Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Stock Option Activity

A summary of PSP activity for the years ended December 31, 2021, 2020 and 2019 is as follows:

	Weighted- average grant date fair value		Granted shares			Awarded shares			Shares not yet awarded
Outstanding at January 1, 2019	$	5.03		1,196,092			1,196,092			—
Granted	$	—		—			—			—
Awarded	$	—		—			—			—
Vested	$	5.29		(115,040	)		(115,040	)		—
Forfeited	$	4.74		(29,760	)		(29,760	)		—
Outstanding at December 31, 2019	$	5.00		1,051,292			1,051,292			—
Granted	$	—		—			—			—
Awarded	$	—		—			—			—
Vested	$	6.06		(119,072	)		(119,072	)		—
Forfeited	$	5.03		(22,392	)		(22,392	)		—
Outstanding at December 31, 2020	$	4.86		909,828			909,828			—
Granted	$	—		—			—			—
Awarded	$	—		—			—			—
Vested	$	4.73		(45,736	)		(45,736	)		—
Forfeited	$	5.50		(24,250	)		(24,250	)		—
Outstanding at December 31, 2021	$	4.87		839,842			839,842			—

A summary of 2010 SIP and 2019 SIP activity for the years ended December 31, 2021, 2020 and 2019 is as follows:

	Weighted- average grant date fair value		Granted shares			Awarded shares			Shares not yet awarded
Outstanding at January 1, 2019	$	16.69		11,102,375			6,595,319			4,507,056
Granted	$	28.53		1,812,047			797,778			1,014,269		(1)
Awarded	$	17.26		299,339			1,954,983			(1,655,644	)
Vested	$	14.29		(1,068,211	)		(1,068,211	)		—
Forfeited	$	19.09		(503,632	)		(209,293	)		(294,339	)
Outstanding at December 31, 2019	$	18.10		11,641,918			8,070,576			3,571,342
Granted	$	46.58		970,997			148,015			822,982		(2)
Awarded	$	19.71		497,082			1,880,512			(1,383,430	)
Vested	$	15.97		(3,059,619	)		(3,059,619	)		—
Forfeited	$	20.75		(356,041	)		(119,637	)		(236,404	)
Outstanding at December 31, 2020	$	19.89		9,694,337			6,919,847			2,774,490
Granted	$	46.05		1,143,094			204,826			938,268		(3)
Awarded	$	25.80		310,147			1,272,554			(962,407	)
Vested	$	15.73		(3,223,964	)		(3,223,964	)		—
Forfeited	$	30.54		(315,168	)		(147,702	)		(167,466	)
Outstanding at December 31, 2021	$	21.59		7,608,446			5,025,561			2,582,885

(1)Of the 1,014,269 performance-based shares granted in 2019, the payout for 501,384 shares may be increased up to 200% of the target or decreased to zero, subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.

(2)Of the 822,982 performance-based shares granted in 2020, the payout for 365,606 shares may be increased up to 200% of the target or decreased to zero, 20,611 shares may be increased up to 120% of the target or decreased to zero, 15,850 shares may be increased up to 150% of the target or decreased to zero and 56,226 shares may be increased up to 150% or decreased to 50% of target subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.

(3)Of the 938,268 performance-based shares granted in 2021, the payout for 486,679 shares may be increased up to 200% of the target or decreased to zero, 21,651 shares may be increased up to 120% of the target or decreased to zero and 3,886 shares may be increased up to 150% or decreased to 50% of target subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.

Summary of Non-Cash Stock-Based Compensation Expense

The non-cash stock-based compensation expense for the years ended December 31 is as follows:

(in thousands)	2021		2020		2019
Stock incentive plan	$	50,664	$	50,198	$	39,626
Employee stock purchase plan		9,953		8,789		6,504
Performance stock plan		401		762		864
Total	$	61,018	$	59,749	$	46,994

2010 Stock Incentive Plan

Schedule of Performance Stock Plan and 2010 Stock Incentive Plan

The following table sets forth information as of December 31, 2021, 2020 and 2019, with respect to the number of time-based restricted shares granted and awarded, the number of performance-based restricted shares granted, and the number of performance-based restricted shares awarded under our Performance Stock Plan and 2010 and 2019 Stock Incentive Plans:

Year	Time-based restricted stock granted and awarded		Performance-based restricted stock granted			Performance-based restricted stock awarded
2021		204,826		938,268	(1)		1,272,554
2020		148,015		822,982	(2)		1,880,512
2019		797,778		1,014,269	(3)		1,954,983

(1)Of the 938,268 performance-based shares granted in 2021, the payout for 486,679 shares may be increased up to 200% of the target or decreased to zero, 21,651 shares may be increased up to 120% of the target or decreased to zero and 3,886 shares may be increased up to 150% or decreased to 50% of target subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.

(2)Of the 822,982 performance-based shares granted in 2020, the payout for 365,606 shares may be increased up to 200% of the target or decreased to zero, 20,611 shares may be increased up to 120% of the target or decreased to zero, 15,850 shares may be increased up to 150% of the target or decreased to zero and 56,226 shares may be increased up to 150% or decreased to 50% of target subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.

(3)Of the 1,014,269 performance-based shares granted in 2019, the payout for 501,384 shares may be increased up to 200% of the target or decreased to zero, subject to the level of performance attained. The amount reflected in the table includes all time-based share grants at a target payout of 100%.