Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 39,839	$ 23,747	$ 23,552
Other comprehensive income before tax
Change in fair value of derivatives	0	0	0
Reclassification to earnings			126
Other comprehensive income before tax			126
Income tax expense related to components of other comprehensive income			50
Reversal of income tax allocation			(1,595)
Net current-period other comprehensive income			1,671
Comprehensive income	$ 39,839	$ 23,747	$ 25,223