Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 1.90	$ 1.90	$ 1.65	$ 1.65	$ 7.10	$ 6.30	$ 4.64
Dividends					$ 53,500
Dividends payable	$ 17,291				$ 17,291	$ 15,812
Repurchases of common shares (in shares)					223,807
Weighted average price (in dollars per share)					$ 200.73
Total cost of shares repurchased					$ 45,200
Shares available for repurchase (in shares)	604,545				604,545