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Income Taxes - Schedule of Income Tax Provision (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Federal provision $ 120,317 $ 95,171 $ 94,405
State and local provisions 23,496 23,387 21,320
Foreign provision 244 749 831
Current income tax expense 144,057 119,307 116,556
Deferred (53,358) (8,108) (10,300)
Income tax provision $ 90,699 $ 111,199 $ 106,256