Income Taxes - Summary of Deferred Tax Liabilities and Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Depreciation	$ 117,625	$ 103,471
Other	1,414	3,482
Gross deferred tax liabilities	119,039	106,953
Allowance for doubtful accounts	(1,225)	(1,350)
Equity-based compensation	(4,538)	(3,961)
Employee benefits	(6,115)	(4,847)
Claims and insurance	(23,241)	(20,942)
Other	(3,721)	(8,436)
Gross deferred tax assets	(38,840)	(39,536)
Net deferred tax liability	$ 80,199	$ 67,417