Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022	1,669,325	$	78.63
Granted	344,100		109.50
Exercised	(308,280)		54.42
Cancelled or forfeited	(9,485)		86.40
Outstanding as of December 31, 2022	1,695,660	$	82.42	4.90	$	82,835
Exercisable at December 31, 2022	782,067	$	67.54	3.47	$	49,839

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

	2022			2021			2020
Weighted-average fair value of grants	$	21.43		$	17.11		$	13.24
Risk-free interest rates		2.95	%		0.75	%		0.39	%
Dividend yield		2.50	%		2.06	%		2.30	%
Expected volatility		22.89	%		22.73	%		22.67	%
Expected option life		5.05	years		4.97	years		4.96	years

Schedule of Restricted Stock Units Activity

		Weighted
		Average
		Grant Date
	RSUs	Fair Value
Nonvested at January 1, 2022	45,068	$	97.67
Granted	19,268		115.71
Reinvested	2,632		127.48
Vested	(21,380)		93.07
Forfeited	(1,380)		77.92
Nonvested at December 31, 2022	44,208	$	109.51