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Share-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Summary of share-based compensation expense Share-based compensation expense was as follows:
For the three months ended September 30, For the nine months ended September 30,
2021202020212020
Continuing operations
Stock options, net of estimated forfeitures$72 $297 $349 $1,024 
Restricted stock awards1,954 2,330 5,628 6,875 
Total continuing operations$2,026 $2,627 $5,977 $7,899 
Discontinued operations
Share-based compensation expense for discontinued operations371 1,045 1,198 2,378 
Total continuing and discontinued operations$2,397 $3,672 $7,175 $10,277