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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 |

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