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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Dec. 31, 2015
Income Taxes [Line Items]            
Tax expense from enactment of Tax Cuts and Jobs Act     $ 21,453      
Income tax benefit due to utilization of NOL carryforwards       $ 4,200    
Cumulative unremitted earnings of overseas subsidiaries   $ 327,100        
Performance-based compensation deferred tax asset     13,300      
Increase in deferred tax assets $ 57,800          
Decrease in deferred tax liabilities 3,700          
Decrease in accumulated deficit $ 61,500          
Less: valuation allowance   (219,093) (172,797) $ (141,859)   $ (106,746)
Federal research and development credits   44,800        
Alternative minimum tax   2,000        
State tax credits   14,800        
Accumulated deficit to write-off unamortized deferred tax charge   $ 1,185,368 1,044,365   $ (900)  
Minimum            
Income Taxes [Line Items]            
Period after loss carryforwards utilized that tax returns remain open to examination   3 years        
Maximum            
Income Taxes [Line Items]            
Period after loss carryforwards utilized that tax returns remain open to examination   4 years        
Accounting Standards Update 2016-16            
Income Taxes [Line Items]            
Accumulated deficit to write-off unamortized deferred tax charge     900      
Deferred Tax Assets, Goodwill and Intangible Assets     $ 17,800      
U.S. state            
Income Taxes [Line Items]            
Less: valuation allowance   $ (11,700)        
Operating loss carryforwards   2,500        
Ireland            
Income Taxes [Line Items]            
Income taxes payable on repatriation of unremitted earnings   8,300        
Less: valuation allowance   (207,400)        
Operating loss carryforwards   $ 1,400,000