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Subsequent Events (Details)
$ in Millions
Jul. 20, 2015
USD ($)
Jul. 01, 2015
USD ($)
lot
Jun. 23, 2015
Jul. 31, 2012
Subsequent Event [Line Items]        
Stated interest rate (percent)     6.00%  
Subsequent Event [Member] | Bonterra [Member]        
Subsequent Event [Line Items]        
Total consideration   $ 101.3    
Potential earn-out   6.0    
Target earn-out   6.0    
Portion of aggregate consideration held back   $ 0.8    
Number of primary residential lots | lot   1,700    
7.50% Senior Exchange Convertible Notes [Member] | Senior Exchange Convertible Debt [Member]        
Subsequent Event [Line Items]        
Stated interest rate (percent)       7.50%
7.50% Senior Exchange Convertible Notes [Member] | Senior Exchange Convertible Debt [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Redemption of aggregate principal amount $ 8.5