STOCK-BASED AWARDS (Tables)

6 Months Ended

Jun. 30, 2022

STOCK-BASED AWARDS [Abstract]

Summary of Stock Option Activity

Stock option activity during the six months ended June 30, 2022 is summarized as follows:

	Option ‎Shares (thousands)	Weighted ‎average ‎exercise ‎price		Weighted ‎average ‎remaining ‎contractual ‎life (years)	Aggregate ‎intrinsic ‎value ‎(thousands)
Outstanding at December 31, 2021	9,462	$	48.01
Granted	1,604		65.04
Exercised	(274)		41.56
Forfeited	(593)		59.84
Outstanding at June 30, 2022	10,199	$	50.19	6.9	$	96,142
Exercisable at June 30, 2022	5,557	$	42.62	5.8	$	79,720
Expected to vest at June 30, 2022	4,642	$	59.26	8.2	$	16,423

Fair Value of Options Using Black Scholes Option Pricing Model

The fair value of the options was estimated on the date of the grant using a Black-Scholes option pricing model with the following assumptions:

	Six Months Ended
	June 30,
	2022			2021
Risk-free interest rate	1.46%	-	3.36%	0.40%	-	0.84%
Expected term (years)	4.7	-	4.8	4.8
Expected volatility	34.0%	-	35.0%		34.0%
Expected dividend yield		—%			—%

Summary of Restricted Stock Unit Activity

	Restricted Stock ‎Units (thousands)	Weighted ‎average ‎grant date fair value ‎per share		Weighted ‎average ‎remaining ‎contractual ‎life (years)
Outstanding at December 31, 2021	29	$	72.54
Granted	6		66.08
Vested	—		—
Forfeited	—		—
Outstanding at June 30, 2022	35	$	71.37	8.3

Stock-based Compensation Schedule

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2022		2021		2022		2021
Stock-based compensation expense	$	7,837	$	7,632	$	15,989	$	15,330
Net stock-based compensation capitalized into inventory		184		156		384		341
Total stock-based compensation cost	$	8,021	$	7,788	$	16,373	$	15,671