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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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-Name Regulation S-X (SX)

-Number 210

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-Topic 840

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

-Publisher FASB

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-Topic 944

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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Long-Term Debt--Components of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended			3 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 9.875% Senior Notes due 2020	Dec. 31, 2013 9.875% Senior Notes due 2020	Mar. 31, 2014 9.875% Senior Notes due 2020 Senior Notes	Mar. 31, 2014 8.25% Senior Notes due 2021	Dec. 31, 2013 8.25% Senior Notes due 2021	Mar. 31, 2014 8.25% Senior Notes due 2021 Senior Notes	Mar. 31, 2014 7.625% Senior Notes due 2022	Dec. 31, 2013 7.625% Senior Notes due 2022	Mar. 31, 2014 7.625% Senior Notes due 2022 Senior Notes	Mar. 31, 2014 Minimum Mortgages	Mar. 31, 2014 Minimum Secured Debt	Mar. 31, 2014 Maximum Mortgages	Mar. 31, 2014 Maximum Secured Debt
Long-term debt [Abstract]
Senior Notes			$ 294,695	$ 294,556		$ 400,000	$ 400,000		$ 555,501	$ 555,719
Senior secured revolving credit facility	319,000	272,000
Real estate mortgage notes payable	11,081	11,202
Installment notes payable	5,178	5,235
Capital lease obligations	23,579	24,150
Total long-term debt and capital lease obligations	1,609,034	1,562,862
Less current maturities	5,502	5,334
Long-term debt and capital leases, less current maturities	1,603,532	1,557,528
Stated interest rate					9.875%			8.25%			7.625%	2.54%	2.85%	5.46%	5.99%
Maturity date (year)					2020			2021			2022
Maturity date (month and year)												2021-08	2014-04	2028-12	2018-02
Unamortized discount			5,304	5,444
Unamortized premium									$ 5,501	$ 5,719