Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Equity Compensation Goals

	Eight Separate Adjusted EBITDA (CEO
Eight Separate Revenue Goals (1)	Performance Award) Goals
(in thousands)	(in thousands)
Goal #1, $710,058	Goal #9, $125,000
Goal #2, $860,058	Goal #10, $155,000
Goal #3, $1,010,058	Goal #11, $175,000
Goal #4, $1,210,058	Goal #12, $190,000
Goal #5, $1,410,058	Goal #13, $200,000
Goal #6, $1,610,058	Goal #14, $210,000
Goal #7, $1,810,058	Goal #15, $220,000
Goal #8, $2,010,058	Goal #16, $230,000

(1) In connection with the acquisition of Vievu that was completed during 2018, the revenue goals were adjusted for the acquiree’s Target Revenue, as defined in the CEO Performance Award agreement.

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the years ended December 31 (number of units and aggregate intrinsic value in thousands):

	2020				2019			2018
			Weighted			Weighted			Weighted
	Number		Average		Number	Average		Number	Average
	of		Grant-Date		of	Grant-Date		of	Grant-Date
	Units		Fair Value		Units	Fair Value		Units	Fair Value
Units outstanding, beginning of year		1,249	$	45.47	1,244	$	28.52	1,902	$	23.58
Granted		577		100.76	718		59.09	287		45.99
Released		(598)		40.68	(547)		27.38	(730)		23.50
Forfeited		(121)		52.40	(166)		36.91	(215)		25.17
Units outstanding, end of year		1,107		76.10	1,249		45.47	1,244		28.52
Aggregate intrinsic value at year end	$	135,679

Summary of Performance Stock Unit Activity

The following table summarizes PSU activity, inclusive of XSUs, for the years ended December 31 (number of units and aggregate intrinsic value in thousands):

	2020				2019			2018
			Weighted			Weighted			Weighted
	Number		Average		Number	Average		Number	Average
	of		Grant-Date		of	Grant-Date		of	Grant-Date
	Units		Fair Value		Units	Fair Value		Units	Fair Value
Units outstanding, beginning of year		6,033	$	34.47	411	$	27.82	446	$	23.02
Granted		417		58.11	6,041		34.61	94		46.29
Released		(184)		27.79	(103)		17.14	(42)		27.11
Forfeited		(648)		40.83	(316)		33.99	(87)		23.65
Units outstanding, end of year		5,618		35.71	6,033		34.47	411		27.82
Aggregate intrinsic value at year end	$	688,414

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the years ended December 31 (number of options in thousands):

	2020				2019			2018
			Weighted			Weighted			Weighted
	Number		Average		Number	Average		Number	Average
	of		Exercise		of	Exercise		of	Exercise
	Options		Price		Options	Price		Options	Price
Options outstanding, beginning of year		6,431	$	28.34	6,458	$	28.24	804	$	4.99
Granted		—		—	—		—	6,366		28.58
Exercised		(65)		4.52	(27)		4.27	(664)		5.09
Expired / terminated		—		—	—		—	(48)		4.55
Options outstanding, end of year		6,366		28.58	6,431		28.34	6,458		28.24
Options exercisable, end of year		530		28.58	65		4.52	92		4.45

Summary of Stock Options Outstanding and Exercisable

The following table summarizes information about stock options that were fully vested or expected to vest as of December 31, 2020 (number of options in thousands):

	Options Outstanding				Options Exercisable
				Weighted				Weighted
		Weighted		Average	Weighted			Average
	Number of	Average		Remaining	Number of	Average		Remaining
Range of	Options	Exercise		Contractual	Options	Exercise		Contractual
Exercise Price	Outstanding	Price		Life (Years)	Exercisable	Price		Life (Years)
$28.58	530	$	28.58	7.15	530	$	28.58	7.15

Reported Share-Based Compensation

We account for stock-based compensation using the fair-value method. Reported stock-based compensation expense was classified as follows for the years ended December 31 (in thousands):

	2020		2019		2018
Cost of product and service sales	$	3,464	$	1,565	$	511
Sales, general and administrative expenses		103,860		59,342		12,710
Research and development expenses		26,248		17,588		8,658
Total stock-based compensation expense	$	133,572	$	78,495	$	21,879
Income tax benefit	$	29,329	$	11,457	$	4,049