Goodwill and Intangible Assets Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 27, 2015	Sep. 27, 2015
Goodwill
Balance at beginning of the period	$ 601,379
Goodwill adjustments	2,000
Foreign exchange impact	(9,375)
Balance at end of the period	594,004
WEI
Goodwill
Balance at beginning of the period	210,748
Foreign exchange impact	(3,750)
Balance at end of the period	206,998
Gross amounts of goodwill	289,400	$ 293,100
Accumulated impairment	82,400	82,400
RME
Goodwill
Balance at beginning of the period	390,631
Goodwill adjustments	2,000
Foreign exchange impact	(5,625)
Balance at end of the period	387,006
Gross amounts of goodwill	420,200	423,800
Accumulated impairment	$ 33,200	$ 33,200