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Retirement and Share-based Compensation Plans (Changes in Stock Options Outstanding) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-Based Payment Arrangement [Abstract] |  |  |  |
Outstanding, number of shares | 691,511 | 1,786,794 | 2,062,719 | 1,257,917
Outstanding, weighted-average exercise price per share | $ 27.79 | $ 28.18 | $ 27.84 | $ 25.10
Outstanding, total exercise price | $ 19,219 | $ 50,347 | $ 57,428 | $ 31,576
Granted, number of shares | 0 | 0 | 1,246,605 |
Granted, weighted-average exercise price per share | $ 0 | $ 0 | $ 29.15 |
Granted, total exercise price | $ 0 | $ 0 | $ 36,336 |
Canceled, number of shares | (4,864) | (102,143) | (146,803) |
Canceled, weighted-average exercise price per share | $ 28.37 | $ 27.49 | $ 25.44 |
Canceled, total exercise price | $ (138) | $ (2,808) | $ (3,735) |
Exercised, number of shares | (1,090,419) | (173,782) | (295,000) |
Exercised, weighted-average exercise price per share | $ 28.42 | $ 24.59 | $ 22.88 |
Exercised, total exercise price | $ (30,990) | $ (4,273) | $ (6,749) |

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- Definition Total exercise price attributable to options exercised in the period based upon the number of options exercised and their weighted average exercise price. + References No definition available. + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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