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Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | May 31, 2020
2020 Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Issuance of Common stock |  |  |  |  |  | 700,000
Common Stock, Capital Shares Reserved for Future Issuance | 327,092 |  | 327,092 |  |  |
Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  | 5 years |  |  |
Recognized share based compensation | $ 1.1 | $ 1.0 | $ 2.1 | $ 1.8 |  |
Unrecognized compensation, other than options | 11.4 |  | $ 11.4 |  |  |
Unrecognized compensation recognition period |  |  | 3 years 8 months 12 days |  |  |
Fair value inputs forfeiture rate |  |  | 0.00% |  |  |
Intrinsic value of restricted shares |  |  | $ 1.8 | 1.8 |  |
Shares Outstanding, granted |  |  | 78,000 |  |  |
Fair value of shares granted to directors |  |  | $ 62.72 |  |  |
Restricted Stock [Member] | Director |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  | 1 year |  |  |
Recognized share based compensation | 0.2 |  | $ 0.3 |  |  |
Unrecognized compensation, other than options | 0.3 |  | $ 0.3 |  |  |
Fair value inputs forfeiture rate |  |  | 0.00% |  |  |
Shares Outstanding, granted |  |  | 10,636 |  |  |
Fair value of shares granted to directors |  |  | $ 62.62 |  |  |
Performance Units And Shares [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  | 3 years |  | 3 years |
Fair value inputs forfeiture rate |  |  | 0.00% |  |  |
Amortization period of compensation expense |  |  | 5 years |  |  |
Shares Outstanding, granted |  |  | 34,000 |  |  |
Fair value of shares granted to directors |  |  | $ 68.59 |  |  |
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 | 0.4 | 0.4 | $ 0.7 | 0.7 |  |
Unrecognized compensation, other than options | 4.2 |  | $ 4.2 |  |  |
Unrecognized compensation recognition period |  |  | 3 years 8 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 | 0.1 | $ 0.1 | $ 0.2 | $ 0.2 |  |
Unrecognized compensation, other than options | $ 0.4 |  | $ 0.4 |  |  |
Unrecognized compensation recognition period |  |  | 1 year 2 months 12 days |  |  |
Vesting percentage |  |  | 50.00% |  |  |
Performance Units And Shares [Member] | Maximum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  | 5 years |  |  |

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