Capital Stock (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Common Stock Activity

Common stock activity is summarized as follows:

	Shares		Dollars
(Dollars in thousands)	Issued	Treasury	Common Stock		Treasury Cost
Balance at January 1, 2021	62,081,391	(23,013,489)	$	242,693	$	(326,156)
Restricted stock awards	—	53,934	(762)		762
Restricted stock expense	—	—	6,562		—
Restricted stock forfeitures	—	—	(765)		—
Stock options exercised	—	122,119	4,003		1,767
Stock option expense	—	—	90		—
Stock option forfeitures	—	—	(9)		—
Performance stock issued	—	64,543	(939)		939
Performance stock expense	—	—	13,227		—
Employee stock purchase plan	—	5,730	772		83
Treasury shares purchased	—	(37,710)	—		(6,171)
Acquisition of noncontrolling interest	—	—	(4,751)		—
Balances December 31, 2021	62,081,391	(22,804,873)	$	260,121	$	(328,776)
Restricted stock awards	—	52,810	(711)		711
Restricted stock expense	—	—	7,715		—
Restricted stock forfeitures	—	—	(1,227)		—
Stock options exercised	—	103,545	3,021		1,629
Stock option expense	—	—	49		—
Performance stock issued	—	55,447	(880)		880
Performance stock expense	—	—	15,843		—
Performance stock forfeitures	—	—	(2,730)		—
Employee stock purchase plan	—	7,412	779		112
Treasury shares purchased	—	(31,260)	—		(4,021)
Share repurchase program	—	(251,408)	—		(30,373)
Balances December 31, 2022	62,081,391	(22,868,327)	$	281,980	$	(359,838)
Restricted stock awards	—	40,856	(643)		643
Restricted stock expense	—	—	9,476		—
Restricted stock forfeitures	—	—	(1,414)		—
Stock options exercised	—	31,394	970		503
Stock option expense	—	—	11		—
Stock option forfeitures	—	—	(11)		—
Performance stock issued	—	53,407	(855)		855
Performance stock expense	—	—	23,546		—
Performance stock forfeitures	—	—	(1,585)		—
Employee stock purchase plan	—	7,140	849		114
Treasury shares purchased	—	(28,649)	—		(3,961)
Balances December 31, 2023	62,081,391	(22,764,179)	$	312,324	$	(361,684)