Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 183,263	$ 188,302	$ 334,258
State	30,766	30,789	68,715
International	856	1,687	1,764
Total current income tax	214,885	220,778	404,737
Deferred:
Federal	88,718	192,267	(6,695)
State	(8,307)	32,360	(8,941)
International	430	938	746
Total deferred income tax	80,841	225,565	(14,890)
Income Tax Expense (Benefit), Continuing Operations and Discontinued Operations, Total	$ 295,726	$ 446,343	$ 389,847

Income tax expense (benefit), continuing operations and discontinued operations.

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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