Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Overlook Ridge, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Overlook Ridge, L.L.C.) (Narrative) (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Oct. 23, 2012
Schedule of Equity Method Investments [Line Items]    
Maximum borrowing capacity $ 600,000,000  
Overlook Ridge, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of interest in venture   50.00%
Notional land capital 20,000,000  
Percentage of notional land capital account assigned 3.00%  
Mortgage loan 17,400,000  
Mortgage loans, carrying amount $ 16,200,000  
Spread over LIBOR 3.50%  
Mortgage loan, maturity date March 2014  
Loan extension period 1 year  
Extension fee 0.25%  
Holding and distribution pattern under operating agreement The operating agreement of Overlook Ridge provides, among other things, for the distribution of net cash flow to the members, as follows:First, to the members in proportion to their unrecovered capital percentages, as defined, until the cumulative amounts distributed equal such member's return of six percent on the unrecovered capital; andSecond, to the members in accordance with their ownership percentages.  
Overlook Ridge, L.L.C. [Member] | Rowe [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of notional land capital account assigned 97.00%  
Maximum [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of interest in venture 80.00%  
Maximum [Member] | Overlook Ridge, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of operating return on capital 6.00%