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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - 6 months ended Jun. 30, 2015 - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional paid-in capital [Member]
Retained earnings [Member]
Treasury stock [Member]
Treasury stock reserved for deferred compensation [Member]
Accumulated other comprehensive income (loss) [Member]
Parent [Member]
Noncontrolling interest [Member]
Balance, Beginning at Dec. 31, 2014 $ 590,058   $ 562,367 $ 126,007 $ (13,897) $ (1,075) $ (112,630) $ 560,772 $ 29,286
Balance, Beginning (in shares) at Dec. 31, 2014   53,749,028              
Net income (loss) 3,220     7,003       7,003 (3,783)
Currency translation adjustment (40,950)           (39,816) (39,816) (1,134)
Pension liability adjustments, net of tax 1,497           1,497 1,497  
Dividends on common stock (538)     (538)       (538)  
Exercise of stock options 144   32   112     144  
Exercise of stock options (in shares)   12,500              
Dissolution of subsidiary (42)           26 26 (68)
Stock-based compensation 1,339   1,339         1,339  
Tax benefit related to stock-based compensation (538)   (538)         (538)  
Issuance of treasury stock under 401(k) plan 304   27   277     304  
Issuance of treasury stock under 401(k) plan (in shares)   30,814              
Balance, Ending at Jun. 30, 2015 $ 554,494   $ 563,227 $ 132,472 $ (13,508) $ (1,075) $ (150,923) $ 530,193 $ 24,301
Balance, Ending (in shares) at Jun. 30, 2015 53,792,342 53,792,342.000