Condensed Consolidated Statements of Comprehensive Income Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2015	Jun. 25, 2014	Jul. 01, 2015	Jun. 25, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 9,734	$ 8,273	$ 18,267	$ 14,704
Other comprehensive income (loss), net of tax:
Minimum pension liability adjustment, net of tax expense of $169, $91, $338 and $181	264	140	528	281
Recognition of unrealized gain (loss) on hedge transaction, net of tax expense (benefit) of $2,124, $(339), $963 and $(563)	3,319	(528)	1,505	(877)
Other comprehensive income (loss)	3,583	(388)	2,033	(596)
Total comprehensive income	$ 13,317	$ 7,885	$ 20,300	$ 14,108