000	$ 5,180,000
Derivative, lower fixed interest rate range		1.492%
Derivative, fixed interest rate			2.445%
Cash flow hedge gain (loss) to be amortized within 12 months		$ (900,000)
Interest Rate Contracts [Member] | Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts | derivative_contract		2	2
Notional amount of interest rate fair value hedge derivatives		$ 63,726,968	$ 65,278,286
Derivative, fixed interest rate		7.50%	7.50%
Derivative, lower variable interest rate range		4.41%	4.24%
Derivative, higher variable interest rate range		4.44%	4.27%
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, swap rate period (In years)	10 years
Derivative, forward interest rate	2.00%