Debt - Debt (Parenthetical) (Detail)
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12 Months Ended | |||||
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Dec. 31, 2012
Secured Promissory Notes [Member]
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Dec. 31, 2011
Secured Promissory Notes [Member]
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Dec. 31, 2012
Other Indebtedness [Member]
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Dec. 31, 2012
Senior Secured Credit Facility [Member]
Term Loan Facility [Member]
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Dec. 31, 2011
Senior Secured Credit Facility [Member]
Term Loan Facility [Member]
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Dec. 31, 2012
Senior Secured Credit Facility [Member]
Revolving Credit Facility [Member]
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Line of Credit Facility [Line Items] | ||||||
Average interest rate | 2.80% | 4.34% | 4.21% | 6.50% | 4.75% | |
Variable and fixed interest rates ranging, minimum | 0.24% | |||||
Variable and fixed interest rates ranging, maximum | 8.00% |