Shareholders' Equity - Narrative (Details) - 2017 Stock Repurchase Program - USD ($)	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jun. 06, 2016
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount			$ 150,000,000
Amount repurchased (in shares)	158,466	144,729
Amount repurchased	$ 9,500,000	$ 7,100,000
Average repurchase price (in dollars per share)	$ 60.25	$ 48.79