Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Performance Shares [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

		2023		2022
Nonvested awards January 1,		16,514		13,870
Granted		11,320		10,395
Vested		(7,806)		(6,064)
Undistributed vested awards(c)		(1,249)		(1,687)
Nonvested awards December 31,		18,779		16,514
Weighted average fair Value of each nonvested award	$	92.18	$	76.87
Weighted average estimated payout % based on performance criteria		127.5%		109.2%

(c)Represents performance units that vested but were not distributed to retirement-eligible employees.

Restricted Stock Units Equity Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2023			2022
	Units	Weighted Average Grant Date Fair Value (per share)		Units	Weighted Average Grant Date Fair Value (per share)
Nonvested awards January 1,	27,370	$	69.28	13,126	$	65.83
Granted	20,472		69.95	15,931		72.46
Vested	(13,126)		65.83	—
Undistributed vested awards(a)	(1,249)		69.95	(1,687)		72.46
Nonvested awards December 31,	33,467	$	71.02	27,370	$	69.28

(a)Represents restricted stock units that vested but were not distributed to retirement-eligible employees.

Restricted Stock Units Liability Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2023	2022
Nonvested awards January 1,	—	6,064
Granted	—	—
Vested	—	(6,064)
Undistributed vested awards(b)	—	—
Nonvested awards December 31,	—	—

(b)Represents restricted stock units that vested but were not distributed to retirement-eligible employees.

2006 Performance Unit Plan and 2013 Director Incentive Plan [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2023		2022
	Director Incentive Plan	Performance Unit Plan	Director Incentive Plan	Performance Unit Plan
Nonvested awards January 1,	—	2,004	1,472	5,760
Granted	—	—	—	—
Vested	—	(2,004)	(1,472)	(3,756)
Nonvested awards December 31,	—	—	—	2,004