Employee Benefit Plans (Details)	12 Months Ended
	Sep. 27, 2015 USD ($) Year	Sep. 28, 2014 USD ($)	Sep. 29, 2013 USD ($)
Postemployment Benefits [Abstract]
Maximum annual contribution per employee, percent	50.00%
Minimum age employee may contribute additional percentage of wages | Year	50
Maximum additional contribution allowed after age 50, percent	75.00%
Employer contributions	$ 3,700,000
Fair value of plan assets	4,300,000
Benefit obligations	(6,700,000)
Unrealized actuarial loss on pension benefits	(300,000)	$ (700,000)	$ (200,000)
Assumptions used calculating benefit obligation, discount rate		2.10%	3.20%
Estimated future employer contributions in the next twelve months	$ 0