Condensed Consolidated Statements of Comprehensive Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 24, 2014	Sep. 25, 2013	Sep. 24, 2014	Sep. 25, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 8,343	$ 7,031	$ 23,047	$ 20,310
Other comprehensive income (loss), net of tax:
Minimum pension liability adjustment, net of tax expense of $90, $162, $271 and $487	141	251	422	752
Recognition of unrealized gain (loss) on hedge transaction, net of tax expense (benefit) of $103, $(459), $(460) and $1,063	159	(708)	(718)	1,640
Other comprehensive income (loss)	300	(457)	(296)	2,392
Total comprehensive income	$ 8,643	$ 6,574	$ 22,751	$ 22,702