Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Actuarially Determined Long-Term Liability Adjustments, Tax	$ (32,414)	$ (26,506)	$ (4,868)
Interest rate hedge, tax	$ (116)	$ (596)	(674)
Income tax effects allocated directly to equity			$ (1,109)
Stock repurchased and retired during period (in shares)	124,454	0	0
Dividends on common shares (in dollars per share)	$ 2.05	$ 0	$ 0