Equity, Restricted Shares (Details) - Restricted Shares - 2012 Directors Restricted Stock Plan - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May 17, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-Based Compensation
Remaining shares available for granting under plan		0
Restricted share activity
Restricted shares outstanding at the beginning of the period (in shares)		21,312	21,061	26,350
Restricted shares granted (in shares)		0	21,312	21,983
Shares vested and issued (in shares)	(21,312)	(21,312)	(21,061)	(27,272)
Restricted shares outstanding at the end of the period (in shares)		0	21,312	21,061	26,350
Fair Value at Grant Date
Fair value at the grant date, restricted shares outstanding at the beginning of the period (in dollars per share)		$ 67.59	$ 66.92	$ 45.55
Fair value of restricted shares vested and issued (in dollars per share)		67.59	66.92	45.80
Fair value of restricted shares granted (in dollars per share)		0	67.59	66.33
Fair value at the grant date, restricted shares outstanding at the end of the period (in dollars per share)		$ 0	$ 67.59	$ 66.92	$ 45.55
Weighted Average Remaining Amortization Term (in years)		0 years	4 months 13 days	4 months 17 days	4 months 17 days
Total fair value of restricted share awards vested (in dollars)		$ 1.4	$ 1.4	$ 1.2