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Variable Interest Entities - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2013
Entity
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of primary beneficiary 1
Liabilities related to VIE $ 1,342,000
Assets related to VIE 0
Contributed to VIE 0
Number of primary beneficiary variable interest entity accounted under equity method investment 3
Total assets of developed and under developed real estate 11,187,000
Total liabilities of developed and under developed real estate 44,414,000
Current maturities 27,868,000
Investment in VIEs 140,000
Contributed to VIEs 74,000
Maximum Exposure to loss related to VIEs $ 3,764,000