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Consolidated Statements Of Changes In Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Ordinary Shares
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings (accumulated deficit)
Treasury Stock
BEGINNING BALANCE (in shares) at Dec. 31, 2012   130,040        
BEGINNING BALANCE at Dec. 31, 2012 $ 262,266 $ 1,300 $ 173,852 $ 3,665 $ 83,449  
Net income 27,376       27,376  
Other comprehensive income 430     430    
Stock-based compensation expenses 10,262   10,262      
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units, shares   5,154        
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units 346 $ 52 294      
Share repurchase (10,018)         $ (10,018)
Dividends declared (US$0.15 per ordinary share) (19,965)       (19,965)  
Treasury stock retired, shares   (3,564)        
Treasury stock retired   $ (36) (4,392)   (5,590) $ 10,018
Ending Balance (in shares) at Dec. 31, 2013   131,630        
Ending Balance at Dec. 31, 2013 270,697 $ 1,316 180,016 4,095 85,270  
Net income 44,467       44,467  
Other comprehensive income (1,590)     (1,590)    
Stock-based compensation expenses 10,347   10,347      
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units, shares   3,992        
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units 460 $ 40 420      
Dividends declared (US$0.15 per ordinary share) (20,281)       (20,281)  
Ending Balance (in shares) at Dec. 31, 2014   135,622        
Ending Balance at Dec. 31, 2014 304,100 $ 1,356 190,783 2,505 109,456  
Net income 60,251       60,251  
Other comprehensive income (1,872)     (1,872)    
Issuance of ordinary shares for Shannon Systems acquisition 7,640 $ 16 7,624      
Issuance of ordinary shares for Shannon Systems acquisition, Shares   1,560        
Stock-based compensation expenses 10,418   10,418      
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units, shares   2,339        
Issuance of ordinary shares upon exercise of employee stock options and restricted stock units 441 $ 23 418      
Dividends declared (US$0.15 per ordinary share) (36,480)       (36,480)  
Ending Balance (in shares) at Dec. 31, 2015   139,521        
Ending Balance at Dec. 31, 2015 $ 344,498 $ 1,395 $ 209,243 $ 633 $ 133,227