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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Sep. 28, 2018
Sep. 29, 2017
Statement Of Income And Comprehensive Income [Abstract]        
Net income $ 5,157 $ 5,289 $ 24,045 $ 17,913
Foreign currency translation adjustment (432) 829 (1,626) 2,297
Total comprehensive income $ 4,725 $ 6,118 $ 22,419 $ 20,210