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Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Insurance and claims | $ 10,269 | $ 9,593
Net operating loss carryovers | 25,849 | 10,260
Tax credits | 10,942 | 11,985
Leased liability | 15,668 |
Capital lease obligation | 8,483 |
State bonus | 6,576 | 5,938
Other | 2,160 | 2,412
Valuation allowance | (385) | (63)
Total deferred tax assets | 79,562 | 40,125
Deferred tax liabilities: |  |
Property and equipment | (97,066) | (87,939)
Investment in partnership | (36,669) | (26,066)
Deferred fuel hedge |  | (73)
ROU Asset- leases | (15,280) |
Other | (449) | (569)
Sec. 481(a) - capital leases | (7,462) |
Prepaid expenses | (2,966) | (2,945)
Total deferred tax liabilities | (159,892) | (117,592)
Net deferred tax liability | $ (80,330) | $ (77,467)

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