Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Stock-based Compensation

Summary of the stock-based compensation activity

	Quarter ended June 30,				Six months ended June 30,
	2022		2021		2022		2021
	(in thousands)
Grants:
Units:
Performance-based restricted share units ("RSUs")		—		—		342		310
Stock options		—		—		574		249
Time-based RSUs		—		—		331		171
Grant date fair value:
Performance-based RSUs	$	—	$	—	$	19,522	$	18,237
Stock options		—		—		12,138		5,116
Time-based RSUs		—		—		18,903		10,066
Total	$	—	$	—	$	50,563	$	33,419
Vestings and exercises:
Performance-based RSUs vested		—		—		643		640
Stock options exercised		19		97		63		185
Time-based RSUs vested		2		2		246		307
Compensation expense	$	14,948	$	8,894	$	24,223	$	19,771