Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Nonvested Share Activity [Table Text Block]

The following represents a summary of the non-vested shares for the three years ended December 31, 2023 (in thousands):

	Restricted Stock			Restricted Stock Units
	Shares	Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021	420,234			69,669
Granted	247,917	$	73.01	17,570	$	88.25
Vested	(166,965)	94.96		—	—
Forfeited	(11,632)	75.83		—	—
Non-vested at December 31, 2021	489,554			87,239
Granted	183,809	$	108.23	25,416	$	103.79
Vested	(139,859)	76.80		(61,645)	91.38
Forfeited	(40,620)	79.60		—	—
Non-vested at December 31, 2022	492,884			51,010
Granted	180,178	$	97.56	7,275	$	102.35
Vested	(103,515)	82.85		(6,894)	77.36
Forfeited	(30,557)	95.17		—	—
Non-vested at December 31, 2023	538,990			51,391