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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
Net income $ 42,151 $ 33,484 $ 11,147
Other comprehensive income (loss) - Currency translation adjustment (3,292) (4,468) 1,906
Comprehensive income $ 38,859 $ 29,016 $ 13,053