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Components of Income Tax Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current:      
Federal $ 337,178 $ 183,263 $ 188,302
State 48,771 30,766 30,789
International 1,928 856 1,687
Total current income tax 387,877 214,885 220,778
Deferred:      
Federal 93,214 88,718 192,267
State (27,764) (8,307) 32,360
International 2,486 430 938
Total deferred income tax 67,936 80,841 225,565
Income Tax Expense (Benefit), Continuing Operations and Discontinued Operations, Total $ 455,813 $ 295,726 $ 446,343