Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions Related Party Transactions (Details)

v3.19.2
Related Party Transactions Related Party Transactions (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
EUR (€)
Apr. 17, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jan. 01, 2019
Dec. 31, 2018
USD ($)
Related Party Transaction [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity             $ 50,000,000.0 $ 100,000,000.0    
Non-controlling Interest, Ownership Percentage by Parent 60.00%     60.00%   60.00%     60.00%  
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders         $ 21,332,000          
Payments of Ordinary Dividends, Noncontrolling Interest   $ 20,000,000.0                
Related Party Transaction, Due from (to) Related Party, Current                   $ 14,000,000.0
Restricted Cash, Current $ 0   $ 0 $ 0 0         $ 13,970,000
Payments to Noncontrolling Interests $ 3,900,000     $ 17,880,000 0          
Swire Resources [Member]                    
Related Party Transaction [Line Items]                    
Dividend Payable to Parent   32,000,000.0                
United States of America, Dollars                    
Related Party Transaction [Line Items]                    
Due from Joint Ventures     53,300,000   53,300,000          
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders     21,300,000              
China, Yuan Renminbi                    
Related Party Transaction [Line Items]                    
Due from Joint Ventures     $ 341,300,000   $ 341,300,000          
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders   $ 136,500,000                
European Subsidiary [Member] | Unsecured And Uncommitted Credit Line1 [Member]                    
Related Party Transaction [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity | €           € 25,800,000