Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt instrument carrying amount	$ 1,708,625
Lease finance obligations	280,909	$ 3,904
Capital lease obligations (Note 9)	8,159
Long term debt and lease obligations gross	1,997,693	383,904
Unamortized debt discount and debt issuance costs	(46,022)	(9,001)
Long-term debt and lease obligation	1,951,671	374,903
Current maturities of long-term debt and lease obligations	29,153	30,074
Long-term debt and lease obligations, net of current maturities	1,922,518	344,829
2021 notes
Debt Instrument [Line Items]
Debt instrument carrying amount	350,000	350,000
2023 notes
Debt Instrument [Line Items]
Debt instrument carrying amount	700,000
2015 term loan
Debt Instrument [Line Items]
Debt instrument carrying amount	598,625
2013 facility
Debt Instrument [Line Items]
Long-term debt		$ 30,000
2015 facility
Debt Instrument [Line Items]
Long-term debt	$ 60,000

Amount of capital lease obligations with initial maturities beyond one year or the normal operating cycle, if longer.

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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 lease obligations.

+ References

No definition available.

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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 and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date for lease finance obligations.

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No definition available.

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

+ References

No definition available.

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

+ References

No definition available.

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Amount of long-term debt and lease obligations 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 ,other types of debt, and lease obligations, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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

+ References

No definition available.

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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.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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