Financing (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Apr. 02, 2016	Oct. 03, 2015
Line of Credit Facility [Abstract]
Line of credit facility, maximum borrowing capacity	$ 200,000
Line of credit facility, outstanding borrowings	$ 21,387	$ 21,183
Line of credit facility, expiration date	Sep. 01, 2019
Letters of credit outstanding, amount	$ 21,346	12,008
Line of credit facility, remaining borrowing capacity	$ 157,267	$ 166,809
Variable Rate Credit Facility [Member]
Line of Credit Facility [Abstract]
Line of credit facility, interest rate	1.45%
Variable Rate Credit Facility [Member] | Bank Line Of Credit, Monthly U.S. LIBOR Plus 100 Basis Points [Member]
Line of Credit Facility [Abstract]
Line of credit facility, interest rate		1.20%
Variable Rate Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Abstract]
LIBOR plus, basis points	1.00%	1.00%