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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Net operating losses and tax credit carryforwards – federal and state | $ 25,118 | $ 27,294
Bad debt allowance | 996 | 898
Accrued compensation and severance | 14,645 | 15,229
Pension reserves | 724 | 595
Insurance reserves | 16,485 | 13,994
Leases | 3,436 | 5,374
Accrued expenses | 1,496 | 4,231
Interest carryforwards | 59,413 | 32,272
Lease liabilities | 98,419 |
Other assets | 2,562 | 2,284
Total gross deferred tax assets | 223,294 | 102,171
Less: valuation allowance | (28,648) | (24,079)
Deferred tax assets | 194,646 | 78,092
Deferred tax liabilities: |  |
Fixed asset basis difference | (43,992) | (48,698)
Prepaid items | (2,163) | (1,728)
Intangible assets | (104,542) | (87,628)
Lease right-of-use assets | (99,677) |
Other liabilities | (12,793) | (16,942)
Total deferred tax liabilities | (263,167) | (154,996)
Total net deferred tax liability | $ (68,521) | $ (76,904)

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