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Notes Redemption Prices for Future year (Detail)
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9 Months Ended |
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Sep. 30, 2013
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Senior Notes Redeemed During Twelve Months Beginning February 1, 2018
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| Debt Instrument [Line Items] | |
| Percentage of Principal Amount of Notes | 102.375% |
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Senior Notes Redeemed During Twelve Months Beginning February 1, 2019
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| Debt Instrument [Line Items] | |
| Percentage of Principal Amount of Notes | 101.583% |
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Senior Notes Redeemed During Twelve Months Beginning February 1, 2020
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| Debt Instrument [Line Items] | |
| Percentage of Principal Amount of Notes | 100.792% |
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Senior Notes Redeemed During Twelve Months Beginning February 1, 2021
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| Debt Instrument [Line Items] | |
| Percentage of Principal Amount of Notes | 100.00% |