Financing (Narrative) (Details) (USD $)	3 Months Ended
	Jun. 30, 2012	Oct. 01, 2011	Jul. 02, 2011
Line of Credit Facility [Abstract]
Line of credit facility, interest rate at period end (in hundredths)	0.70%
Line of Credit Facility, Expiration Date	Dec. 31, 2012
Bank line of credit facility, amount outstanding	$ 40,000,000	$ 40,000,000
Line of credit facility, borrowing capacity	75,000,000
Letters of credit outstanding, amount	10,000,000
Line of credit facility, remaining borrowing capacity	25,000,000
Notional amounts of outstanding interest rate swaps	$ 40,000,000	$ 24,000,000	$ 24,000,000
Weighted average fixed interest rate payable (in hundredths)	2.09%	2.47%
Bank line of credit facility, basis spread on U.S. LIBOR	0.45%
Effective interest rate applicable to outstanding credit facility (in hundredths)	2.54%	2.92%