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SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2021
SECURITIES |
Schedule of amortized cost and fair value of available-for-sale debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | December 31, 2021
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
​ |  | Amortized |  | Holding |  | Holding |  | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Obligations of the U.S. Treasury | ​ | $ | 25,058 | ​ | $ | 52 | ​ | $ | (198) | ​ | $ | 24,912
Obligations of U.S. Government agencies | ​ | ​ | 23,936 | ​ | ​ | 563 | ​ | ​ | (408) | ​ | ​ | 24,091
Bank holding company debt securities | ​ | ​ | 18,000 | ​ | ​ | 18 | ​ | ​ | (31) | ​ | ​ | 17,987
Obligations of states and political subdivisions: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  |
Tax-exempt | ​ |  | 143,427 | ​ |  | 4,749 | ​ |  | (148) | ​ |  | 148,028
Taxable | ​ |  | 72,182 | ​ |  | 1,232 | ​ |  | (649) | ​ |  | 72,765
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential pass-through securities | ​ |  | 98,048 | ​ |  | 705 | ​ |  | (572) | ​ |  | 98,181
Residential collateralized mortgage obligations | ​ |  | 44,015 | ​ |  | 437 | ​ |  | (205) | ​ |  | 44,247
Commercial mortgage-backed securities | ​ |  | 86,926 | ​ |  | 1,548 | ​ |  | (1,006) | ​ |  | 87,468
Total available-for-sale debt securities | ​ | $ | 511,592 | ​ | $ | 9,304 | ​ | $ | (3,217) | ​ | $ | 517,679
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | December 31, 2020
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ |  | ​ |  | Unrealized | ​ | Unrealized | ​ | ​ | ​
​ |  | Amortized |  | Holding |  | Holding |  | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Obligations of the U.S. Treasury | ​ | $ | 12,184 | ​ | $ | 0 | ​ | $ | (2) | ​ | $ | 12,182
Obligations of U.S. Government agencies | ​ | ​ | 25,349 | ​ | ​ | 1,003 | ​ | ​ | (8) | ​ | ​ | 26,344
Obligations of states and political subdivisions: | ​ |  |  | ​ |  | ​ | ​ |  | ​ | ​ |  |
Tax-exempt | ​ |  | 116,427 | ​ |  | 6,000 | ​ |  | (26) | ​ |  | 122,401
Taxable | ​ |  | 45,230 | ​ |  | 2,246 | ​ |  | (24) | ​ |  | 47,452
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential pass-through securities | ​ |  | 36,853 | ​ |  | 1,323 | ​ |  | 0 | ​ |  | 38,176
Residential collateralized mortgage obligations | ​ |  | 56,048 | ​ |  | 1,428 | ​ |  | (9) | ​ |  | 57,467
Commercial mortgage-backed securities | ​ |  | 42,461 | ​ |  | 2,849 | ​ |  | 0 | ​ |  | 45,310
Total available-for-sale debt securities | ​ | $ | 334,552 | ​ | $ | 14,849 | ​ | $ | (69) | ​ | $ | 349,332
Schedule of gross unrealized losses and fair value of available-for-sale debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2021 |  | Less Than 12 Months |  | 12 Months or More |  | Total
(In Thousands) | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
​ |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
Obligations of the U.S. Treasury | ​ | $ | 18,886 | ​ | $ | (198) | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 18,886 | ​ | $ | (198)
Obligations of U.S. Government agencies | ​ | ​ | 9,735 | ​ | ​ | (264) | ​ | ​ | 4,856 | ​ | ​ | (144) | ​ | ​ | 14,591 | ​ | ​ | (408)
Bank holding company debt securities | ​ | ​ | 12,969 | ​ | ​ | (31) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 12,969 | ​ | ​ | (31)
Obligations of states and political subdivisions: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax-exempt | ​ | ​ | 17,852 | ​ | ​ | (141) | ​ | ​ | 549 | ​ | ​ | (7) | ​ | ​ | 18,401 | ​ | ​ | (148)
Taxable | ​ |  | 31,261 | ​ |  | (517) | ​ |  | 3,277 | ​ |  | (132) | ​ |  | 34,538 | ​ |  | (649)
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |
Residential pass-through securities | ​ | ​ | 71,451 | ​ | ​ | (572) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 71,451 | ​ | ​ | (572)
Residential collateralized mortgage obligations | ​ |  | 15,117 | ​ |  | (205) | ​ |  | 0 | ​ |  | 0 | ​ |  | 15,117 | ​ |  | (205)
Commercial mortgage-backed securities | ​ |  | 52,867 | ​ |  | (1,006) | ​ |  | 0 | ​ |  | 0 | ​ |  | 52,867 | ​ |  | (1,006)
Total temporarily impaired available-for-sale debt securities | ​ | $ | 230,138 | ​ | $ | (2,934) | ​ | $ | 8,682 | ​ | $ | (283) | ​ | $ | 238,820 | ​ | $ | (3,217)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 |  | Less Than 12 Months |  | 12 Months or More |  | Total
(In Thousands) | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
​ |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
Obligations of the U.S. Treasury | ​ | $ | 9,159 | ​ | $ | (2) | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 9,159 | ​ | $ | (2)
Obligations of U.S. Government agencies | ​ | ​ | 4,992 | ​ | ​ | (8) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 4,992 | ​ | ​ | (8)
Obligations of states and political subdivisions: |  | ​ | ​ |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Tax-exempt | ​ | ​ | 3,811 | ​ | ​ | (26) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 3,811 | ​ | ​ | (26)
Taxable | ​ |  | 5,235 | ​ |  | (24) | ​ |  | 0 | ​ |  | 0 | ​ |  | 5,235 | ​ |  | (24)
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, | ​ |  |  | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Residential collateralized mortgage obligations | ​ |  | 2,861 | ​ |  | (9) | ​ |  | 0 | ​ |  | 0 | ​ |  | 2,861 | ​ |  | (9)
Total temporarily impaired available-for-sale debt securities | ​ | $ | 26,058 | ​ | $ | (69) | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 26,058 | ​ | $ | (69)
Schedule of gross realized gains and losses from available-for-sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) | ​ | 2021 | ​ | 2020
Gross realized gains from sales | ​ | $ | 27 | ​ | $ | 222
Gross realized losses from sales | ​ |  | (3) | ​ |  | (53)
Net realized gains | ​ | $ | 24 | ​ | $ | 169
Income tax provision related to net realized gains | ​ | $ | 5 | ​ | $ | 35
Schedule of the amortized cost and fair value of available-for-sale debt securities by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) | ​ | December 31, 2021
​ | ​ | Amortized | ​ | Fair
​ |  | Cost |  | Value
Due in one year or less | ​ | $ | 14,454 | ​ | $ | 14,538
Due from one year through five years | ​ |  | 58,561 | ​ |  | 59,116
Due from five years through ten years | ​ |  | 79,532 | ​ |  | 81,073
Due after ten years | ​ |  | 130,056 | ​ |  | 133,056
Sub-total | ​ |  | 282,603 | ​ |  | 287,783
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |
Residential pass-through securities | ​ |  | 98,048 | ​ |  | 98,181
Residential collateralized mortgage obligations | ​ |  | 44,015 | ​ |  | 44,247
Commercial mortgage-backed securities | ​ |  | 86,926 | ​ |  | 87,468
Total | ​ | $ | 511,592 | ​ | $ | 517,679

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563 + Details
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