Subsequent Events - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended					1 Months Ended
	Mar. 25, 2012	Dec. 30, 2012		Jan. 01, 2012	Jan. 02, 2011	Jan. 02, 2011 Employee and Officer	Feb. 27, 2013 Subsequent Event	Feb. 13, 2013 Subsequent Event	Feb. 27, 2013 Subsequent Event Employee and Officer	Feb. 13, 2013 Subsequent Event Employee and Officer	Feb. 13, 2013 Subsequent Event Performance Based Restricted Shares	Feb. 27, 2013 Subsequent Event Performance Based Restricted Shares Minimum	Feb. 27, 2013 Subsequent Event Performance Based Restricted Shares Maximum	Feb. 27, 2013 Subsequent Event Performance Based Restricted Shares Director	Feb. 27, 2013 Subsequent Event Employee Stock Option Minimum	Feb. 27, 2013 Subsequent Event Employee Stock Option Maximum
Subsequent Event [Line Items]
Common stock options, granted		215,670		392,000	675,500		348,010	91,140
Restricted stock granted		304,590	[1]			25,000			8,040	16,500	31,430			163,480
Quarterly declared dividend per share	$ 3.00	$ 3.00					$ 0.20
Dividend declaration date							Feb. 27, 2013
Dividend payable date							Mar. 29, 2013
Vesting period of grant (in years)												3 years	4 years		3 years	4 years
General and administrative expense							$ 5

[1] The weighted average grant date fair value for performance-based restricted shares granted was calculated based on the market price on the grant dates. Certain tranches will ultimately be valued when the performance condition is established for each tranche, which generally occurs in the fourth quarter of each fiscal year.