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Tax Effect of Temporary Differences and Tax Attributes Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 382,936 | $ 457,362
Tax credits | 4,222 | 4,453
Expense associated with stock options and restricted stock | 8,178 | 9,364
Workers' compensation allowance | 15,770 | 14,833
Other deferred tax asset | 25,020 | 26,483
Total deferred tax assets, gross | 436,126 | 512,495
Allowance to reduce deferred tax asset to expected realizable value | (91,685) | (189,737)
Total deferred tax assets, net | 344,441 | 322,758
Deferred tax liabilities: |  |
Property and equipment basis difference | (355,129) | (335,980)
Other | (14,840) | (12,037)
Total deferred tax liabilities | (369,969) | (348,017)
Net deferred tax liability | $ (25,528) | $ (25,259)

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