Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Long-term debt
Total debt	$ 910,182	$ 935,182
Less: current portion of long-term debt	(18,750)	(25,000)
Total long-term debt	891,432	910,182
Senior Subordinated Notes [Member]
Long-term debt
Senior notes, noncurrent	325,000	325,000
Term Loan A, maturing August 17, 2015 [Member] \| Credit Agreement [Member]
Long-term debt
Total debt	118,750	143,750
Term Loan B, maturing August 17, 2016 [Member] \| Credit Agreement [Member]
Long-term debt
Total debt	$ 466,432	$ 466,432

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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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), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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