Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 13, 2013	Jul. 14, 2012	Jul. 13, 2013	Jul. 14, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income applicable to common shares	$ 116,871	$ 99,606	$ 238,661	$ 233,112
Participating securities' share in earnings	(275)	(237)	(558)	(557)
Net income applicable to common shares	$ 116,596	$ 99,369	$ 238,103	$ 232,555
Basic weighted average common shares	72,930	73,150	73,081	73,003
Dilutive impact of share-based awards	413	934	526	1,154
Diluted weighted average common shares	73,343	74,084	73,607	74,157
Net income applicable to common stockholders	$ 1.60	$ 1.36	$ 3.26	$ 3.19
Net income applicable to common stockholders	$ 1.59	$ 1.34	$ 3.23	$ 3.14
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	64	211	60	224