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Income Taxes (Details 3) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Tax credit and operating loss carryforwards      
Deferred Tax Assets, Capital Loss Carryforwards $ 26,400    
Portion of unrecognized tax benefits, which if recognized, would be recorded as an income tax benefit 1,800 $ 2,100  
Amount of potential unrecognized tax benefit 100    
Reconciliation of the beginning and ending amounts of unrecognized income tax benefits      
Balance at the beginning of the period 23,482 22,652 $ 21,925
Balance at the end of the period 115,653 23,482 22,652
Tax positions related to prior years:      
Additions 76,158 115 16
Reductions (472) (317) (372)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities 0 0 0
Tax positions related to current year:      
Additions 16,485 $ 1,032 $ 1,083
Undistributed earnings 14,000    
Deferred Tax Liabilities, Undistributed Foreign Earnings $ 1,900    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 35.00%
Tax credit carryforwards, alternative minimum tax credit $ 1,900    
Foreign Tax Credit      
Tax credit and operating loss carryforwards      
Tax credit carryforwards 186,100    
Foreign Tax Authority [Member]      
Reconciliation of the beginning and ending amounts of unrecognized income tax benefits      
Balance at the end of the period 91,000    
Federal | Research and Development      
Tax credit and operating loss carryforwards      
Tax credit carryforwards 40,600    
Federal | Foreign Tax Credit      
Tax positions related to current year:      
Tax credit carryforward, subject to expiration 29,100    
State and local jurisdiction      
Tax credit and operating loss carryforwards      
Tax credit carryforwards, operating loss 36,400    
State and local jurisdiction | California Franchise Tax Board      
Tax credit and operating loss carryforwards      
Tax credit carryforwards, operating loss 202,700    
State and local jurisdiction | Research and Development      
Tax credit and operating loss carryforwards      
Tax credit carryforwards 31,500    
Long-term deferred tax assets      
Reconciliation of the beginning and ending amounts of unrecognized income tax benefits      
Balance at the beginning of the period 21,400    
Balance at the end of the period 22,800 $ 21,400  
Long-term income taxes payable      
Reconciliation of the beginning and ending amounts of unrecognized income tax benefits      
Balance at the beginning of the period 2,100    
Balance at the end of the period $ 1,800 $ 2,100