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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)
In Thousands, except Share data
Total
USD ($)
Common Stock [Member]
Additional paid-in capital [Member]
USD ($)
Retained earnings [Member]
USD ($)
Treasury stock [Member]
USD ($)
Treasury stock reserved for deferred compensation [Member]
USD ($)
Accumulated other comprehensive income (loss) [Member]
USD ($)
Parent [Member]
USD ($)
Noncontrolling interest [Member]
USD ($)
Balance, Beginning at Dec. 31, 2012 $ 632,362   $ 507,199 $ 173,407 $ (16,445) $ (1,075) $ (56,469) $ 606,617 $ 25,745
Balance, Beginning (in shares) at Dec. 31, 2012   48,562,204              
Net income 49,897     50,785       50,785 (888)
Currency translation adjustment (24,513)           (22,158) (22,158) (2,355)
Pension liability adjustments, net of tax 2,990           2,990 2,990  
Unrealized loss on investments, net of tax (3)           (3) (3)  
Dividends on common stock (803)     (803)       (803)  
Note conversion 45,903   45,903         45,903  
Note conversion (in shares)   4,903,044              
Exercise of stock options 863   414   449     863  
Exercise of stock options (in shares)   49,967              
Acquisitions 168             0 168
Stock-based compensation 3,727   3,727         3,727  
Tax benefit related to stock-based compensation (46)   (46)         (46)  
Issuance of treasury stock under 401(k) plan 497   270   227     497  
Issuance of treasury stock under 401(k) plan (in shares)   25,320              
Balance, Ending at Sep. 30, 2013 $ 711,042   $ 557,467 $ 223,389 $ (15,769) $ (1,075) $ (75,640) $ 688,372 $ 22,670
Balance, Ending (in shares) at Sep. 30, 2013   53,540,535