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Fair Value Measurements and Other Financial Instruments - Carrying Amounts and Estimated Fair Values of Debt (Parenthetical) (Detail) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2017 | Dec. 31, 2016
Term Loan A Due July 2017 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt maturity month and year, Term loan | 2017-07 |
Term Loan A Due July 2019 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt maturity month and year, Term loan | 2019-07 | 2019-07
6.50% Senior Notes Due December 2020 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 6.50% | 6.50%
Debt maturity month and year, Senior notes | 2020-12 | 2020-12
4.875% Senior Notes due December 2022 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 4.875% | 4.875%
Debt maturity month and year, Senior notes | 2022-12 | 2022-12
5.25% Senior Notes Due April 2023 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 5.25% | 5.25%
Debt maturity month and year, Senior notes | 2023-04 | 2023-04
4.50% Senior Notes due September 2023 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 4.50% | 4.50%
Debt maturity month and year, Senior notes | 2023-09 | 2023-09
5.125% Senior Notes due December 2024 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 5.125% | 5.125%
Debt maturity month and year, Senior notes | 2024-12 | 2024-12
5.50% Senior Notes due September 2025 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 5.50% | 5.50%
Debt maturity month and year, Senior notes | 2025-09 | 2025-09
6.875% Senior Notes Due July 2033 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Debt interest rate | 6.875% | 6.875%
Debt maturity month and year, Senior notes | 2033-07 | 2033-07

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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