Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred income tax assets:
Acquisition and debt related costs	$ 15,899	$ 18,281
Net operating loss	294,986	283,947
Self-insurance	9,766	10,039
Deferred revenue	4,696	942
Cash flow hedge	9,114	6,401
Tax credits	6,882	4,546
Other	12,539	9,652
Total deferred income tax assets	353,882	333,808
Valuation allowance	(584)	(1,466)
Net deferred tax assets	353,298	332,342
Deferred income tax liabilities:
Property and equipment	(326,320)	(309,054)
Goodwill	(49,493)	(42,458)
Amortization	(20,877)	(17,564)
Other	(4,527)	(4,961)
Total deferred income tax liabilities	(401,217)	(374,037)
Net deferred income tax liabilities	$ (47,919)	$ (41,695)