Annual report pursuant to Section 13 and 15(d)

Investments in Unconsolidated Entities (Details)

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Investments in Unconsolidated Entities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Jun. 06, 2011
Guarantor Obligations [Line Items]      
Maximum pro rata exposure under the guarantee $ 13,462 $ 13,589  
Repayment guarantees [Member]
      
Guarantor Obligations [Line Items]      
Maximum pro rata exposure under the guarantee 219 346  
Completion guarantees [Member]
      
Guarantor Obligations [Line Items]      
Maximum pro rata exposure under the guarantee 0 [1] 0 [1]  
South Edge guarantee [Member]
      
Guarantor Obligations [Line Items]      
Maximum pro rata exposure under the guarantee $ 13,243 [2] $ 13,243 [2] $ 13,200
[1] As our completion guarantees are typically backed by funding from a third party, we believe these guarantees do not represent a potential cash obligation for us, as they require only non-financial performance.
[2] As discussed in Note 13, although we have a reserve for the amounts we believe are appropriate, we dispute the enforceability of this guarantee, and ultimate resolution of this matter will be addressed through litigation and/or arbitration.