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Income Taxes - Deferred Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Allowance for doubtful accounts | $ 756 | $ 754
Inventory reserves | 1,505 | 1,529
Warranty liability | 1,551 | 1,465
Deferred compensation | 1,659 | 1,437
Earnout liabilities | 297 | 354
Pension and retiree health benefit obligations | 1,573 | 1,738
Interest rate swap | 1,615 | 3,373
Accrued vacation | 1,440 | 1,241
Medical claims reserve | 48 | 84
Operating lease liabilities | 5,011 | 5,583
Net operating losses | 3,182 | 3,744
Other accrued liabilities | 5,106 | 4,949
Other | 663 |
Valuation allowance | (3,273) | (3,374)
Total deferred tax assets | 21,133 | 22,877
Deferred tax liabilities: |  |
Tax deductible goodwill and other intangibles | (35,609) | (35,953)
Accelerated depreciation | (9,918) | (8,105)
Operating leases - right of use assets | (4,626) | (5,583)
Other | (769) | 83
Total deferred tax liabilities | (50,922) | (49,558)
Net deferred tax liabilities | (29,789) | (26,681)
Valuation allowance | 3,273 | $ 3,374
State |  |
Deferred tax assets: |  |
Valuation allowance | (2,447) |
Deferred tax liabilities: |  |
Operating loss carry forwards | 2,356 |
Valuation allowance | 2,447 |
Non-State |  |
Deferred tax assets: |  |
Valuation allowance | (826) |
Deferred tax liabilities: |  |
Valuation allowance | $ 826 |

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