Supplemental Financial Information - Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Condensed Financial Information [Abstract]
Interest cost	$ 1,411	$ 1,426	$ 4,232	$ 4,280
Expected return on plan assets	(1,528)	(1,599)	(4,584)	(4,798)
Amortization of prior loss	1,196	913	3,590	2,739
Net periodic benefit cost	1,079	740	3,238	2,221
Amortization of prior loss, recognized in other comprehensive income	1,196	913	3,590	2,739
Total recognized in net periodic pension benefit cost and other comprehensive income	$ (117)	$ (173)	$ (352)	$ (518)