|12 Months Ended|
Sep. 30, 2017
|Goodwill and Intangible Assets Disclosure [Abstract]|
|Changes in Carrying Amount of Goodwill||
Changes in the carrying amount of goodwill for the fiscal years ended September 30, 2017, September 24, 2016 and September 26, 2015 (in thousands):
Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.
Reference 1: http://www.xbrl.org/2003/role/presentationRef