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Stock-Based Compensation Plans - Summary of changes in outstanding options (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Stock option grants |  |  |
Number Of Shares |  |  |
Outstanding at beginning of period (shares) |  | 126,880 |
Outstanding at end of period (shares) | 159,410 | 159,410 | 126,880
Exercisable (shares) | 126,880 | 126,880 |
Vested (shares) | 0 |  |
Weighted Average Exercise Price |  |  |
Outstanding at beginning of period (usd per share) |  | $ 20.00 |
Outstanding at end of period (usd per share) | $ 22.33 | 22.33 | $ 20.00
Exercisable (usd per share) | $ 20.00 | $ 20.00 |
Weighted Average Remaining Term (yrs) |  |  |
Weighted Average Remaining Term |  | 4 years 3 months 18 days | 3 years 6 months
Exercisable, Weighted Average Remaining Term |  | 3 years |
Weighted Average Grant Date Fair Value |  |  |
Options outstanding, weighted average fair value | $ 1,381 | $ 1,381 | $ 981
Exercisable, Weighted Average Grant Date Fair Value | 981 | $ 981 |
Vested, Weighted Average Grant Date Fair Value | $ 0 |  |
Time-based awards granted |  |  |
Number Of Shares |  |  |
Granted (shares) |  | 12,200 |
Weighted Average Exercise Price |  |  |
Granted (usd per share) |  | $ 31.44 |
Weighted Average Grant Date Fair Value |  |  |
Granted, Weighted Average Grant Date Fair Value |  | $ 150 |
Performance-based awards granted |  |  |
Number Of Shares |  |  |
Granted (shares) |  | 20,330 |
Weighted Average Exercise Price |  |  |
Granted (usd per share) |  | $ 31.44 |
Weighted Average Grant Date Fair Value |  |  |
Granted, Weighted Average Grant Date Fair Value |  | $ 250 |

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- Definition The number of grants made 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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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (e)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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