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Employee Stock Plans (Tables)
 9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Awards
Compensation expense for stock-based awards recognized during the three and nine months ended September 30, 2022 and 2021 was as follows (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Stock options$— $581 $248 $1,114 
Restricted stock units and awards1,188 1,388 4,015 4,214 
Performance share units4,371 936 7,724 3,031 
Total stock-based compensation expense$5,559 $2,905 $11,987 $8,359 
Schedule of Stock Options, Restricted Stock Units and Awards, and Performance Share Units Award Activity The following table presents our stock options and restricted stock units and awards activity during the nine months ended September 30, 2022 (in thousands, except per share data):
Stock OptionsRestricted Stock Units and Awards
Number of
Options
Weighted Average Exercise Price
Per Share
Number of
Shares
Weighted Average
Grant-Date
Fair Value (1)
Outstanding at beginning of year1,223 $17.71 389 $25.07 
Granted— $— 130 $38.53 
Exercised or released(541)$14.78 (238)$23.47 
Expired or canceled— $— (4)$34.04 
Outstanding at September 30, 2022682 $20.04 277 $32.62 
Exercisable at September 30, 2022682 $20.04 

(1)Represents weighted average market value of the shares; awards are granted at no cost to the recipients.
The following table presents our PSU award activity during the nine months ended September 30, 2022 (in thousands, except per share data):
Performance
Share Units
Weighted
Average
Grant-Date
Fair Value
Per Unit (1)
Outstanding at beginning of year473 $23.64 
Granted103 $38.15 
Vested(211)$19.82 
Adjustments for performance results (2)
82 $25.75 
Canceled(5)$33.21 
Outstanding at September 30, 2022442 $29.12 
(1)Represents weighted average market value of the performance share units; PSUs are granted at no cost to the recipients.
(2)Represents the change in the number of performance awards earned based on performance achievement for the performance period.