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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 |

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