Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Mar. 27, 2016	Mar. 29, 2015
Income tax expense (benefit)	$ 12,389,000	$ 717,000	$ 19,535,000	$ 7,215,000
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 31,872,000	$ 2,759,000	$ 50,526,000	$ 19,264,000
Effective Income Tax Rate Reconciliation, Percent	38.90%	26.00%	38.70%	37.50%