Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

The following tables summarize option activity for the six-month period ended June 30, 2022:

						Weighted		Aggregate
				Weighted		Average		Intrinsic
				Average		Remaining		Value
	Options			Exercise Price		Contractual Life		(in 000’s)
Outstanding options at January 1, 2022		1,669,325		$	78.63
Options granted		296,100			115.65
Options exercised		(88,047	)		59.38
Options canceled/forfeited		(7,590	)		90.80
Outstanding options at June 30, 2022		1,869,788		$	85.35		5.06	$	58,408
Exercisable options at June 30, 2022		905,015		$	69.91		3.58	$	42,245

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

The fair value of options was estimated using a Black-Scholes based option pricing model with the following weighted average grant-date assumptions and weighted average fair values as of June 30:

	2022			2021
Weighted-average fair value of grants	$	21.05		$	17.00
Risk-free interest rates		2.84	%		0.69	%
Dividend yield		2.50	%		2.07	%
Expected volatility		22.89	%		22.73	%
Expected option life		5.06	years		4.97	years

Schedule of Restricted Stock Units Activity

				Weighted
				Average
				Grant Date
	RSUs			Fair Value
Nonvested at January 1, 2022		45,068		$	97.67
Granted		16,705			116.60
Reinvested		197			108.86
Vested		(21,380	)		93.07
Forfeited		(1,030	)		96.30
Nonvested at June 30, 2022		39,560		$	108.24