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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
	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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Total exercise price attributable to options forfeited in the period based upon the number of options forfeited and their weighted average exercise price.

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Total exercise price attributable to options granted in the period based upon the number of options granted and their weighted average exercise price.

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Total exercise prices of options outstanding based upon the weighted average excercise prices and number of options.

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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
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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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