Commitments And Contingencies (Schedule Of Estimated Unreported Loss Liability And Any Related Recoverable Insurance Amounts) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Commitments And Contingencies [Abstract]
Short-term liability	$ 952	$ 1,030
Long-term liability	919	960
Total liability	1,871	1,990
Short-term recoverable	296	350
Long-term recoverable	360	350
Total recoverable	656	700
Total net unreported loss liability	$ 1,215	$ 1,290