Goodwill and Intangible Assets (Details) $ in Thousands	3 Months Ended
	Dec. 26, 2015 USD ($)
Changes in the carrying amount of goodwill
Balance at the beginning of the period	$ 747,406
Foreign currency effect	(12,415)
Balance at the end of the period	734,991
Domestic
Changes in the carrying amount of goodwill
Balance at the beginning of the period	423,958
Foreign currency effect	(1,073)
Balance at the end of the period	422,885
Canada
Changes in the carrying amount of goodwill
Balance at the beginning of the period	323,448
Foreign currency effect	(11,342)
Balance at the end of the period	$ 312,106