Other Postretirement Benefits (Amounts Recognized In The Consolidated Financial Statements) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued post retirement liability, Current portion	$ (402,000)	$ (435,000)	$ (351,000)
Accrued post retirement liability, Long term portion	(2,076,000)	(2,218,000)	(2,379,000)
Net amount recognized	(2,555,000)	(2,766,000)	(3,138,000)
Unamortized Post-Retirement Health Care Costs [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued post retirement liability, Current portion	(322,000)	(303,000)	(292,000)
Accrued post retirement liability, Long term portion	(5,632,000)	(4,817,000)	(4,909,000)
Pre-tax accumulated other comprehensive loss - unamortized post-retirement healthcare costs	2,329,000	1,540,000	1,743,000
Net amount recognized	$ (3,625,000)	$ (3,580,000)	$ (3,458,000)