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STOCK-BASED COMPENSATION PLANS (Tables) | 3 Months Ended
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Mar. 31, 2021
STOCK-BASED COMPENSATION PLANS |
Summary of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2021 |  | 2020
​ | ​ | (dollars in thousands)
Restricted stock units | ​ | $ | 114 | ​ | $ | 67
Performance restricted stock units | ​ | ​ | 15 | ​ | ​ | —
Total awards classified as equity | ​ | ​ | 129 | ​ | ​ | 67
Stock appreciation rights | ​ | ​ | 130 | ​ | ​ | (335)
Total stock-based compensation expense (benefit) | ​ | $ | 259 | ​ | $ | (268)
Schedule of the summary of outstanding restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ | ​ | 2021 | ​ | 2020
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | Restricted | ​ | Grant Date | ​ | Restricted | ​ | Grant Date
​ |  | Stock Units |  | Fair Value |  | Stock Units |  | Fair Value
Beginning balance | ​ | 71,000 | ​ | $ | 18.98 | ​ | — | ​ | $ | —
Granted | ​ | 46,347 | ​ | ​ | 15.53 | ​ | 73,150 | ​ | ​ | 19.03
Vested | ​ | (20,225) | ​ | ​ | 18.86 | ​ | — | ​ | ​ | —
Forfeited | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Ending balance | ​ | 97,122 | ​ | $ | 17.36 | ​ | 73,150 | ​ | $ | 19.03
​ A further summary of restricted stock units as of March 31, 2021, is as follows:
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ | ​ | Restricted | ​ | Remaining
Grant Date Fair Values |  | Stock Units |  | Contractual Term
$ 15.53 | ​ | 46,347 | ​ | 2.8 | years
$ 19.03 | ​ | 50,775 | ​ | 2.8 | years
Schedule of the status of stock appreciation rights and changes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ | ​ | 2021 | ​ | 2020
​ |  | Stock Appreciation Rights |  | Weighted Average Grant Date Assigned Value |  | Stock Appreciation Rights |  | Weighted Average Grant Date Assigned Value
Beginning balance | ​ | 105,570 | ​ | $ | 16.32 | ​ | 110,160 | ​ | $ | 16.32
Granted | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Exercised | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Expired | ​ | (1,530) | ​ | ​ | 16.32 | ​ | — | ​ | ​ | —
Forfeited | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Ending balance | ​ | 104,040 | ​ | $ | 16.32 | ​ | 110,160 | ​ | $ | 16.32
​ A further summary of stock appreciation rights as of March 31, 2021, is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Weighted Average
​ | ​ | Stock Appreciation Rights | ​ | Remaining
Grant Date Assigned Values |  | Outstanding |  | Exercisable |  | Contractual Term
$ 16.32 | ​ | 104,040 | ​ | 85,680 | ​ | 7.9 | years
Schedule of assumptions used in valuing stock appreciation rights | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ |  | 2021 |  | 2020 | ​
Risk-free interest rate | ​ | ​ | 1.55 | % | ​ | 0.80 | %
Expected volatility | ​ | ​ | 34.96 | % | ​ | 34.72 | %
Expected life (in years) | ​ | ​ | 8.4 | ​ | ​ | 8.7 | ​
Expected dividend yield | ​ | ​ | 3.50 | % | ​ | 3.96 | %
Performance restricted stock units |
STOCK-BASED COMPENSATION PLANS |
Schedule of the summary of outstanding restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended March 31,
​ | ​ | 2021 | ​ | 2020
​ | ​ | Maximum | ​ | ​ | ​ | Maximum | ​ | ​
​ | ​ | Awarded | ​ | Weighted | ​ | Awarded | ​ | Weighted
​ | ​ | Performance | ​ | Average | ​ | Performance | ​ | Average
​ | ​ | Restricted | ​ | Grant Date | ​ | Restricted | ​ | Grant Date
​ |  | Stock Units |  | Fair Value |  | Stock Units |  | Fair Value
Beginning balance | ​ | — | ​ | $ | — | ​ | — | ​ | $ | —
Granted | ​ | 43,046 | ​ | ​ | 15.53 | ​ | — | ​ | ​ | —
Vested | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Forfeited | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Ending balance | ​ | 43,046 | ​ | $ | 15.53 | ​ | — | ​ | $ | —
​ A further summary of performance restricted stock units as of March 31, 2021, is as follows:
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Maximum | ​ | ​ | ​
​ | ​ | Awarded | ​ | ​ | ​
​ | ​ | Performance | ​ | Weighted Average
​ | ​ | Restricted | ​ | Remaining
Grant Date Fair Values |  | Stock Units |  | Contractual Term
$ 15.53 | ​ | 43,046 | ​ | 2.9 | years

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock appreciation rights, including, but not limited to: (a) expected term of SARs and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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