| 
           Commitments and Contingencies (Details Textual) (USD $) 
         | 
        0 Months Ended | 1 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Dec. 09, 2010
 
          lender 
         | 
        
           Mar. 31, 2012 
         | 
        
           Sep. 30, 2013 
         | 
        
           Jun. 30, 2013 
         | 
        
           Dec. 31, 2012 
         | 
        
           Sep. 30, 2012 
         | 
        
           Jun. 30, 2012 
         | 
        
           Dec. 31, 2011 
         | 
        
           Sep. 30, 2013
 
          South Edge guarantee [Member] 
         | 
        
           Jun. 06, 2011
 
          South Edge guarantee [Member] 
         | 
        
           Oct. 26, 2011
 
          South Edge [Member]
 
          JointVenture 
         | 
        
           Sep. 30, 2013
 
          Summary Judgment Excluding Interest [Member] [Member] 
         | 
        
           Sep. 30, 2013
 
          Summary Judgment Including Interest [Member] [Member] 
         | 
        
           Sep. 30, 2013
 
          Summary Judgment Interest [Member] 
         | 
      |
| Loss Contingencies [Line Items] | ||||||||||||||
| Reserved for litigation and asserted claims | $ 16,807,000 | $ 16,067,000 | ||||||||||||
| Joint venture ownership percentage | 3.53% | |||||||||||||
| Springing Repayment Guarantee_Original demand Letter | 13,200,000 | |||||||||||||
| Number of co-ventures in joint venture | 4 | |||||||||||||
| Litigation Judgment Amount | 15,053,857 | 15,753,344 | 699,487 | |||||||||||
| Supersedeas Bond | 16,050,604 | |||||||||||||
| Commitments and Contingencies (Textual) [Abstract] | ||||||||||||||
| Warranty reserve | 22,257,000 | 21,844,000 | 22,064,000 | 22,973,000 | 21,243,000 | 23,136,000 | ||||||||
| Number of lenders filing petition for involuntary bankruptcy | 3 | |||||||||||||
| Amount requested in demand for arbitration related to alleged breaches | 13,500,000 | |||||||||||||
| Additional amount requested in demand for arbitration related to pro rata future infrastructure improvement costs subsequently dismissed | $ 9,800,000 | |||||||||||||