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v3.24.0.1

Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | May 31, 2020
2020 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Issuance of Common stock |  |  |  |  | 700,000
Future issuances | 169,809 |  |  |  |
Restricted Shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Recognized share based compensation | $ 4.6 | $ 3.9 | $ 3.5 |  |
Unrecognized compensation, other than options | $ 9.6 |  |  |  |
Unrecognized compensation recognition period | 2 years 4 months 24 days |  |  |  |
Fair value inputs forfeiture rate | 0.00% |  |  |  |
Intrinsic value of restricted shares | $ 2.7 | $ 1.9 | $ 1.8 |  |
Shares Outstanding, granted | 82,000 | 81,000 | 87,000 |  |
Fair value of shares granted to directors | $ 73.15 | $ 63.10 | $ 65.23 |  |
Restricted Shares | Prior To 2023 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 5 years |  |  |  |
Restricted Shares | During 2023 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Restricted Shares | Director |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 1 year |  |  |  |
Recognized share based compensation | $ 1.1 | $ 0.7 |  |  |
Fair value inputs forfeiture rate | 0.00% |  |  |  |
Shares Outstanding, granted | 14,535 | 10,636 |  |  |
Fair value of shares granted to directors | $ 73.27 | $ 62.62 |  |  |
Performance units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years | 3 years |  |  |
Shares Outstanding, granted | 47,000 | 34,000 |  |  |
Fair value of shares granted to directors | $ 80.34 | $ 68.59 |  |  |
Performance units and shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years | 3 years | 3 years | 3 years |
Fair value inputs forfeiture rate | 0.00% |  |  |  |
Amortization period of compensation expense | 5 years |  |  |  |
Shares Outstanding, granted | 33,000 | 28,000 | 43,000 |  |
Fair value of shares granted to directors | $ 90.17 | $ 66.96 | $ 63.42 |  |
Performance units and shares [Member] | Prior To 2023 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Performance units and shares [Member] | During 2023 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Performance units and shares [Member] | 3 Year Performance period to be completed |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Recognized share based compensation | $ 2.2 | $ 1.5 | $ 1.2 |  |
Unrecognized compensation, other than options | $ 4.4 |  |  |  |
Unrecognized compensation recognition period | 2 years 2 months 12 days |  |  |  |
Vesting percentage | 50.00% |  |  |  |
Performance units and shares [Member] | 3 Year Performance period completed |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Recognized share based compensation | $ 0.5 | $ 0.4 | $ 0.2 |  |
Unrecognized compensation, other than options | $ 0.2 |  |  |  |
Unrecognized compensation recognition period | 10 months 24 days |  |  |  |
Vesting percentage | 50.00% |  |  |  |
Performance units and shares [Member] | Maximum | Prior To 2023 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 5 years |  |  |  |

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