Consolidated Variable Interest Entity (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Variable Interest Entity [Line Items]    
Payable pursuant to tax receivable agreement $ 258.1 $ 201.8
The San Francisco Venture    
Variable Interest Entity [Line Items]    
Distributions (percent) 99.00%  
Variable Interest Entity, Primary Beneficiary | The San Francisco Venture    
Variable Interest Entity [Line Items]    
Combined assets $ 1,050.6 1,134.2
Inventories 1,047.2 1,080.1
Related party assets 0.1 30.1
Cash 1.6 22.1
Combined liabilities 259.8 250.4
Related party liabilities 177.4 167.6
Notes payable 65.1 65.1
Variable Interest Entity, Primary Beneficiary | Five Point Communities, LP and FLP    
Variable Interest Entity [Line Items]    
Combined assets 527.4 520.6
Inventories 345.0 280.4
Related party assets 4.2 51.0
Cash 11.7 22.6
Combined liabilities 138.8 138.5
Related party liabilities 9.6 53.6
Intangibles 127.6 127.6
Accounts payable $ 124.6 $ 80.6