Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2023

Compensation And Retirement Disclosure [Abstract]

Summary of Option Activity

				Weighted	Aggregate
		Weighted		Average	Intrinsic
		Average		Remaining	Value
	Options	Exercise Price		Contractual Life	(in 000’s)
Outstanding as of January 1, 2023	1,695,660	$	82.42
Granted	201,125		135.46
Exercised	(246,490)		57.27
Forfeited or expired	(8,585)		96.99
Outstanding as of December 31, 2023	1,641,710	$	92.62	4.62	$	66,995
Exercisable at December 31, 2023	872,462	$	78.24	3.46	$	47,884

Summary of Weighted Average Grant-date Assumptions and Weighted Average Fair Values

	2023			2022			2021
Weighted-average fair value of grants	$	27.24		$	21.43		$	17.11
Risk-free interest rates		3.59	%		2.95	%		0.75	%
Dividend yield		2.28	%		2.50	%		2.06	%
Expected volatility		22.97	%		22.89	%		22.73	%
Expected option life		4.96	years		5.05	years		4.97	years

Schedule of Restricted Stock Units Activity

		Weighted
		Average
		Grant Date
	RSUs	Fair Value
Nonvested at January 1, 2023	44,208	$	109.51
Granted	22,013		136.04
Reinvested	1,058		131.11
Vested	(19,957)		103.61
Forfeited	(2,229)		118.00
Nonvested at December 31, 2023	45,093	$	125.16