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Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Parenthetical) (Detail) | Dec. 31, 2017 | Mar. 10, 2017 | Dec. 31, 2016 | May 09, 2013 | Jul. 02, 2012
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7.0% Senior Subordinated Notes due 2022 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Stated interest rate on debt agreement | 7.00% |  | 7.00% |  | 7.00%
5.0% Senior Subordinated Notes due 2023 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Stated interest rate on debt agreement | 5.00% |  | 5.00% | 5.00% |
6.125% Senior Subordinated Notes due 2027 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Stated interest rate on debt agreement | 6.125% | 6.125% | 6.125% |  |

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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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- Definition 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. + References No definition available. + Details
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