Parent Company Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares	Dec. 29, 2019	Dec. 30, 2018
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	38,934,009	40,977,561
Common stock, shares outstanding	38,934,009	40,977,561
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	38,934,009	40,977,561
Common stock, shares outstanding	38,934,009	40,977,561
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0