Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2018	Mar. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 9,759	$ 8,373
Other comprehensive income, net of tax:
Minimum pension liability adjustment, net of tax of $6 and $9, respectively	22	14
Recognition of unrealized loss on hedge transactions, net of tax of $(1,085) and $(397), respectively	(3,113)	(623)
Other comprehensive loss	(3,091)	(609)
Total comprehensive income	$ 6,668	$ 7,764