Pension Liabilities (Schedule Of The Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Liabilities [Abstract]
Interest cost	$ 149,000	$ 195,000	$ 200,000
Amortization of prior service costs	304,000	304,000	304,000
Amortization of net gain	0	24,000
Net periodic benefit cost	453,000	523,000
Net (gain) loss	2,284,000	(504,000)
Amortization of prior service cost	(304,000)	(304,000)
Amortization of net gain		(24,000)
Total recognized in other comprehensive income	1,980,000	(832,000)
Total recognized in net periodic benefit costs and other comprehensive income	$ 2,433,000	$ (309,000)