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v3.20.4

Components of Deferred Taxes (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Self-insurance reserves | $ 75,648 | $ 69,217
Compensation accruals | 71,054 | 70,680
Doubtful accounts and other reserves | 94,295 | 77,665
Other currently non-deductible accrued liabilities | 61,634 | 36,500
Operating lease liabilities | 89,865 | 76,164
State and foreign net operating loss carryforwards and other state and foreign deferred tax assets | 81,036 | 87,662
Net pension liabilities – OCI only | 1,356 | 2,427
Deferred income tax assets, Gross | 474,888 | 420,315
Valuation Allowance | (68,003) | (75,277)
Total deferred income taxes | 406,885 | 345,038
Depreciable and amortizable assets | 296,588 | 275,901
Right of use assets-operating leases | 89,493 | 76,164
Other liabilities | 3,697 | 1,855
Deferred income tax liabilities, Gross | $ 389,778 | $ 353,920

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