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EMPLOYEE BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2023

Compensation Related Costs [Abstract]

Schedule of Option Activity

Option activity was as follows:

			Number of Shares						Range of Exercise Price						Weighted- Average Exercise Price						Weighted- Average Remaining Contract Life (in years)						Aggregate Intrinsic Value (in millions)
Outstanding at December 31, 2020			2,023,100						$10.22 - $66.65						$	34.18					6.99						$	117.8
Granted			159,000						$91.98						$	91.98
Exercised			(206,000)						$20.49 - $39.82						$	30.78
Outstanding at December 31, 2021			1,976,100						$10.22 - $91.98						$	39.18					6.24						$	80.8
Granted			202,100						$67.29						$	67.29
Exercised			—
Canceled or expired			—
Outstanding at December 31, 2022			2,178,200						$10.22 - $91.98						$	41.79					5.60						$	79.6
Granted			140,800						$76.78						$	76.78
Exercised			(419,340)						$10.22 - $34.21						$	17.77
Canceled or expired			—
Outstanding at December 31, 2023			1,899,660						$20.49 - $91.98						$	49.69					5.53						$	72.4
Exercisable at December 31, 2021			1,473,420						$10.22 - $66.65						$	29.55					5.59						$	72.9
Exercisable at December 31, 2022			1,766,070						$10.22 - $91.98						$	34.40					4.96						$	76.5
Exercisable at December 31, 2023			1,571,105						$20.49 - $91.98						$	44.32					4.93						$	68.1

Fair Value Assumption for Options Granted

The Company estimated the fair value of each option granted on the date of grant using the Black-Scholes option-pricing model, using the assumptions in the following table:

			Year Ended December 31,
			2023						2022						2021
Dividend yield			0		%				0		%				0		%
Expected volatility			35		%				31		%				30		%
Risk-free interest rate			3.96		%				1.89		%				0.56		%
Expected life (in years)			5						5						5
Weighted-average grant date fair value			$	28.87					$	20.43					$	25.09

The assumptions used to estimate the fair value of awards with both a performance and a market condition were as follows:

			Year Ended December 31,
			2023						2022						2021
Dividend yield			0		%				0		%				0		%
Expected volatility			37		%				34		%				42		%
Risk-free interest rate			4.31		%				1.71		%				0.20		%
Expected life (in years)			3						3						3
Weighted-average grant date fair value			$	81.58					$	71.19					$	99.73

Summarized Information Regarding Options Outstanding

The following table summarizes information regarding options outstanding at December 31, 2023:

						Options Outstanding																		Options Exercisable
Range of Exercise Price						Number of Shares						Weighted-Average Remaining Contractual Life (in years)						Weighted- Average Exercise Price						Number of Shares						Weighted- Average  Exercise Price
$20.49 - $27.35						346,000						3.16						$	20.49					346,000						$	20.49
$27.36 - $37.02						354,090						4.16						$	34.21					354,090						$	34.21
$37.03 - $53.24						385,670						5.10						$	39.82					385,670						$	39.82
$53.25 - $66.97						312,000						6.10						$	66.65					312,000						$	66.65
$66.98 - $91.98						501,900						8.09						$	77.77					173,345						$	82.39
						1,899,660						5.53						$	49.69					1,571,105						$	44.32

Unvested Restricted Stock Awards Activity

The following table presents unvested restricted stock awards activity for the year ended December 31, 2023:

			Restricted Stock Awards — without Market Condition												Restricted Stock Awards — with Market Condition
			Number of Shares						Weighted-Average Grant Date Fair Value per Share						Number of Shares						Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock awards at December 31, 2022			2,061,894						$	67.15					620,880						$	80.55
Granted			1,096,446						$	73.27					283,440						$	81.58
Vested			(787,883)						$	66.51					(90,408)						$	72.69
Canceled			(230,546)						$	68.58					(132,792)						$	72.69
Unvested restricted stock awards at December 31, 2023			2,139,911						$	70.38					681,120						$	83.56

The following table presents unvested restricted stock units activity for the year ended December 31, 2023:

			Number of Units						Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock units at December 31, 2022			21,560						$	65.24
Granted			10,465						$	70.74
Vested			(8,129)						$	65.77
Canceled			(977)						$	68.34
Unvested restricted stock units at December 31, 2023			22,919						$	67.43

The following tables presents the Matching RSU activity for the year ended December 31, 2023:

			Number of Matching RSU Shares						Weighted-Average Grant Date Fair Value per Share
Unvested MSPP restricted stock units at December 31, 2022			180,431						$	60.52
Granted			82,374						$	67.36
Vested			(52,710)						$	46.91
Canceled			(13,128)						$	66.67
Unvested MSPP restricted stock units at December 31, 2023			196,967						$	66.61

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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