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v3.19.3

Long-term Debt - Long-Term Debt (Parenthetical) (Detail) | Sep. 30, 2019 | Dec. 31, 2018 | Jan. 28, 2016 | Jan. 10, 2014 | Oct. 30, 2012 | Feb. 09, 2012
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5 7/8% Senior Subordinated Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on senior notes |  |  |  |  |  | 5.875%
5% Senior Subordinated Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on senior notes | 5.00% | 5.00% |  |  | 5.00% |
5 3/8% Senior Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on senior notes | 5.375% | 5.375% |  | 5.375% |  |
5 3/4% Senior Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on senior notes | 5.75% | 5.75% | 5.75% |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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