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Consolidated Statements of Changes in Equity Statement - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Treasury Stock
Retained Earnings
Accumulated Other Comprehensive Loss
Noncontrolling Interest
Balance at Dec. 31, 2019 $ 1,579,342 $ 1,256 $ 1,190,058 $ (463,704) $ 1,016,554 $ (164,890) $ 68
Balance, shares at Dec. 31, 2019   54,220,854          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 1,720       1,921   (201)
Other comprehensive loss (59,818)         (59,777) (41)
Stock issued under employee stock plans 1,453 $ 1 1,701 (249)      
Stock issued under employee stock plans, shares   80,519          
Share-based compensation 6,338   6,338        
Repurchase of shares (239,763)     (239,763)      
Repurchase of shares, shares   (2,095,683)          
Balance at Mar. 31, 2020 1,289,272 $ 1,257 1,198,097 (703,716) 1,018,475 (224,667) (174)
Balance, shares at Mar. 31, 2020   52,205,690          
Balance at Dec. 31, 2019 1,579,342 $ 1,256 1,190,058 (463,704) 1,016,554 (164,890) 68
Balance, shares at Dec. 31, 2019   54,220,854          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) (73,698)            
Balance at Sep. 30, 2020 1,305,758 $ 1,259 1,210,709 (703,604) 942,920 (145,583) 57
Balance, shares at Sep. 30, 2020   52,310,135          
Balance at Mar. 31, 2020 1,289,272 $ 1,257 1,198,097 (703,716) 1,018,475 (224,667) (174)
Balance, shares at Mar. 31, 2020   52,205,690          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) (115,733)       (115,804)   71
Other comprehensive loss 32,172         32,145 27
Stock issued under employee stock plans 3,824 $ 2 3,763 59      
Stock issued under employee stock plans, shares   82,841          
Share-based compensation 3,125   3,125        
Balance at Jun. 30, 2020 1,212,660 $ 1,259 1,204,985 (703,657) 902,671 (192,522) (76)
Balance, shares at Jun. 30, 2020   52,288,531          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 40,315       40,249   66
Other comprehensive loss 47,006         46,939 67
Stock issued under employee stock plans 740   687 53      
Stock issued under employee stock plans, shares   21,604          
Share-based compensation 5,037   5,037        
Balance at Sep. 30, 2020 1,305,758 $ 1,259 1,210,709 (703,604) 942,920 (145,583) 57
Balance, shares at Sep. 30, 2020   52,310,135          
Balance at Dec. 31, 2020 1,445,903 $ 1,267 1,228,446 (703,032) 1,013,155 (94,214) 281
Balance, shares at Dec. 31, 2020   52,734,049          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) (8,621)       (8,665)   44
Other comprehensive loss (42,901)         (42,845) (56)
Stock issued under employee stock plans 2,854 $ 1 3,335 (482)      
Stock issued under employee stock plans, shares   62,436          
Share-based compensation 8,492   8,492        
Balance at Mar. 31, 2021 1,405,727 $ 1,268 1,240,273 (703,514) 1,004,490 (137,059) 269
Balance, shares at Mar. 31, 2021   52,796,485          
Balance at Dec. 31, 2020 1,445,903 $ 1,267 1,228,446 (703,032) 1,013,155 (94,214) 281
Balance, shares at Dec. 31, 2020   52,734,049          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 73,725            
Balance at Sep. 30, 2021 1,491,457 $ 1,270 1,260,283 (703,136) 1,087,007 (154,048) 81
Balance, shares at Sep. 30, 2021   52,855,471          
Balance at Mar. 31, 2021 1,405,727 $ 1,268 1,240,273 (703,514) 1,004,490 (137,059) 269
Balance, shares at Mar. 31, 2021   52,796,485          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 8,632       8,635   (3)
Other comprehensive loss 12,686         12,675 11
Stock issued under employee stock plans 1,467 $ 1 1,199 267      
Stock issued under employee stock plans, shares   25,769          
Share-based compensation 10,984   10,984        
Balance at Jun. 30, 2021 1,439,496 $ 1,269 1,252,456 (703,247) 1,013,125 (124,384) 277
Balance, shares at Jun. 30, 2021   52,822,254          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 73,714       73,882   (168)
Other comprehensive loss (29,692)         (29,664) (28)
Stock issued under employee stock plans 1,134 $ 1 1,022 111      
Stock issued under employee stock plans, shares   33,217          
Share-based compensation 6,805   6,805        
Balance at Sep. 30, 2021 $ 1,491,457 $ 1,270 $ 1,260,283 $ (703,136) $ 1,087,007 $ (154,048) $ 81
Balance, shares at Sep. 30, 2021   52,855,471