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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	May 31, 2020
2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of Common stock					700,000
Future issuances	33,907
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years			5 years
Recognized share based compensation	$ 1.3	$ 1.0
Unrecognized compensation, other than options	$ 14.1
Unrecognized compensation recognition period	2 years 6 months
Fair value inputs forfeiture rate	0.00%
Intrinsic value of restricted shares	$ 2.2	2.6
Shares Outstanding, granted	101,000
Fair value of shares granted to directors	$ 57.51
Restricted Shares \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Recognized share based compensation	$ 0.3	0.3
Unrecognized compensation, other than options	$ 1.0
Fair value inputs forfeiture rate	0.00%
Shares Outstanding, granted	23,389		14,535
Fair value of shares granted to directors	$ 57.51		$ 73.27
Performance units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years		3 years
Shares Outstanding, granted	77,000
Fair value of shares granted to directors	$ 59.16
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	23,000
Fair value of shares granted to directors	$ 63.42
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	$ 0.6	0.4
Unrecognized compensation, other than options	$ 7.9
Unrecognized compensation recognition period	2 years 6 months
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	$ 0.2	$ 0.2
Unrecognized compensation, other than options	$ 0.5
Unrecognized compensation recognition period	1 year 4 months 24 days
Vesting percentage	50.00%
Performance units and shares [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years