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Summary of Significant Accounting Policies - Additional Information (Detail)
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9 Months Ended | ||
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Sep. 30, 2013
USD ($)
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Dec. 31, 2012
USD ($)
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Sep. 30, 2013
Boa Vista Servicos S.A. [Member]
BRL
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| Significant Accounting Policies [Line Items] | |||
| Fair value of long term debt | $ 1,500,000,000 | $ 1,600,000,000 | |
| Carrying value of long term debt | 1,400,000,000 | 1,500,000,000 | |
| Fair value of interest rate swaps | 7,400,000 | 12,200,000 | |
| Interest rate swap term | 5 years | ||
| Variable interest maximum exposure to loss | 24,300,000 | ||
| Percentage of interest acquired in Boa Vista Servicos S.A. (BVS) | 15.00% | ||
| Investment in Boa Vista Servicos S.A. (BVS) | $ 57,700,000 | $ 63,600,000 | 130,000,000 |
| X | ||||||||||
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- Definition
Long Term Debt, Carrying Amount No definition available.
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| X | ||||||||||
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- Definition
Maturity Of Interest Rate Swaps No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. No definition available.
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| X | ||||||||||
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- Definition
The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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