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Share-Based Payments (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Option and Restricted Stock Unit Compensation Expense
Compensation expense, included within other selling and administrative expenses in the consolidated statements of operations, related to stock options, RSUs, and performance awards is as follows:
 For the Three Months EndedFor the Nine Months Ended
 September 30,
2021
September 30,
2020
September 30,
2021
September 30,
2020
 (In thousands)
Stock option compensation expense$2,407 $3,095 $7,851 $8,602 
RSU compensation expense6,633 7,973 20,664 21,923 
Performance award compensation expense7,172 5,464 17,978 9,421 
$16,212 $16,532 $46,493 $39,946