Leases - Reconciliation of Termination Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016
Reconciliation of the beginning and ending balances of liabilities related to contract termination costs
Balance at the beginning of the period	$ 3,104	$ 3,169
Cost transfer between groups		0
Cost incurred and charged to expense		2,167
Adjustments	(1,410)	(2,232)
Balance at the end of the period	1,694	3,104
WEI
Reconciliation of the beginning and ending balances of liabilities related to contract termination costs
Balance at the beginning of the period	1,552	531
Cost transfer between groups		637
Cost incurred and charged to expense		1,418
Adjustments	(1,009)	(1,034)
Balance at the end of the period	543	1,552
RME
Reconciliation of the beginning and ending balances of liabilities related to contract termination costs
Balance at the beginning of the period	1,513	2,461
Cost transfer between groups		(637)
Cost incurred and charged to expense		749
Adjustments	(365)	(1,060)
Balance at the end of the period	1,148	1,513
RCM
Reconciliation of the beginning and ending balances of liabilities related to contract termination costs
Balance at the beginning of the period	39	177
Cost transfer between groups		0
Cost incurred and charged to expense		0
Adjustments	(36)	(138)
Balance at the end of the period	$ 3	$ 39