Equity Incentive Program (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock-based compensation expense [Abstract]
Pre-tax stock-based compensation expense	$ 6,441	$ 7,218	$ 18,723	$ 18,331
Tax benefit	(587)	(731)	(1,951)	(1,846)
Total stock-based compensation expense, net of tax	$ 5,854	$ 6,487	$ 16,772	$ 16,485
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)			359,715	335,285
Risk-free interest rate			3.91%	1.86%
Dividend yield			1.32%	1.25%
Expected life (years)			5 years 4 months 24 days	5 years 4 months 24 days
Volatility			30.65%	29.46%
Grant price (in dollars per share)			$ 153.25	$ 160.21
Fair value at date of grant (in dollars per share)			$ 47.27	$ 42.07
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)			43,656	40,087
Risk-free interest rate			4.28%	1.68%
Dividend yield			1.32%	1.25%
Expected life (years)			2 years 10 months 24 days	2 years 10 months 24 days
Volatility			27.30%	31.10%
Grant price (in dollars per share)			$ 153.25	$ 160.21
Fair value at date of grant (in dollars per share)			$ 249.48	$ 196.40
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)			82,055	76,509
Fair value at date of grant (in dollars per share)			$ 153.25	$ 160.21