Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred income tax assets:
Acquisition and debt related costs	$ 4,128	$ 5,550
Net operating losses	272,943	180,693
Goodwill impairment	53,887	54,271
Self-insurance	7,410	7,308
Deferred revenue	5,707	2,546
Cash flow hedge		571
Restricted stock	2,826	4,411
Tax credits	10,577	10,230
Legal settlements	645	8,590
Lease obligations	29,943	32,078
Interest limitation	463
Other	6,061	5,200
Total deferred income tax assets	394,590	311,448
Valuation allowance	(65,617)	(5,216)
Net deferred tax assets	328,973	306,232
Deferred income tax liabilities:
Property and equipment	(211,729)	(225,827)
Amortization - Goodwill	(51,435)	(46,688)
Amortization - Other intangibles	(26,080)	(22,979)
Right of use assets	(29,631)	(31,940)
Other	(3,023)	(2,558)
Total deferred income tax liabilities	(321,898)	(329,992)
Net deferred income tax assets (liabilities)	$ 7,075
Net deferred income tax assets (liabilities)		$ (23,760)