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Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2007
Debt Instrument [Line Items]      
Long term debt $ 35,752 $ 36,062  
Defeased Debt
     
Debt Instrument [Line Items]      
Long term debt 26,676 26,818 29,300
Community Development District Debt
     
Debt Instrument [Line Items]      
Long term debt $ 9,076 $ 9,244