Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to the Company	$ 27,737	$ 27,582
Weighted average number of shares:
Weighted average number of shares used in calculating basic net income per share (in shares)	31,877	32,352
Effect of dilutive stock-based compensation plans:
Weighted average number of shares used in calculating diluted net income per share (in shares)	31,961	32,401
Average market price of common stock used for calculation of dilutive shares (in dollars per share)	$ 86.09	$ 79.30
Net income attributable to the Company per share:
Earnings per share attributable to Company shareholders - Basic (in dollars per share)	0.87	0.85
Earnings per share attributable to Company shareholders - Diluted (in dollars per share)	$ 0.87	$ 0.85
Stock options
Effect of dilutive stock-based compensation plans:
Weighted average number diluted shares outstanding adjustment (in shares)	0	3
RSU And MPP
Effect of dilutive stock-based compensation plans:
Weighted average number diluted shares outstanding adjustment (in shares)	84	46