Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 118,478	$ 98,589	$ 132,398
Weighted average number of shares:
Weighted average number of shares used in calculating basic net income per share	32,348	32,329	32,296
Effect of dilutive stock-based compensation plans:
Stock options	2	7	12
Long-term incentive plan	113	20	14
Weighted average number of shares used in calculating diluted net income per share	32,463	32,356	32,322
Average market price of common stock used for calculation of dilutive shares	$ 82.88	$ 58.56	$ 78.13
Net income per share:
Basic (in dollars per share)	3.66	3.05	4.10
Diluted (in dollars per share)	$ 3.65	$ 3.05	$ 4.10
Common stock, shares, outstanding (in shares)	32,100	32,300	32,300