Debt (Parenthetical) (Detail)
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9 Months Ended | 12 Months Ended |
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Sep. 30, 2012
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Dec. 31, 2011
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Secured Promissory Notes [Member]
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Line of Credit Facility [Line Items] | ||
Average interest rate | 2.85% | 4.34% |
Other Indebtedness [Member]
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Line of Credit Facility [Line Items] | ||
Variable and fixed interest rates ranging, minimum | 5.00% | |
Variable and fixed interest rates ranging, maximum | 8.00% | |
Term Loan Facility [Member] | Senior Secured Credit Facility [Member]
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Line of Credit Facility [Line Items] | ||
Average interest rate | 4.22% | 6.50% |
Revolving Credit Facility [Member] | Senior Secured Credit Facility [Member]
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Line of Credit Facility [Line Items] | ||
Average interest rate | 6.25% |