Condensed Consolidated Balance Sheets (Unaduited) (Parenthetical) - USD ($) $ in Thousands	Jun. 13, 2017	Dec. 27, 2016
Statement of Financial Position [Abstract]
Accumulated depreciation	$ 94,409	$ 88,190
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value per share (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	190,000,000	190,000,000
Common stock, shares issued (in shares)	24,325,979	24,234,909
Common stock, shares outstanding (in shares)	21,602,050	23,272,274
Treasury stock, shares (in shares)	2,723,929	962,635