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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       (661)   (173)  
Transfer from other comprehensive income into earnings       (52)      
Net derivative instrument gain (loss), net of tax       0   (19) (19)
Net income     6,941   0 3,375 10,316
Dividends     (10,406)     (324)  
Shares issued upon exercise of stock options 1 656          
Share-based compensation   855 290     128  
Transfer of subsidiary shares purchased   360       (139)  
Ending Balance at Jun. 30, 2020 32 72,535 471,462 (40,566) (37,475) 143,842 609,830
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       (11,392)   (6,415)  
Transfer from other comprehensive income into earnings       0      
Net derivative instrument gain (loss), net of tax       (68)   (26) (26)
Net income     50,319   0 15,343 65,662
Dividends     (15,826)     (9,484)  
Shares issued upon exercise of stock options 0 1,583          
Share-based compensation   783 630     (46)  
Transfer of subsidiary shares purchased   (545)       225  
Ending Balance at Jun. 30, 2021 $ 32 $ 77,529 $ 538,690 $ (17,457) $ (37,475) $ 166,212 $ 727,531