Income Taxes - Income Tax Expense (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
Current tax expense/(benefit)
Federal									$ 41,199	$ 17,397	$ 18,903
Foreign									485	583	681
State and local									5,919	(25,625)	8,371
Total current tax expense/(benefit)									47,603	(7,645)	27,955
Deferred tax expense
Federal									(14,554)	4,014	5,426
Foreign									0	0	0
State and local									861	90	4,511
Total deferred tax (benefit)/expense									(13,693)	4,104	9,937
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
Operating loss carryforward, State and local	$ 3,800				$ 7,500				$ 3,800	$ 7,500
Maximum [Member]
Deferred tax expense
Operating loss carryforwards, remaining life									18 years