Debt (Schedule Of Long-Term Debt) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total debt	$ 207,803,000	$ 207,163,000
Less current maturities	1,093,000	417,000
Total long-term debt	206,710,000	206,746,000
Senior Subordinated 8% Notes [Member]
Debt Instrument [Line Items]
Total debt	202,702,000	202,323,000
Senior Subordinated Notes, interest rate	8.00%
Unamortized discount	1,298,000	1,677,000
Other Debt [Member]
Debt Instrument [Line Items]
Total debt	$ 5,101,000	$ 4,840,000