Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Apr. 01, 2016
Mar. 27, 2015
Statement of Comprehensive Income [Abstract]    
Net income $ 6,589 $ 4,965
Changes in derivative instrument:    
Net change in fair value of interest rate swap (372) 0
Net loss reclassified to interest expense 4 0
Tax benefit 131 0
Net change in derivative instrument (237) 0
Foreign currency translation adjustments 516 (1,254)
Other comprehensive income (loss), net of tax 279 (1,254)
Total comprehensive income $ 6,868 $ 3,711