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Taxes (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
Effective Tax Rate Reconciliation, Excess Tax Benefits | $ (35,171) | $ 0 | $ 0
Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate | 200,978 | 176,467 | 162,198
State and Local Income Taxes | 376 | 3,064 | 2,551
Change in Deferred Tax Assets Valuation Allowance | 0 | 0 | (1,098)
Provisional one-time charge on US tax reform | (71,982) | 0 | 0
Foreign Income Tax Rate Differential | (43,691) | (65,917) | (54,798)
Other Adjustments | 3,776 | 6,209 | 1,751
Provision for taxes | $ 198,250 | $ 119,823 | $ 110,604
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% | 35.00% | 35.00%

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- Definition Provisional one-time charge to income tax expense on US tax reform relating to the Tax Cuts and Jobs Act which significantly revised U.S. corporate income tax laws. + References No definition available. + Details
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