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CONSOLIDATED STATEMENTS OF CHANGES IN 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, 2014     $ 60,200 $ 374,121 $ (15,823)   $ 116,659
Net income $ 18,825     14,358     4,467
Foreign currency translation adjustment, net of tax (32,589)       (23,636)   (8,953)
Shares issued upon exercise of stock options     429        
Stock-based compensation     392        
Sale of subsidiary shares to noncontrolling interest     (6)       654
Dividends       (8,058)     (3,836)
Balance at Jun. 30, 2015 474,535 $ 31 61,015 380,421 (39,459) $ (36,464) 108,991
Balance at Dec. 31, 2015 476,387   62,030 388,434 (48,091)   110,800
Net income 17,177     13,165     4,012
Foreign currency translation adjustment, net of tax 8,113       5,670   2,443
Shares issued upon exercise of stock options     402        
Stock-based compensation     421        
Sale of subsidiary shares to noncontrolling interest     (35)       463
Dividends       (9,315)     (4,863)
Balance at Jun. 30, 2016 $ 488,750 $ 31 $ 62,818 $ 392,284 $ (42,421) $ (36,817) $ 112,855