Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 26,819	$ 8,955	$ (16,898)
Other comprehensive (loss) income before tax
Change in fair value of derivatives	(1,391)	(24)	(220)
Reclassification to earnings	145	408	(335)
Other comprehensive (loss) income before tax	(1,246)	384	(555)
Income tax expense related to components of other comprehensive income	437
Other comprehensive (loss) income, net of tax	(809)	384	(555)
Comprehensive income (loss)	$ 26,010	$ 9,339	$ (17,453)