Components of Deferred Taxes (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Self-insurance reserves	$ 69,217	$ 68,402
Compensation accruals	70,680	74,124
Doubtful accounts and other reserves	77,665	27,184
Other currently non-deductible accrued liabilities	36,500	35,253
Operating lease liabilities	76,164
State and foreign net operating loss carryforwards and other state and foreign deferred tax assets	87,662	86,315
Net pension liabilities – OCI only	2,427	4,475
Deferred income tax assets, Gross	420,315	295,753
Valuation Allowance	(75,277)	(79,264)
Total deferred income taxes	345,038	216,489
Depreciable and amortizable assets	275,901	257,896
Right of use assets-operating leases	76,164
Other combined items – OCI only	0	929
Other liabilities	1,855	2,045
Deferred income tax liabilities, Gross	$ 353,920	$ 260,870