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INCOME TAXES | 12 Months Ended
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Dec. 31, 2023
INCOME TAXES |
INCOME TAXES | NOTE 9. INCOME TAXES The following table summarizes the current and deferred components of income tax expense (benefit) for each of the years ended December 31, 2023, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022 |  | 2021
Current: |  | ​ |  |  | ​ |  |  | ​ |
Federal tax expense | ​ | $ | 10,704 | ​ | $ | 10,444 | ​ | $ | 7,796
State tax expense | ​ |  | 2,247 | ​ |  | 1,551 | ​ |  | 1,106
Total current tax expense | ​ |  | 12,951 | ​ |  | 11,995 | ​ |  | 8,902
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax (benefit) expense | ​ |  | (686) | ​ |  | (707) | ​ |  | 427
Total income tax expense | ​ | $ | 12,265 | ​ | $ | 11,288 | ​ | $ | 9,329
​ The following table reconciles the expected federal income tax expense (computed by applying the federal statutory tax rate of 21%) to recorded income tax expense for the years ended December 31, 2023, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2023 | ​ | 2022 | ​ | 2021 |
(in thousands, except ratios) | ​ | Amount | ​ | Rate | ​ | Amount | ​ | Rate | ​ | Amount | ​ | Rate |
Statutory tax rate |  | $ | 11,995 |  | 21.00 | % | $ | 11,517 |  | 21.00 | % | $ | 10,210 |  | 21.00 | %
Increase (decrease) resulting from: |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |
State taxes, net of federal benefit |  | ​ | 1,539 |  | 2.69 |  | ​ | 1,477 |  | 2.69 |  | ​ | 1,280 |  | 2.63 |
Tax exempt interest |  | ​ | (1,042) |  | (1.82) |  | ​ | (1,003) |  | (1.83) |  | ​ | (1,240) |  | (2.55) |
Federal tax credits |  | ​ | (471) |  | (0.82) |  | ​ | (241) |  | (0.44) |  | ​ | (582) |  | (1.20) |
Officers' life insurance |  | ​ | (578) |  | (1.01) |  | ​ | (498) |  | (0.91) |  | ​ | (466) |  | (0.96) |
Gain on disposal of low income housing tax credit investments |  | ​ | — |  | — |  | ​ | — |  | — |  | ​ | — |  | — |
Stock-based compensation plans |  | ​ | 17 |  | 0.03 |  | ​ | (16) |  | (0.03) |  | ​ | (73) |  | (0.15) |
Other |  | ​ | 805 | ​ | 1.40 |  | ​ | 52 |  | 0.10 |  | ​ | 200 |  | 0.42 |
Effective tax rate | ​ | $ | 12,265 |  | 21.47 | % | $ | 11,288 |  | 20.58 | % | $ | 9,329 |  | 19.19 | %
​ The net deferred tax asset was $23.0 million at December 31, 2023 and $24.4 million at December 31, 2022. The tax effects of temporary differences that give rise to deferred tax assets and deferred tax liabilities at December 31, 2023 and 2022 are summarized below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2023 | ​ | 2022
(in thousands) | ​ | Assets | ​ | Liabilities | ​ | Assets | ​ | Liabilities
Allowance for credit losses |  | $ | 6,593 |  | $ | — |  | $ | 5,964 |  | $ | —
Deferred compensation | ​ |  | 3,678 | ​ |  | — | ​ |  | 3,812 | ​ |  | —
Unrealized gain or loss on securities available for sale | ​ |  | 14,702 | ​ |  | — | ​ |  | 16,586 | ​ |  | —
Unrealized gain or loss on derivatives | ​ |  | 312 | ​ |  | — | ​ |  | 539 | ​ |  | —
Depreciation | ​ |  | — | ​ |  | 1,101 | ​ |  | — | ​ |  | 1,723
Deferred loan origination fees, net | ​ |  | — | ​ |  | 129 | ​ |  | 129 | ​ |  | —
Non-accrual interest | ​ |  | 632 | ​ |  | — | ​ |  | 600 | ​ |  | —
Branch acquisition costs and goodwill | ​ |  | — | ​ |  | 1,987 | ​ |  | — | ​ |  | 1,644
Core deposit intangible | ​ |  | — | ​ |  | 689 | ​ |  | — | ​ |  | 806
Acquisition fair value adjustments | ​ |  | 232 | ​ |  | — | ​ |  | 213 | ​ |  | —
Prepaid expenses | ​ |  | — | ​ |  | 297 | ​ |  | — | ​ |  | 271
Mortgage servicing rights | ​ |  | — | ​ |  | 741 | ​ |  | — | ​ |  | 780
Equity compensation | ​ |  | 1,016 | ​ |  | — | ​ |  | 736 | ​ |  | —
Prepaid pension | ​ |  | — | ​ |  | 669 | ​ |  | — | ​ |  | 616
Contract incentives | ​ |  | 564 | ​ |  | — | ​ |  | 766 | ​ |  | —
Right of use asset | ​ |  | — | ​ |  | 1,611 | ​ |  | — | ​ |  | 1,863
Lease liability | ​ |  | 1,716 | ​ |  | — | ​ |  | 1,961 | ​ |  | —
Other | ​ |  | 758 | ​ |  | — | ​ |  | 840 | ​ |  | —
Total | ​ | $ | 30,203 | ​ | $ | 7,224 | ​ | $ | 32,146 | ​ | $ | 7,703
​ We have determined that a valuation allowance is not required for its net deferred tax asset since it is more likely than not that this asset is realizable principally through future taxable income and future reversal of existing temporary differences. GAAP requires the measurement of unrecorded tax benefits related to uncertain tax positions. An unrecorded tax benefit is the difference between the tax benefit of a position taken, or expected to be taken, on a tax return and the benefit recorded for accounting purposes. At December 31, 2023 and 2022, we had no unrecorded tax benefits and do not expect our position to significantly change within the next 12 months. We are subject to income tax in the U.S. federal jurisdiction and also in the states of Maine, New Hampshire and Massachusetts. We are no longer subject to examination by taxing authorities for years before 2020.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480990/946-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//740/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-14 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-21 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 270 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482526/740-270-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 17 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-17 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482603/740-30-50-2 + Details
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