Capital Assets (Other Capital Assets) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012	Sep. 29, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 33,283,000		$ 33,283,000		$ 33,194,000
Accumulated Amortization	(11,991,000)		(11,991,000)		(10,117,000)
Net Carrying Value	21,292,000		21,292,000		23,077,000
Weighted average useful life (in years)			14 years 3 months 18 days		14 years 3 months 18 days
Amortization expense	900,000	900,000	1,900,000	1,600,000
Software development costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,860,000		15,860,000		15,860,000
Accumulated Amortization	(7,504,000)		(7,504,000)		(6,125,000)
Net Carrying Value	8,356,000		8,356,000		9,735,000
Weighted average useful life (in years)			5 years 8 months 12 days		5 years 8 months 12 days
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,126,000		10,126,000		10,073,000
Accumulated Amortization	(3,248,000)		(3,248,000)		(2,871,000)
Net Carrying Value	6,878,000		6,878,000		7,202,000
Weighted average useful life (in years)			15 years 3 months 18 days		15 years 3 months 18 days
Trademarks and trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,050,000		6,050,000		6,020,000
Accumulated Amortization	(1,128,000)		(1,128,000)		(1,024,000)
Net Carrying Value	4,922,000		4,922,000		4,996,000
Weighted average useful life (in years)			30 years 2 months 12 days		30 years 2 months 12 days
Land-use rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,247,000		1,247,000		1,241,000
Accumulated Amortization	(111,000)		(111,000)		(97,000)
Net Carrying Value	$ 1,136,000		$ 1,136,000		$ 1,144,000
Weighted average useful life (in years)			47 years 9 months 18 days		47 years 9 months 18 days