Long-Term Debt - Summary of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,612,438us-gaap_DebtInstrumentCarryingAmount	$ 1,657,975us-gaap_DebtInstrumentCarryingAmount
Long-term debt	1,612,438us-gaap_DebtInstrumentCarryingAmount	1,657,975us-gaap_DebtInstrumentCarryingAmount
Less discounts	(8,985)	(11,394)
Less current maturities	(14,050)us-gaap_LongTermDebtCurrent	(14,050)us-gaap_LongTermDebtCurrent
Total long-term debt, net of current maturities	1,589,403us-gaap_LongTermDebtNoncurrent	1,632,531us-gaap_LongTermDebtNoncurrent
Term B-2 Loans [Member]
Debt Instrument [Line Items]
Long-term debt	1,352,438	1,397,975
Long-term debt	1,352,438	1,397,975
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	260,000	260,000
Long-term debt	260,000	260,000
Less discounts	$ (1,369)	$ (2,083)

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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

-Publisher SEC

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-Section S99

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

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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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

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