Stockholders' Equity (Summary Of Changes In Stockholders' Equity) (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Stockholders' Equity [Line Items]
Balance	$ 336,540,000
Net Loss	(3,217,000)		1,653,000	18,532,000
Common Stock Dividends	(1,850,000)	[1]
Unrealized Foreign Currency Translation Gain	(25,000)		40,000
Net Change in Fair Value of Derivatives	9,000		547,000
Net Change in Funding Status of Defined Benefit Plan	175,000		311,000
Stock-based compensation expense	447,000
Balance	330,774,000			336,540,000
Accrued dividends not paid	36,000
Preferred Stock [Member]
Stockholders' Equity [Line Items]
Preferred Stock Dividends	$ (1,305,000)

[1] Includes $36,000 of accrued dividends not paid