Fair Value Measurements - Net Change in Credit Valuation Adjustment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011
Fair Value Disclosures [Line Items]
Total change in credit valuation	$ (1,967)	$ 4,756	$ (9,886)	$ 10,757
Other Income [Member]
Fair Value Disclosures [Line Items]
Total change in credit valuation	(1,739)	2,561	(8,020)	8,562
Accumulated Other Comprehensive Income (Loss) [Member]
Fair Value Disclosures [Line Items]
Total change in credit valuation	$ (228)	$ 2,195	$ (1,866)	$ 2,195