Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Performance Shares [Member]

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

Performance Unit Graded Vesting Schedule

The following activity occurred:

		2022		2021
Nonvested awards January 1,		13,870		7,003
Granted		10,395		10,187
Vested		(6,064)		—
Undistributed vested awards(c)		(1,687)		(3,320)
Nonvested awards December 31,		16,514		13,870
Weighted average fair Value of each nonvested award	$	76.87	$	104.76
Weighted average estimated payout % based on performance criteria		109.2%		127.4%

(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:

	2022			2021
	Units	Weighted Average Grant Date Fair Value (per share)		Units	Weighted Average Grant Date Fair Value (per share)
Nonvested awards January 1,	13,126	$	65.83	—		N/A
Granted	15,931	$	72.46	16,267	$	65.83
Vested	—			—
Undistributed vested awards(a)	(1,687)	$	72.46	(3,141)	$	65.83
Nonvested awards December 31,	27,370	$	69.28	13,126	$	65.83

(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:

	2022	2021
Nonvested awards January 1,	6,064	7,003
Granted	—	—
Vested	(6,064)	—
Undistributed vested awards(b)	—	(939)
Nonvested awards December 31,	—	6,064

(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:

	2022		2021
	Director Incentive Plan	Performance Unit Plan	Director Incentive Plan	Performance Unit Plan
Nonvested awards January 1,	1,472	5,760	4,286	17,420
Granted	—	—	—	—
Vested	(1,472)	(3,756)	(2,814)	(11,660)
Nonvested awards December 31,	—	2,004	1,472	5,760