Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Long-Term Debt [Abstract]
Senior notes	$ 262,857	$ 203,572
Revolving credit facility	0	66,230
Capitalized lease and other obligations	1,617	1,415
Total long-term debt	264,474	271,217
Less: Current maturities	(37,331)	(37,130)
Total maturities due after one year	$ 227,143	$ 234,087

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount borrowed under the credit facility as of the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

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Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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