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Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
Senior notes $ 145,000us-gaap_SeniorNotes $ 155,714us-gaap_SeniorNotes
Revolving credit facility 0us-gaap_LineOfCredit 0us-gaap_LineOfCredit
Capital Lease Obligations 3,552us-gaap_CapitalLeaseObligations 0us-gaap_CapitalLeaseObligations
Total long-term debt 148,552us-gaap_DebtAndCapitalLeaseObligations 155,714us-gaap_DebtAndCapitalLeaseObligations
Less: Current maturities (27,956)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent (35,714)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Total maturities due after one year $ 120,596us-gaap_LongTermDebtAndCapitalLeaseObligations $ 120,000us-gaap_LongTermDebtAndCapitalLeaseObligations