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Consolidated Statements Of Comprehensive Income - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Net income $ 60,251 $ 44,467 $ 27,376
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX EFFECT OF NIL      
Change in net foreign currency translation adjustments (1,868) (1,202) 633
Change in deferred pension gain (loss) (4) (388) (203)
OTHER COMPREHENSIVE INCOME (LOSS) (1,872) (1,590) 430
TOTAL COMPREHENSIVE INCOME $ 58,379 $ 42,877 $ 27,806