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Schedule of Long-Term Debt (Detail) (USD $)
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Dec. 31, 2012
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Oct. 24, 2012
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Dec. 31, 2011
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Jun. 10, 2011
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| Debt Instrument [Line Items] | ||||||||
| Debt premiums, net of amortization | $ 17,611,000 | |||||||
| Total long-term debt | 1,087,611,000 | [1] | 717,000,000 | [1] | ||||
| Current maturities of long-term debt | ||||||||
| Long-term debt, less current maturities | 1,087,611,000 | 717,000,000 | ||||||
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8.50% Senior Notes, due June 2019
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| Debt Instrument [Line Items] | ||||||||
| Long-term Debt unsecured | 900,000,000 | 300,000,000 | 600,000,000 | 600,000,000 | ||||
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Revolving Bank Credit Facility Due May 2015
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| Debt Instrument [Line Items] | ||||||||
| Long-term debt secured | $ 170,000,000 | $ 117,000,000 | ||||||
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of long-term debt, net of 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Debt Discount Premium Net Of Amortization No definition available.
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