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Share-Based Payments (Tables)
6 Months Ended
Jun. 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 Six Months Ended
 June 30,
2021
June 30,
2020
June 30,
2021
June 30,
2020
 (In thousands)
Stock option compensation expense$2,662 $2,376 $5,444 $5,507 
RSU compensation expense7,673 6,588 14,031 13,950 
Performance award compensation expense4,833 174 10,805 3,957 
$15,168 $9,138 $30,280 $23,414