Employee Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

Stock-based compensation for the years ended December 31, 2020, 2019, and 2018 includes expense related to awards of stock options, performance and service based restricted stock units and purchases under the 2010 Employee Stock Purchase Plan. Total stock-based compensation expense and the related income tax benefit were as follows:

	Year Ended December 31,
	2020		2019		2018
	(In thousands)
Total stock-based compensation expense	$	53,694	$	29,583	$	50,093
Related income tax benefit	6,573		5,143		3,783

Schedule of Stock Options and Restricted Stock Units Granted

The following table summarizes restricted stock units with only service conditions granted under our 2010 Equity Incentive Plan:

	Year Ended December 31,
	2020		2019		2018
	(In thousands, except per share data)
Restricted stock units granted	1,618		238		452
Weighted-average grant-date fair value	$	31.12	$	38.93	$	74.33

The following table summarizes the performance-based restricted stock units granted under our 2010 Equity Incentive Plan:

	Year Ended December 31,
	2020		2019		2018
	(In thousands, except per share data)
Performance restricted stock units granted	1,045		722		276
Weighted-average grant-date fair value	$	33.15	$	48.45	$	71.70

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

Restricted stock unit activity for the year ended December 31, 2020 was as follows:

	Shares	Weighted-Average Grant-Date Fair Value
	(In thousands, except per share data)
Outstanding at December 31, 2019	888	$	47.20
Restricted stock units granted	1,618	31.12
Restricted stock units vested	(616)	34.51
Restricted stock units canceled	(668)	38.57
Outstanding at December 31, 2020	1,222	$	36.24

Performance-based restricted stock unit activity for the year ended December 31, 2020 was as follows:

	Shares	Weighted-Average Grant-Date Fair Value
	(In thousands, except per share data)
Outstanding at December 31, 2019	854	$	54.63
Performance restricted stock units granted (at target)	1,045	$	33.15
Performance restricted stock units vested	(258)	$	50.33
Performance restricted stock units canceled	(695)	$	48.72
Outstanding at December 31, 2020	946	$	35.62

Schedule of Weighted-Average Assumptions Used to Estimate Stock Option Fair Value

The following table summarizes our market-based stock options granted:

	Year Ended December 31,
	2020
	(In thousands, except per share data)
Stock options granted	2,250
Weighted-average exercise price	$	31.30
Weighted-average grant-date fair value	$	14.57

	Year Ended December 31,
	2020
Risk-free interest rate	0.63	%
Expected term (in years)	3.30
Expected dividends	—
Expected volatility	53.8	%

Schedule of Stock Option Activity

Total stock option activity for the year ended December 31, 2020 was as follows:

	Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (in Years)	Aggregate Intrinsic Value
	(In thousands, except per share data and years)
Outstanding at December 31, 2019	181	$	20.09
Options granted	2,250	31.30
Options exercised	(404)	26.13
Options canceled	(393)	28.37
Outstanding at December 31, 2020	1,634	$	32.04	5.99	$	38,836
Exercisable at December 31, 2020	134	22.95		2.06	$	4,411