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Summary of Significant Accounting Policies (Details 2) (USD $)
12 Months Ended
Dec. 31, 2011
Summary of assets and liabilities of Lealand  
Proceeds from sale of property which is classified as held-for-sale $ 11,370,000
Gain on sale of investment which is classified as held-for-sale 430,000
Lealand Place
 
Summary of assets and liabilities of Lealand  
Proceeds from sale of property which is classified as held-for-sale 11,400,000
Gain on sale of investment which is classified as held-for-sale $ 430,000