Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Entities (Details)

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Investments in Unconsolidated Entities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted $ 13,456 $ 13,462
Repayment Guarantees [Member]
    
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted 213 219
Completion Guarantees [Member]
    
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted 0 [1] 0 [1]
South Edge Guarantee [Member]
    
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted $ 13,243 [2] $ 13,243 [2]
[1] (1)As our completion guarantees are typically backed by funding from a third party, we do not believe these guarantees represent a potential cash obligation for us, as they require only non-financial performance.
[2] (2)As discussed in Note 13, we dispute the enforceability of this guarantee, and ultimate resolution of this matter will be addressed through litigation and/or settlements.