Shareholders' Equity (Capped Calls) (Details) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 02, 2016 USD ($) shares $ / shares	Sep. 29, 2018 shares $ / shares	Sep. 30, 2017 shares	Oct. 01, 2016 USD ($)
Class of Stock [Line Items]
Additional paid in capital, capped calls | $	$ 7,935			$ 7,935
Initial capped calls equivalent shares (in shares)	2,282,000
Capped calls settled, percentage			10.00%
Settlement of capped calls (in shares)		0	12,000
Minimum [Member] | Common Stock [Member]
Class of Stock [Line Items]
Common stock to be received and retired under capped calls (in shares)		0
Maximum [Member] | Common Stock [Member]
Class of Stock [Line Items]
Common stock to be received and retired under capped calls (in shares)		268,000
Original Capped Call Agreements [Member] | Minimum [Member]
Class of Stock [Line Items]
Strike price, capped calls (in dollars per share) | $ / shares	$ 50.40
Original Capped Call Agreements [Member] | Maximum [Member]
Class of Stock [Line Items]
Strike price, capped calls (in dollars per share) | $ / shares	$ 58.80
Amended Capped Call Agreements [Member]
Class of Stock [Line Items]
Capped calls outstanding equivalent shares (in shares)		2,054,000
Amended Capped Call Agreements [Member] | Minimum [Member]
Class of Stock [Line Items]
Strike price, capped calls (in dollars per share) | $ / shares		$ 50.40
Amended Capped Call Agreements [Member] | Maximum [Member]
Class of Stock [Line Items]
Strike price, capped calls (in dollars per share) | $ / shares		$ 57.97