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STOCK INCENTIVE PLAN - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Restricted Stock Unit Transactions - Shares |  |  |
Nonvested, beginning balance (in shares) | 160,000 |  |
Granted (in shares) | 18,835 | 160,000 |
Vested (in shares) | (32,000) |  |
Nonvested, ending balance (in shares) | 146,835 | 160,000 |
Restricted Stock Unit Transactions - Weighted average grant date fair value |  |  |
Nonvested, beginning balance (in dollar per share) | $ 29.95 |  |
Granted (in dollar per share) | 33.98 | $ 29.95 |
Vested (in dollar per share) | (29.95) |  |
Nonvested, ending balance (in dollar per share) | $ 33.98 | $ 29.95 |
Restricted share unit activity activity - Additional data |  |  |
Total compensation cost, net of estimated forfeitures, related to nonvested restricted share unit awards not yet recognized, pre tax | $ 3,154 | $ 4,392 |
Weighted-average period in years over which restricted share and share unit cost is expected to be recognized (in years) | 3 years 2 months 12 days | 4 years 2 months 12 days | 0 years
Total fair value of shares vested during the year | $ 958 |  |
Executive Officer |  |  |
Restricted Stock Unit Transactions - Shares |  |  |
Vesting period of options | 5 years |  |
Director |  |  |
Restricted Stock Unit Transactions - Shares |  |  |
Vesting period of options | 1 year |  |
Equity Incentive Plan 2016 |  |  |
Restricted Stock Unit Transactions - Shares |  |  |
Number of shares of common stock are available for issuance | 800,000 |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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