Schedule of Debt Outstanding (Parenthetical) (Detail)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2012
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Revolving Credit Facility
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Debt Instrument [Line Items] | ||
Revolving Credit Facility maturity date | Dec. 31, 2017 | |
Weighted average rate | 1.70% | 1.70% |
Senior Notes interest payable dates | interest payable periodically at variable interest rates. | |
Senior Notes 4.625% Due 2023
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Debt Instrument [Line Items] | ||
Interest rate stated percentage of Senior Notes | 4.625% | |
Note maturity date | May 01, 2023 | |
Senior Notes interest payable dates | interest payable semi-annually in May and November at 4.625%. | |
Senior Notes 4.125% Due 2020
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Debt Instrument [Line Items] | ||
Interest rate stated percentage of Senior Notes | 4.125% | |
Note maturity date | Apr. 01, 2020 | |
Senior Notes interest payable dates | interest payable semi-annually in April and October at 4.125%. | |
Senior Notes 7.75% Due 2017
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Debt Instrument [Line Items] | ||
Interest rate stated percentage of Senior Notes | 7.75% | |
Note maturity date | Jun. 30, 2017 | |
Senior Notes interest payable dates | interest payable semi-annually in June and December at 7.75%. |