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Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current: |  |  |
Federal | $ 99,830 | $ 133,097 | $ 156,937
State | 38,356 | 24,944 | 34,927
Foreign | 35,007 | 27,079 | 20,725
Deferred: |  |  |
Federal and state | (15,849) | 41,717 | (3,785)
Foreign | (30) | 95 | 1,917
Provision (benefit) for income taxes | $ 157,314 | $ 226,932 | $ 210,721

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