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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common stock
Additional paid-in capital
Retained earnings
Treasury stock, at cost
Non-controlling interests
Balance (in shares) at Dec. 31, 2018   25,413        
Balance at Dec. 31, 2018 $ 296,668 $ 25,413 $ 122,667 $ 590,655 $ (443,304) $ 1,237
Increase (Decrease) in Equity            
Net income (loss) (2,744)     (3,184)   440
Distributions to non-controlling interest holders (620)         (620)
Share-based compensation expense 2,621   2,621      
Exercise of stock options and issuance of restricted share units and restricted shares 28     (1,549) 1,577  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (585)     (1,163) 578  
Balance (in shares) at Mar. 31, 2019   25,413        
Balance at Mar. 31, 2019 295,368 $ 25,413 125,288 584,759 (441,149) 1,057
Balance (in shares) at Dec. 31, 2018   25,413        
Balance at Dec. 31, 2018 296,668 $ 25,413 122,667 590,655 (443,304) 1,237
Increase (Decrease) in Equity            
Net income (loss) 228          
Balance (in shares) at Sep. 30, 2019   25,413        
Balance at Sep. 30, 2019 288,656 $ 25,413 130,951 579,557 (448,590) 1,325
Balance (in shares) at Mar. 31, 2019   25,413        
Balance at Mar. 31, 2019 295,368 $ 25,413 125,288 584,759 (441,149) 1,057
Increase (Decrease) in Equity            
Net income (loss) (4,604)     (5,844)   1,240
Distributions to non-controlling interest holders (518)         (518)
Share-based compensation expense 2,832   2,832      
Exercise of stock options and issuance of restricted share units and restricted shares 207     (3,473) 3,680  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (713)     (1,402) 689  
Repurchase of shares (6,700)       (6,700)  
Balance (in shares) at Jun. 30, 2019   25,413        
Balance at Jun. 30, 2019 285,872 $ 25,413 128,120 574,040 (443,480) 1,779
Increase (Decrease) in Equity            
Net income (loss) 7,576     7,165   411
Distributions to non-controlling interest holders (865)         (865)
Share-based compensation expense 2,831   2,831      
Exercise of stock options and issuance of restricted share units and restricted shares 157     (1,214) 1,371  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (218)     (434) 216  
Repurchase of shares (6,697)       (6,697)  
Balance (in shares) at Sep. 30, 2019   25,413        
Balance at Sep. 30, 2019 288,656 $ 25,413 130,951 579,557 (448,590) 1,325
Balance (in shares) at Dec. 31, 2019   25,413        
Balance at Dec. 31, 2019 (21,357) $ 25,413 133,669 272,026 (453,934) 1,469
Increase (Decrease) in Equity            
Net income (loss) (11,545)     (11,650)   105
Distributions to non-controlling interest holders (311)         (311)
Share-based compensation expense 2,894   2,894      
Exercise of stock options and issuance of restricted share units and restricted shares 0     (4,796) 4,796  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (1,205)     (3,114) 1,909  
Balance (in shares) at Mar. 31, 2020   25,413        
Balance at Mar. 31, 2020 (31,524) $ 25,413 136,563 252,466 (447,229) 1,263
Balance (in shares) at Dec. 31, 2019   25,413        
Balance at Dec. 31, 2019 (21,357) $ 25,413 133,669 272,026 (453,934) 1,469
Increase (Decrease) in Equity            
Net income (loss) (59,306)          
Balance (in shares) at Sep. 30, 2020   25,413        
Balance at Sep. 30, 2020 (76,578) $ 25,413 140,225 198,756 (442,107) 1,135
Balance (in shares) at Mar. 31, 2020   25,413        
Balance at Mar. 31, 2020 (31,524) $ 25,413 136,563 252,466 (447,229) 1,263
Increase (Decrease) in Equity            
Net income (loss) (34,864)     (35,061)   197
Distributions to non-controlling interest holders (180)         (180)
Share-based compensation expense 1,930   1,930      
Exercise of stock options and issuance of restricted share units and restricted shares 0     (3,177) 3,177  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (212)     (1,205) 993  
Balance (in shares) at Jun. 30, 2020   25,413        
Balance at Jun. 30, 2020 (64,850) $ 25,413 138,493 213,023 (443,059) 1,280
Increase (Decrease) in Equity            
Net income (loss) (12,897)     (13,237)   340
Distributions to non-controlling interest holders (485)         (485)
Share-based compensation expense 1,732   1,732      
Exercise of stock options and issuance of restricted share units and restricted shares 0     (747) 747  
Treasury shares withheld for the payment of tax on restricted share unit and restricted share issuances (78)     (283) 205  
Balance (in shares) at Sep. 30, 2020   25,413        
Balance at Sep. 30, 2020 $ (76,578) $ 25,413 $ 140,225 $ 198,756 $ (442,107) $ 1,135