Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Effective Income Tax Rate Reconciliation, Amount:
Tax at federal statutory rate									$ 10,685	$ 33,863	$ 10,448
State and local taxes, net									3,095	5,093	4,620
Effect of enacted changes in tax laws									0	1,801	1,393
Reduction in uncertain tax positions									(4,534)	(2,545)	(21,147)
Loss/(gain) on Company-owned life insurance									(736)	75	(1,250)
Nondeductible expense, net									1,115	880	1,847
Domestic manufacturing deduction									(1,820)	(2,651)	0
Foreign Earnings and Dividends									(2,418)	(1,214)	453
Other, net									(966)	(1,392)	95
Income tax expense/(benefit)	$ 13,377	$ 121	$ 124	$ (9,201)	$ 28,006	$ 3,611	$ 11,700	$ (9,407)	$ 4,421	$ 33,910	$ (3,541)
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)									10.10%	5.20%	15.50%
Effect of enacted changes in tax laws (% of pre-tax)									0.00%	1.80%	4.70%
Reduction in uncertain tax positions (% of pre-tax)									(14.90%)	(2.60%)	(70.80%)
Loss/(gain) on Company-owned life insurance (% of pre-tax)									(2.40%)	0.10%	(4.20%)
Non deductible expense, net (% of pre-tax)									3.70%	0.90%	6.20%
Domestic manufacturing deduction (% of pre-tax)									(6.00%)	(2.70%)	(0.00%)
Foreign Earnings and Dividends (% of pre-tax)									(7.90%)	(1.30%)	1.50%
Other, net (% of pre-tax)									(3.20%)	(1.40%)	0.30%
Effective income tax rate									14.40%	35.00%	(11.80%)