Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Actuarially Determined Long-Term Liability Adjustments, Tax	$ (183)	$ (32,414)	$ (26,506)
Interest rate hedge, tax	$ 0	$ (116)	$ (596)
Stock repurchased and retired during period (in shares)	5,224,016	124,454	0
Dividends on common shares (in dollars per share)	$ 2.20	$ 2.05	$ 0
OCI, debt securities, available-for-sale, gain (loss), after adjustment, tax	$ (23)	$ 0	$ 0

Aggregate dividends declared during the period for each share of common stock outstanding.

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