Derivatives And Risk Management (Interest Rate Swap Agreements) (Details) (Interest Rate Swap Agreements [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014 Caontracts	Dec. 31, 2013 Caontracts
2014 [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	2	2
Derivative, Notional Amount	$ 50,000	$ 50,000
Derivative, Maturity Date	Dec. 31, 2014	Dec. 31, 2014
2015 [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	3	2
Derivative, Notional Amount	60,000	45,000
Derivative, Maturity Date	Dec. 31, 2015	Dec. 31, 2015
2016 [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	3	2
Derivative, Notional Amount	60,000	40,000
Derivative, Maturity Date	Dec. 31, 2016	Dec. 31, 2016
2017 [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	2	1
Derivative, Notional Amount	30,000	15,000
Derivative, Maturity Date	Dec. 31, 2017	Dec. 31, 2017
2018 [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	5	4
Derivative, Notional Amount	$ 115,000	$ 95,000
Derivative, Maturity Date	Dec. 31, 2018	Dec. 31, 2018