Employee Benefit Plans (Schedule Of Liabilities Recorded) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	$ 112	$ 165
Noncurrent liabilities	590	685
Total liability at December 31	702	850
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	36	91
Noncurrent liabilities	510	431
Total liability at December 31	$ 546	$ 522