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Income Taxes - Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Provision at the statutory rate	$ 123,815	$ 107,690	$ 80,036
Increases (decreases) resulting from —
Tax Cuts and Jobs Act	(70,129)	0	0
State taxes	17,920	6,479	7,241
Foreign taxes	(16,958)	1,860	1,239
Contingency reserves, net	3,651	(13,540)	4,438
Production activity deduction	(1,504)	(8,586)	(6,871)
Employee per diems, meals and entertainment	13,605	8,764	8,727
Taxes on unincorporated joint ventures	(1,354)	(656)	(3,838)
Asset impairments	0	1,909	7,047
Entity restructuring and recapitalization efforts	(26,668)	0	0
Equity compensation	(5,095)	0	0
Other	(1,751)	3,326	(547)
Total provision for income taxes from continuing operations	$ 35,532	$ 107,246	$ 97,472

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