Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions Related Party Transactions (Details)

v3.10.0.1
Related Party Transactions Related Party Transactions (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CNY (¥)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Related Party Transaction [Line Items]            
Non-controlling Interest, Ownership Percentage by Parent 60.00%     60.00%    
Repayments of Related Party Debt       $ 0 $ 14,236,000  
Related party interest expense on note payable $ 0   $ 180,000 0 429,000  
Swire Resources [Member]            
Related Party Transaction [Line Items]            
Related party service fees, interest expense and miscellaneous expenses 73,000   329,000      
Accounts payable to related party current 83,000   $ 340,000 $ 83,000 $ 340,000 $ 89,000
Dividends 53,330,000          
Dividend Payable to Parent 31,998,000          
Dividend Payable to Non Controlling Interest $ 21,332,000          
China, Yuan Renminbi | Swire Resources [Member]            
Related Party Transaction [Line Items]            
Dividends | ¥   ¥ 341,347,000