Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Costs Associated with Share-Based Compensation Plans

The following table presents costs associated with the Company’s share-based compensation plans:

	Three Months Ended March 31,
(in thousands)	2021		2020
Expense:
RSUs	$	29,229	$	24,658
Employee stock purchase plan		1,974		1,245
	$	31,203	$	25,903

Summary of RSU Activity

The following table summarizes RSU activity for the three months ended March 31, 2021:

(in thousands, except weighted-average grant-date fair value)	Shares		Weighted-average grant-date fair value
Unvested at December 31, 2020	905		$	57.24
Granted during 2021	816		$	56.29
Vested during 2021	(761	)	$	55.91
Forfeited during 2021	(19	)	$	57.23
Unvested at March 31, 2021	941		$	57.49