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Summary of Significant Accounting Policies - Additional Information (Detail)
Share data in Millions, unless otherwise specified |
3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
USD ($)
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Mar. 31, 2013
USD ($)
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Dec. 31, 2012
USD ($)
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Mar. 31, 2013
Boa Vista Servicos S.A. [Member]
BRL
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Mar. 31, 2013
Fair Value, Measurements, Recurring [Member]
USD ($)
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Mar. 31, 2012
Fair Value, Measurements, Recurring [Member]
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| Significant Accounting Policies [Line Items] | |||||||||
| Antidilutive stock options excluded from computation of earnings per share | 0.1 | ||||||||
| Fair value of long term debt | $ 0 | $ 1,600,000,000 | $ 1,600,000,000 | ||||||
| Carrying value of long term debt | 0 | 1,500,000,000 | 1,500,000,000 | ||||||
| Fair value of interest rate swaps | 10,400,000 | 12,200,000 | 10,400,000 | [1] | |||||
| Interest rate swap term | 5 years | ||||||||
| Variable interest maximum exposure to loss | 15,500,000 | ||||||||
| Percentage of interest acquired in Boa Vista Servicos S.A. ("BVS") | 15.00% | ||||||||
| Investment in Boa Vista Servicos S.A. ("BVS") | $ 64,600,000 | $ 63,600,000 | 130,000,000 | ||||||
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| 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
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of voting equity interests acquired in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized. 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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