Earnings Per Common Share and Summary of Share-Based Award Transactions (Details) - SARs - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, SARS, Outstanding [Roll Forward]
Number Of Shares, Outstanding Beginning Balance	39	35
Number Of Shares, SARs granted	5	10
Number Of Shares, SARs exercised	(2)	(6)
Number Of Shares, Outstanding Ending Balance	42	39	35
Number Of Shares, Exercisable as of December 31, 2023	34
Number Of Shares, Unvested as of December 31, 2023	8
Share-based Compensation Arrangement by Share-based Payment Award, SARS, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 159.39	$ 150.36
Weighted Average Exercise Price, SARs granted	142.88	155.16
Weighted Average Exercise Price, SARs exercised	93.87	94.44
Weighted Average Exercise Price, Outstanding Ending Balance	160.83	$ 159.39	$ 150.36
Weighted Average Exercise Price, Exercisable as of December 31, 2023	165.33
Weighted Average Exercise Price, Unvested as of December 31, 2023	$ 142.58
Average Remaining Contractual Term, Outstanding Beginning Balance	3 years 8 months 8 days	4 years 1 month 6 days	3 years 11 months 15 days
Average Remaining Contractual Term, Exercisable as of December 31, 2023	3 years 4 months 17 days
Average Remaining Contractual Term, Unvested as of December 31, 2023	4 years 11 months 4 days
Aggregate Intrinsic Value, Outstanding Beginning Balance	$ 243	$ 1,643
Aggregate Intrinsic Value, Outstanding Ending Balance	428	$ 243	$ 1,643
Aggregate Intrinsic Value, Exercisable as of December 31, 2023	265
Aggregate Intrinsic Value, Unvested as of December 31, 2023	$ 163