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Subsequent Events - Additional Information (Detail) (USD $) |  |  |  | 0 Months Ended |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Incremental Facility [Member] | Feb. 03, 2014 Subsequent Event [Member] | Jan. 10, 2014 Subsequent Event [Member] | Feb. 03, 2014 Subsequent Event [Member] Incremental Facility [Member] | Feb. 03, 2014 Subsequent Event [Member] Senior Credit Facility [Member] | Jan. 10, 2014 5 3/8% Senior Notes due [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount of Senior Notes | $ 1,938,802,000 | $ 2,160,854,000 |  |  |  |  |  | $ 510,000,000
Proceeds received on 5 3/8% Senior Subordinated Notes |  |  |  |  | 502,300,000 |  |  |
Interest rate on convertible notes |  |  |  |  |  |  |  | 5.375%
Increase in revolving line of credit Facility | $ 250,000,000 |  | $ 300,000,000 | $ 400,000,000 |  | $ 500,000,000 |  |
Amended and restated date |  |  |  | Feb. 09, 2012 |  |  | Feb. 03, 2014 |
Revolving credit facility maturity date |  |  |  | Feb. 02, 2019 |  |  |  |

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