Shareholders' Equity (Schedule of Activity in Shareholders' Equity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Oct. 25, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, balance at the beginning of the period (in shares)	31,200,000	31,100,000
Balance at end of the period	$ 967,320,000	$ 867,543,000	$ 877,605,000
Treasury stock, balance at the beginning of the period (in shares)	9,661,845
Net income	$ 88,055,000	111,610,000	96,508,000
Compensation and benefits paid or payable in shares	3,812,000	5,851,000	3,727,000
Options exercised			17,000
Shares issued to Directors'	$ 903,000	1,085,000	1,085,000
Purchase of treasury shares (in shares)	1,022,717			285,286
Purchase of treasury shares	$ (14,545,000)		(85,065,000)
Dividends paid to noncontrolling interests	(166,000)	0
Cumulative translation adjustments	(57,463,000)	22,409,000	(40,861,000)
Initial equity related to Noncontrolling interest in Arcari		509,000
Pension and postretirement liability adjustments	3,018,000	(1,563,000)	(3,491,000)
Settlement of certain pension liabilities			26,198,000
Derivative valuation adjustment	$ (9,185,000)	$ (8,628,000)	$ 19,321,000
Common stock, balance at the end of the period (in shares)	31,100,000	31,200,000	31,100,000
Balance at end of the period	$ 948,947,000	$ 967,320,000	$ 867,543,000	$ 877,605,000
Treasury stock, balance at the end of the period (in shares)	9,844,746	9,661,845
Dividends declared per share, Class A and Class B (in dollars per share)	$ 1.05	$ 1.01	$ 0.88
Stock repurchase program, authorized amount	$ 200,000,000				$ 200,000,000
Common Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared	$ (32,802,000)	$ (31,496,000)	$ (27,501,000)
Dividends declared per share, Class A and Class B (in dollars per share)	$ 1.05	$ 1.01	$ 0.88
Common Stock | Common Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, balance at the beginning of the period (in shares)	40,856,000	40,785,000	40,760,000
Balance at end of the period	$ 41,000	$ 41,000	$ 41,000
Compensation and benefits paid or payable in shares (in shares)	51,000	71,000	24,000
Options exercised (in shares)			1,000
Shares issued to Directors' (in shares)	10,000
Common stock, balance at the end of the period (in shares)	40,917,000	40,856,000	40,785,000	40,760,000
Balance at end of the period	$ 41,000	$ 41,000	$ 41,000	$ 41,000
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at end of the period	448,218,000	441,540,000	436,996,000
Compensation and benefits paid or payable in shares	3,812,000	5,851,000	3,727,000
Options exercised			17,000
Shares issued to Directors'	903,000	827,000	800,000
Balance at end of the period	452,933,000	448,218,000	441,540,000	436,996,000
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at end of the period	1,010,942,000	931,318,000	863,057,000
Net income	87,623,000	111,120,000	95,762,000
Balance at end of the period	1,065,763,000	1,010,942,000	931,318,000	863,057,000
Retained earnings | Common Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared	(32,802,000)	(31,496,000)	(27,501,000)
Accumulated items of other comprehensive income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at end of the period	(133,168,000)	(144,927,000)	(145,984,000)
Cumulative translation adjustments	(56,654,000)	21,950,000	(40,971,000)
Pension and postretirement liability adjustments	3,018,000	(1,563,000)	(3,491,000)
Settlement of certain pension liabilities			26,198,000
Derivative valuation adjustment	(9,185,000)	(8,628,000)	19,321,000
Balance at end of the period	(195,989,000)	(133,168,000)	(144,927,000)	(145,984,000)
Treasury Stock, Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at end of the period	$ (364,665,000)	$ (364,923,000)	$ (280,143,000)
Treasury stock, balance at the beginning of the period (in shares)	9,662,000	9,675,000	8,665,000
Shares issued to Directors'		$ 258,000	$ 285,000
Shares issued to Directors' (in shares)		13,000	13,000
Purchase of treasury shares (in shares)	182,901		1,022,717
Purchase of treasury shares	$ (14,545,000)		$ (85,065,000)	(24,400,000)
Balance at end of the period	$ (379,210,000)	$ (364,665,000)	$ (364,923,000)	$ (280,143,000)
Treasury stock, balance at the end of the period (in shares)	9,845,000	9,662,000	9,675,000	8,665,000
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at end of the period	$ 5,952,000	$ 4,494,000	$ 3,638,000
Net income	432,000	490,000	746,000
Dividends paid to noncontrolling interests	(166,000)
Cumulative translation adjustments	(809,000)	459,000	110,000
Initial equity related to Noncontrolling interest in Arcari		509,000
Balance at end of the period	$ 5,409,000	$ 5,952,000	$ 4,494,000	$ 3,638,000