Equity Incentive Program - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Total stock based compensation expense, before tax	$ 103	$ 58	$ 672	$ 632
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)			345,354	349,491
Fair value per share at date of grant (in dollars per share)			$ 51.17	$ 47.27
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)			43,602	43,656
Fair value per share at date of grant (in dollars per share)			$ 287.62	$ 249.48
Award vesting period			3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)			87,755	85,053
Fair value per share at date of grant (in dollars per share)			$ 160.11	$ 153.25
Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per share at date of grant (in dollars per share)			$ 177.19