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Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Current: |  |  |
Federal | $ 181,640 | $ 146,633 | $ 114,687
State | 36,281 | 33,054 | 27,358
Foreign | 13,892 | 15,377 | 16,598
Deferred: |  |  |
Federal and state | (8,398) | (4,626) | (7,759)
Foreign | (181) | 983 | (5,500)
Provision (benefit) for income taxes | $ 223,234 | $ 191,421 | $ 145,384

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