Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Summary of Restricted Stock Unit and PSU Activity

The following table summarizes restricted stock awards activity for the three months ended March 31, 2024:

	Time-Based					Market-Based
	Restricted Stock Awards					Restricted Stock Awards
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
Unvested shares of restricted stock outstanding at December 31, 2023		904.0		$	293.74		1,745.5		$	124.38
Granted		451.4		$	185.46		187.1		$	167.48
Vested		(36.7	)	$	265.98		—		$	—
Forfeited		(37.8	)	$	290.52		(1,620.3	)	$	110.53
Unvested shares of restricted stock outstanding at March 31, 2024		1,280.9		$	256.48		312.3		$	222.04

The following table summarizes PSU and RSU activity for the three months ended March 31, 2024:

	RSUs					PSUs
	Units			Weighted Average Grant Date Fair Value Per Unit		Units			Weighted Average Grant Date Fair Value Per Unit
Unvested restricted stock units outstanding at December 31, 2023		9.2		$	300.74		37.2		$	308.05
Granted		43.4		$	190.41		41.2		$	189.95
Vested		(2.9	)	$	297.55		(4.4	)	$	288.77
Forfeited		—		$	—		—		$	—
Unvested restricted stock units outstanding at March 31, 2024(1)		49.7		$	204.52		74.0		$	243.38

(1)A maximum of 123,078 shares could be delivered upon settlement of PSUs based upon the Company’s achievement of the applicable performance goals over the applicable performance periods.

Summary of Unrecognized Compensation Cost and Related Weighted Average Recognition Period Associated with Unvested restricted Stock Awards and Unvested Restricted Stock Units

The following table presents the unrecognized compensation cost and the related weighted average recognition period associated with unvested restricted stock awards and unvested restricted stock unit awards (including RSUs and PSUs) as of March 31, 2024.

	Restricted Stock		Restricted Stock
	Awards		Units
Unrecognized compensation cost	$	270,863	$	10,581
Weighted average period for recognition (years)		2.8		1.5