XML 64 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
RELATED PARTIES Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 01, 2016
USD ($)
a
Dec. 31, 2017
USD ($)
a
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Related Party Transaction [Line Items]              
Equity earnings from joint ventures (Note 7)     $ 1.0 $ 9.0 $ 1.0 $ 21.0  
Proceeds from contribution of timberlands to related party         $ 0.0 440.0  
Document Period End Date         Sep. 30, 2017    
Distributions received from joint ventures, return of capital         $ 23.0 $ 34.0  
Investments in and advances to joint ventures     33.0   33.0   $ 56.0
Real Estate Development Ventures              
Related Party Transaction [Line Items]              
Equity earnings from joint ventures (Note 7)     1.0   1.0    
Distributions received from joint ventures, return of capital     23.0        
Investments in and advances to joint ventures     $ 33.0   $ 33.0   $ 56.0
Twin Creeks Venture              
Related Party Transaction [Line Items]              
Percentage of profit in excess of guaranteed annual return         75.00%    
Guaranteed annual return         3.00%    
Ownership interest         21.00%    
Proceeds from contribution of timberlands to related party $ 440.0            
Agreed-upon value of acres contributed $ 560.0            
Contributed acres of timberlands to venture | a 260,000            
Subsequent Event [Member] | Twin Creeks Venture              
Related Party Transaction [Line Items]              
Proceeds from Sale of Property, Plant, and Equipment   $ 203.0          
Proceeds from Sale of Interest in Partnership Unit   $ 108.0          
Sale of Timberland acreage | a   100,000          
Mississippi | Subsequent Event [Member] | Twin Creeks Venture              
Related Party Transaction [Line Items]              
Sale of Timberland acreage | a   80,000          
Georgia | Subsequent Event [Member] | Twin Creeks Venture              
Related Party Transaction [Line Items]              
Sale of Timberland acreage | a   20,000