Equity Incentive Program (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stock-based compensation expense [Abstract]
Pre-tax stock-based compensation expense	$ 11,113	$ 11,521
Tax benefit	(1,115)	(1,222)
Total stock-based compensation expense, net of tax	$ 9,998	$ 10,299
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)	327,940
Risk-free interest rate (in percent)	1.86%	0.59%
Dividend yield (in percent)	1.25%	1.62%
Expected life (years)	5 years 4 months 24 days	5 years 6 months
Volatility (in percent)	29.46%	30.49%
Grant price (in dollars per share)	$ 160.21	$ 122.73
Fair value at date of grant (in dollars per share)	$ 42.07	$ 29.08
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)	40,087
Risk-free interest rate (in percent)	1.68%	0.19%
Dividend yield (in percent)	1.25%	1.62%
Expected life (years)	2 years 10 months 24 days	2 years 10 months 24 days
Volatility (in percent)	31.10%	31.90%
Grant price (in dollars per share)	$ 160.21	$ 122.73
Fair value at date of grant (in dollars per share)	$ 196.40	$ 148.29
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued during period (in shares)	71,961