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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Treasury Stock [Member]
Noncontrolling Interest [Member]
Total
Beginning Balance at Dec. 31, 2019 $ 31 $ 70,664 $ 474,637 $ (39,853) $ (37,475) $ 140,994 $ 608,998
Foreign currency translation adjustment, net of tax       15,347   6,423  
Transfer from other comprehensive income into earnings       (52)      
Net derivative instrument loss, net of tax       0   (19) 19
Net income     23,480   8,688 32,168
Dividends, Cash     (10,406)     324  
Shares issued for license acquisition   0          
Shares issued upon exercise of stock options 1 796          
Transfer of subsidiary shares purchased   525       (139)  
Dividends     10,406     (324)  
Share-based compensation (adjustment)   1,283 482     178  
Ending Balance at Sep. 30, 2020 32 73,268 488,193 (24,558) (37,475) 155,801 655,261
Beginning Balance at Dec. 31, 2020 32 75,708 503,567 (5,997) (37,475) 166,615 702,450
Foreign currency translation adjustment, net of tax       (22,814)   (10,389)  
Transfer from other comprehensive income into earnings       0      
Net derivative instrument loss, net of tax       (511)   (192) 703
Net income     88,635   26,854 115,489
Dividends, Cash     (23,740)     9,836  
Shares issued for license acquisition   5,000          
Shares issued upon exercise of stock options 0 1,727          
Transfer of subsidiary shares purchased   (540)       1,153  
Dividends     23,740     (9,836)  
Share-based compensation (adjustment)   1,175 892     (69)  
Ending Balance at Sep. 30, 2021 $ 32 $ 83,070 $ 569,354 $ (29,322) $ (37,475) $ 174,136 $ 759,795