Capital Assets (Other Capital Assets) (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Sep. 29, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 33,337,000		$ 33,194,000
Accumulated Amortization	(11,077,000)		(10,117,000)
Net Carrying Value	22,260,000		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	700,000
Software development costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,859,000		15,860,000
Accumulated Amortization	(6,814,000)		(6,125,000)
Net Carrying Value	9,045,000		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	10,159,000		10,073,000
Accumulated Amortization	(3,077,000)		(2,871,000)
Net Carrying Value	7,082,000		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	6,067,000		6,020,000
Accumulated Amortization	(1,081,000)		(1,024,000)
Net Carrying Value	4,986,000		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	1,252,000		1,241,000
Accumulated Amortization	(105,000)		(97,000)
Net Carrying Value	$ 1,147,000		$ 1,144,000
Weighted average useful life (in years)	47 years 9 months 18 days		47 years 9 months 18 days