Income Taxes - Rate Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Effective Income Tax Rate Reconciliation, Amount:
Tax at federal statutory rate									$ 10,448	$ 33,180	$ 90,494
State and local taxes, net									4,620	8,312	11,507
Effect of enacted changes in tax laws									1,393	0	0
Reduction in uncertain tax positions									(21,147)	(1,803)	(6,721)
Gain on Company-owned life insurance									(1,250)	(3,673)	(2,690)
Nondeductible expense, net									1,847	2,039	866
Other, net									548	(163)	1,161
Income tax (benefit)/expense	$ 8,685	$ (10,247)	$ (5,743)	$ 3,764	$ 16,419	$ 2,578	$ 13,813	$ 5,082	$ (3,541)	$ 37,892	$ 94,617
Effective Income Tax Rate Reconciliation, Percent:
Tax at federal statutory rate (% of pre-tax)									35.00%	35.00%	35.00%
State and local taxes, net (% of pre-tax)									15.50%	8.80%	4.40%
Effect of enacted changes in tax laws (% of pre-tax)									4.70%	0.00%	0.00%
Reduction in uncertain tax positions (% of pre-tax)									(70.80%)	(1.90%)	(2.60%)
Gain on Company-owned life insurance (% of pretax)									(4.20%)	(3.90%)	(1.00%)
Non deductible expense, net (% of pre-tax)									6.20%	2.20%	0.30%
Other, net (% of pre-tax)									1.80%	(0.20%)	0.50%
Effective income tax rate									(11.80%)	40.00%	36.60%