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Long-term Debt Schedule (Detail) (USD $)
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Sep. 30, 2012
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Dec. 31, 2011
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| Debt Instrument [Line Items] | ||
| U.S. dollar amount outstanding under the Credit facility | $ 500,000,000 | $ 202,000,000 |
| Capital leases | 200,000 | 1,400,000 |
| Other debt | 200,000 | 200,000 |
| Total | 500,400,000 | 203,600,000 |
| Less: current portion | 50,384,000 | 1,542,000 |
| Long-term portion | 450,053,000 | 202,079,000 |
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New Senior Secured Revolving Credit
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| Debt Instrument [Line Items] | ||
| U.S. dollar amount outstanding under the Credit facility | $ 500,000,000 | $ 202,000,000 |
| X | ||||||||||
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- Definition
Long-term debt and capital lease obligations current and noncurrent. No definition available.
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount borrowed under the credit facility as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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