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Notes Receivable and Allowance for Losses Summary Of Activity Related To Allowance For Losses (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Forgivable Notes Receivable [Member]
Sep. 30, 2014
Mezzanine & Other Notes Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]        
Beginning balance $ 12,416 $ 11,546 $ 1,650 $ 9,896
Provisions     1,253 102
Recoveries     (208) (80)
Write-offs     (217) 0
Other     20 [1] 0
Ending balance $ 12,416 $ 11,546 $ 2,498 $ 9,918
[1] Consists of default rate assumption changes