Parent Company Condensed Balance Sheets (Parenthetical) (Detail) (USD $)	Dec. 30, 2012	Jan. 01, 2012
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	56,313,249	57,741,208
Common stock, shares outstanding	56,313,249	57,741,208
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Parent Company
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	56,313,249	57,741,208
Common stock, shares outstanding	56,313,249	57,741,208
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued