Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Effective Income Tax Rate Reconciliation, Amount:
Tax at federal statutory rate									$ 33,863	$ 10,448	$ 33,180
State and local taxes, net									5,093	4,620	8,312
Effect of enacted changes in tax laws									1,801	1,393	0
Reduction in uncertain tax positions									(2,545)	(21,147)	(1,803)
Loss/(gain) on Company-owned life insurance									75	(1,250)	(3,673)
Nondeductible expense, net									880	1,847	2,039
Domestic manufacturing deduction									(2,651)	0	0
Other, net									(2,606)	548	(163)
Income tax expense/(benefit)	$ 28,006	$ 3,611	$ 11,700	$ (9,407)	$ 8,685	$ (10,247)	$ (5,743)	$ 3,764	$ 33,910	$ (3,541)	$ 37,892
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)									5.20%	15.50%	8.80%
Effect of enacted changes in tax laws (% of pre-tax)									1.80%	4.70%	0.00%
Reduction in uncertain tax positions (% of pre-tax)									(2.60%)	(70.80%)	(1.90%)
Loss/(gain) on Company-owned life insurance (% of pre-tax)									0.10%	(4.20%)	(3.90%)
Non deductible expense, net (% of pre-tax)									0.90%	6.20%	2.20%
Domestic manufacturing deduction (% of pre-tax)									(2.70%)	(0.00%)	(0.00%)
Other, net (% of pre-tax)									(2.70%)	1.80%	(0.20%)
Effective income tax rate									35.00%	(11.80%)	40.00%