Condensed Consolidated Balance Sheets - Unaudited (Parenthetical) - $ / shares	Jun. 25, 2019	Dec. 25, 2018
Statement of Financial Position [Abstract]
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)	37,571,574	37,444,400
Common stock, shares outstanding (in shares)	33,422,315	33,321,795
Treasury stock, shares (in shares)	4,149,259	4,122,605