Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 95,762	$ 118,478	$ 98,589
Weighted average number of shares:
Weighted average number of shares used in calculating basic net income per share (in shares)	31,339	32,348	32,329
Effect of dilutive stock-based compensation plans:
Stock options	0	2	7
Long-term incentive plans	116	113	20
Weighted average number of shares used in calculating diluted net income per share (in shares)	31,455	32,463	32,356
Average market price of common stock used for calculation of dilutive shares (in dollars per share)	$ 87.27	$ 82.88	$ 58.56
Net income per share:
Earnings per share attributable to Company shareholders - Basic (in dollars per share)	3.06	3.66	3.05
Earnings per share attributable to Company shareholders - Diluted (in dollars per share)	$ 3.04	$ 3.65	$ 3.05
Common stock, shares, outstanding (in shares)	31,100	32,100	32,300