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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Common stock [Member]
Additional paid-in capital [Member]
Retained earnings [Member]
Accumulated other comprehensive income (loss) [Member]
Treasury stock [Member]
Noncontrolling interest [Member]
Balance at Dec. 31, 2013     $ 57,877 $ 359,459 $ 25,860 $ (36,016) $ 128,145
Shares issued upon exercise of stock options     1,981     219  
Sale of subsidiary shares to noncontrolling interest     (335)       1,365
Purchase of subsidiary shares from noncontrolling interests     0       0
Net income $ 37,345     29,436     7,909
Dividends       (14,855)     (4,667)
Stock-based compensation     677 81     30
Translation adjustments, net of tax (57,806)       (41,683)   (16,123)
Net derivative instrument gain, net of tax         0   0
Shares received as proceeds of option exercises           (667)  
Balance at Dec. 31, 2014 498,724 $ 31 60,200 374,121 (15,823) (36,464) 116,659
Shares issued upon exercise of stock options     1,234     140  
Sale of subsidiary shares to noncontrolling interest     (192)       1,523
Purchase of subsidiary shares from noncontrolling interests     0       0
Net income 38,969     30,437     8,532
Dividends       (16,124)     (3,836)
Stock-based compensation     788 0     0
Translation adjustments, net of tax (44,346)       (32,268)   (12,078)
Net derivative instrument gain, net of tax         0   0
Shares received as proceeds of option exercises           (493)  
Balance at Dec. 31, 2015 476,387 31 62,030 388,434 (48,091) (36,817) 110,800
Shares issued upon exercise of stock options     2,160     142  
Sale of subsidiary shares to noncontrolling interest     (173)       1,738
Purchase of subsidiary shares from noncontrolling interests     (1,753)       (1,188)
Net income 43,248     33,331     9,917
Dividends       (19,273)     (4,863)
Stock-based compensation     839 222     147
Translation adjustments, net of tax (13,153)       (9,874)   (3,279)
Net derivative instrument gain, net of tax         (17)   (5)
Shares received as proceeds of option exercises           (800)  
Balance at Dec. 31, 2016 $ 483,658 $ 31 $ 63,103 $ 402,714 $ (57,982) $ (37,475) $ 113,267