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Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Tax carryforwards        
Deemed repatriation tax, cash and liquid assets 15.50%      
Deemed repatriation tax, non-liquid assets 8.00%      
Undistributed E&P   $ 160,000    
Amount included in taxable income related to repatriation of Undistributed E&P   70,900    
GILTI estimate $ 20,791      
Benefit for income taxes (36,263) (25,947) $ (44,944)  
Net operating loss carryforwards, tax effected $ 92,952 $ 105,026    
Federal tax rate 21.00% 35.00% 35.00%  
Reduction to accrued liabilities and other adjustments   $ 12,800    
Effective tax rate 10.10% 12.00% 30.60%  
Tax adjustment relating to REIT $ 35,165 $ 78,873 $ 18,526  
Foreign tax rate differential (5,545) 11,949 13,328  
Increase in valuation allowance (net operating losses) (3,568) 4,317 (7,660)  
Tax expense   24,791    
Tax benefit as a result of the resolution of a tax matter 14,000      
Decrease in provision for income taxes from continuing operations     3,260  
Incremental foreign earnings 249,200      
Increase in gross interest and penalties recorded 1,961 289 1,805  
Accrued interest and penalties recorded $ 7,557 7,061    
Normal statute of limitation period, federal tax purpose 3 years      
Unrecognized tax benefits $ 35,320 38,533 $ 59,466 $ 47,685
Unrecognized tax benefits included in other long-term liabilities 32,144 34,003    
Deferred income taxes including unrecognized tax benefits 3,176 $ 4,530    
Unrecognized tax benefits net of federal benefits 32,677      
Unrecognized tax benefits that would impact tax rate 7,767      
Unrecognized tax benefits that would impact tax rate, net of federal tax benefit 5,119      
Foreign        
Tax carryforwards        
Net operating loss carryforwards, tax effected $ 82,485      
Net operating loss carryforwards subject to valuation allowance (as a percent) 67.00%      
Federal        
Tax carryforwards        
Net operating loss carryforwards, before tax effect $ 163,022      
Benefit for income taxes 10,382      
Net operating loss carryforwards, tax effected $ 49,436      
Minimum        
Tax carryforwards        
Statute of limitations for state tax 3 years      
Maximum        
Tax carryforwards        
Statute of limitations for state tax 5 years