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Income Taxes - Components of Income (Loss) from Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Domestic $ 536,869 $ 600,939 $ 537,271
Foreign 343,857 278,791 239,991
Income before provision for income taxes $ 880,726 $ 879,730 $ 777,262