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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Components of Pre-tax Income and Provision for Income Taxes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
​ | ​ | 2019 |  | 2020 |  | 2021
​ | ​ | (In thousands)
Provision for income taxes: | ​ | ​ |  |  | ​ |  |  | ​ |
Currently payable | ​ | $ | 4,849 | ​ | $ | 3,222 | ​ | $ | 5,476
Deferred income tax expense (benefit) | ​ |  | 89 | ​ |  | (48) | ​ |  | (321)
Total | ​ | $ | 4,938 | ​ | $ | 3,174 | ​ | $ | 5,155
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Expected tax expense, at the U.S. federal statutory income tax rate of 21% | ​ | $ | 4,397 | ​ | $ | 2,835 | ​ | $ | 4,562
State income taxes | ​ |  | 742 | ​ |  | 378 | ​ |  | 692
FDII benefit | ​ |  | (201) | ​ |  | (55) | ​ |  | (120)
Other, net | ​ |  | — | ​ |  | 16 | ​ |  | 21
Total provision for income taxes | ​ | $ | 4,938 | ​ | $ | 3,174 | ​ | $ | 5,155
Components of Net Deferred Tax Liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2021
​ | ​ | (In thousands)
Tax effect of temporary differences related to: |  | ​ |  |  | ​ |
Inventories | ​ | $ | 356 | ​ | $ | 531
Property and equipment | ​ |  | (2,887) | ​ |  | (2,951)
Accrued liabilities and other deductible differences | ​ |  | 18 | ​ |  | 39
Accrued employee benefits | ​ |  | 982 | ​ |  | 1,182
Goodwill | ​ |  | (1,693) | ​ |  | (1,693)
Other taxable differences | ​ |  | (15) | ​ |  | (26)
Total deferred tax liability | ​ | $ | (3,239) | ​ | $ | (2,918)

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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