Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Apr. 01, 2016
Statement of Comprehensive Income [Abstract]    
Net income $ 6,668 $ 6,589
Changes in derivative instrument:    
Net change in fair value of interest rate swap 123 (372)
Net gain reclassified to interest expense 1 4
Tax (expense) benefit (44) 131
Net change in derivative instrument 80 (237)
Foreign currency translation adjustments 127 516
Other comprehensive income, net of tax 207 279
Total comprehensive income $ 6,875 $ 6,868