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Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Accrued compensation | $ 12,467 | $ 13,153
Other reserves | 14,154 | 10,297
Tax credit carryforwards | 8,715 | 6,669
Operating loss carryforwards | 2,845 | 4,879
Lease accounting liability | 11,669 | 10,195
Total gross deferred income taxes | 49,850 | 45,193
Valuation allowances | (6,518) | (4,713)
Total deferred tax assets | 43,332 | 40,480
Prepaids | (6,404) | (4,774)
Other receivables |  | (656)
Property and equipment | (132,669) | (124,964)
Goodwill | (55,166) | (55,195)
Lease right-of-use asset | (11,418) | (10,195)
Total deferred tax liabilities | (205,657) | (195,784)
Total deferred taxes | $ (162,325) | $ (155,304)

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