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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
Provision for Income Taxes | The provision for income taxes is comprised of the following (in thousands):
| Years ended December 31,
| 2022 |  | 2021 |  | 2020
Current: |  |  |  |  |
Federal | $ | 55,488 |  |  | $ | 27,011 |  |  | $ | 33,495 |
State | 17,312 |  |  | 10,139 |  |  | 8,918 |
| 72,800 |  |  | 37,150 |  |  | 42,413 |
Deferred: |  |  |  |  |
Federal | 5,584 |  |  | (437) |  |  | (7,177) |
State | 1,495 |  |  | (1) |  |  | (1,298) |
| 7,079 |  |  | (438) |  |  | (8,475) |
Total tax expense | $ | 79,879 |  |  | $ | 36,712 |  |  | $ | 33,938 |
Reconciliation Between Effective Tax Rate on Net Income (Loss) and Federal Statutory Tax Rate | The reconciliation between our effective tax rate on net income and the federal statutory rate is as follows (dollars in thousands):
| Years ended December 31,
| 2022 |  | 2021 |  | 2020
Income tax at federal statutory rate | $ | 63,694 |  |  | 21.0 | % |  | $ | 32,650 |  |  | 21.0 | % |  | $ | 27,547 |  |  | 21.0 | %
Stock compensation | 300 |  |  | 0.1 | % |  | (1,567) |  |  | (1.0) | % |  | 331 |  |  | 0.3 | %
Other permanent items | 1,282 |  |  | 0.4 | % |  | 1,274 |  |  | 0.8 | % |  | 424 |  |  | 0.3 | %
Change in valuation allowance | (184) |  |  | (0.1) | % |  | (922) |  |  | (0.6) | % |  | (207) |  |  | (0.2) | %
Change in uncertain tax positions | (459) |  |  | (0.1) | % |  | (2,867) |  |  | (1.8) | % |  | 65 |  |  | 0.1 | %
State income taxes, net of federal benefit | 15,246 |  |  | 5.0 | % |  | 8,144 |  |  | 5.2 | % |  | 5,778 |  |  | 4.4 | %
Total tax expense | $ | 79,879 |  |  | 26.3 | % |  | $ | 36,712 |  |  | 23.6 | % |  | $ | 33,938 |  |  | 25.9 | %
Net Deferred Tax Asset or Liability | Components of the net deferred tax asset or liability are as follows (in thousands):
| As of December 31,
| 2022 |  | 2021
Deferred Tax Assets |  |  |
Long-term |  |  |
Accrued liabilities and allowances | $ | 13,009 |  |  | $ | 10,200 |
Allowance for doubtful accounts | 1,251 |  |  | 979
Inventories | 1,210 |  |  | 900
Property and equipment | 538 |  |  | 333 |
Intangibles | 7,673 |  |  | 7,042
Net operating loss carryforwards | 719 |  |  | 1,049
Other | 15 |  |  | 14
Long-term deferred tax assets | 24,415 |  |  | 20,517
Less: Valuation allowance | (44) |  |  | (216)
Net deferred tax assets | 24,371 |  |  | 20,301
Deferred Tax Liabilities |  |  |
Long-term |  |  |
Accrued liabilities and allowances | (640) |  |  | (669)
Property and equipment | (8,489) |  |  | (7,629)
Intangibles | (10,659) |  |  | (6,783)
Investment in partnership | (31,154) |  |  | (8,271)
Other | (1,067) |  |  | (793)
Long-term deferred tax liabilities | (52,009) |  |  | (24,145)
Net deferred tax liabilities | $ | (27,638) |  |  | $ | (3,844) |
The above amounts are included in our Consolidated Balance Sheets as follows: |  |  |
Other non-current assets | 820 |  |  | 975 |
Long-term deferred income tax liabilities | (28,458) |  |  | (4,819) |
Net deferred tax liabilities | $ | (27,638) |  |  | $ | (3,844) |
Rollforward of Gross Unrecognized Tax Benefits | A rollforward of the gross unrecognized tax benefits is as follows (in thousands):
Unrecognized tax benefit, December 31, 2019 | $ | 5,717 |
Increase as a result of tax positions taken during the period | 3,822
Decrease as a result of tax positions taken during the period | (2,873)
Increase as a result of expiring statutes | 10
Unrecognized tax benefit, December 31, 2020 | $ | 6,676 |
Increase as a result of tax positions taken during the period | 4,482
Decrease as a result of tax positions taken during the period | (3,999)
Decrease as a result of expiring statutes | (2,857)
Unrecognized tax benefit, December 31, 2021 | $ | 4,302 |
Increase as a result of tax positions taken during the period | 5,448 |
Decrease as a result of tax positions taken during the period | (4,863) |
Increase as a result of expiring statutes | 3 |
Unrecognized tax benefit, December 31, 2022 | $ | 4,890 |

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