Parent Company Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares	Jan. 03, 2016	Dec. 28, 2014
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	49,838,221	55,553,149
Common stock, shares outstanding	49,838,221	55,553,149
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Parent Company [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	49,838,221	55,553,149
Common stock, shares outstanding	49,838,221	55,553,149
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0