STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2022

STOCK-BASED COMPENSATION

Schedule of weighted-average assumptions used to estimate the fair value of options granted

	2022		2021		2020
Dividend yield	0.0	%	0.0	%	0.0	%
Expected volatility	27.7	%	28.9	%	30.4	%
Risk-free interest rate	2.15	%	0.85	%	0.70	%
Expected term	6.1 Years		5.8 Years		5.8 Years

Summary of activities with respect to its stock option plans

				Weighted-
		Weighted-		Average
		Average		Remaining
	Number of	Exercise		Contractual	Aggregate
	Shares	Price Per		Term (in	Intrinsic
Options	(in thousands)	Share		years)	Value
Outstanding at January 1, 2022	13,860	$	48.19	5.1	$	663,148
Granted 01/01/22 - 03/31/22	2,489	$	73.96
Granted 04/01/22 - 06/30/22	8	$	88.05
Granted 07/01/22 - 09/30/22	34	$	95.72
Granted 10/01/22 - 12/31/22	32	$	91.10
Exercised	(1,411)	$	45.37
Cancelled or forfeited	(157)	$	72.15
Outstanding at December 31, 2022	14,855	$	52.75	5.0	$	724,651
Vested and expected to vest in the future at December 31, 2022	14,509	$	52.22	4.9	$	715,462
Exercisable at December 31, 2022	9,764	$	42.81	3.4	$	573,325

Summary of information about stock options outstanding and exercisable

					Options Outstanding				Options Exercisable
						Weighted Average
						Remaining	Weighted		Number	Weighted
					Number	Contractual	Average		Exercisable	Average
Range of Exercise					Outstanding	Term	Exercise		(In	Exercise
Prices ($)					(In Thousands)	(Years)	Price ($)		Thousands)	Price ($)
$	15.71	-	$	36.05	2,768	0.8	$	20.75	2,768	$	20.75
$	37.10	-	$	43.99	1,751	3.3	$	43.43	1,751	$	43.43
$	44.92	-	$	46.27	2,189	3.2	$	45.60	2,189	$	45.60
$	48.11	-	$	57.95	529	5.5	$	53.29	313	$	52.96
$	58.73	-	$	58.73	1,818	5.2	$	58.73	1,310	$	58.73
$	58.77	-	$	62.39	2,247	6.6	$	60.80	1,252	$	60.53
$	62.92	-	$	67.42	43	6.1	$	64.19	26	$	63.46
$	73.23	-	$	73.23	2,263	9.2	$	73.23	—	$	—
$	77.92	-	$	97.80	1,237	8.4	$	88.32	155	$	89.02
$	98.49	-	$	98.49	10	9.6	$	98.49	—	$	—
					14,855	5.0	$	52.75	9,764	$	42.81

Summary of activities with respect to non-vested restricted stock units and performance share units

		Weighted
	Number of	Average
	Shares (in	Grant-Date
	thousands)	Fair Value
Non-vested at January 1, 2022	910	$	69.02
Granted 01/01/22 - 03/31/221	484	$	71.88
Granted 04/01/22 - 06/30/22	15	$	87.52
Granted 07/01/22 - 09/30/22	6	$	95.17
Granted 10/01/22 - 12/31/22	1	$	90.29
Vested	(389)	$	64.59
Forfeited/cancelled	(14)	$	68.27
Non-vested at December 31, 2022	1,013	$	72.54

Schedule of employee and non-employee share-based compensation expense

	2022		2021		2020
Operating expenses	$	64,109	$	70,483	$	70,289
Total employee and non-employee share-based compensation expense included in income, before income tax		64,109		70,483		70,289
Less: Amount of income tax benefit recognized in earnings		(13,175)		(14,228)		(15,499)
Amount charged against net income	$	50,934	$	56,255	$	54,790