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Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]    
Prepaid land lease $ 3,468 $ 3,541
Seller financed notes receivable 733 26
Other assets $ 4,201 $ 3,567