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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Provision at the statutory rate	$ 96,110	$ 123,815	$ 107,690
Increases (decreases) resulting from —
Tax Cuts and Jobs Act	(6,295)	(70,129)	0
State taxes	18,504	17,920	6,479
Foreign taxes	2,734	(16,958)	1,860
Contingency reserves, net	(2,619)	3,651	(13,540)
Production activity deduction	0	(1,504)	(8,586)
Employee per diems, meals and entertainment	11,949	13,605	8,764
Taxes on unincorporated joint ventures	(578)	(1,354)	(656)
Asset impairments	0	0	1,909
Entity restructuring and recapitalization efforts	(4,424)	(26,668)	0
Equity compensation	(1,449)	(5,095)	0
Valuation allowance - Foreign Tax Credits	43,507	0	0
Other	4,220	(1,751)	3,326
Total provision for income taxes from continuing operations	$ 161,659	$ 35,532	$ 107,246

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