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Cash and Cash Equivalents (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted cash $ 5,084 $ 7,872
Outstanding letters of credit and housing deposits from customers 3,610  
Escrow funds 949  
Deposits of housing contracts from customers $ 525