Capital Assets (Details) (USD $)	12 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 03, 2009
Property and equipment [Abstract]
Property and equipment, gross	$ 162,620,000	$ 158,654,000
Less accumulated depreciation	(106,368,000)	(102,210,000)
Property and equipment, net	56,252,000	56,444,000	56,118,000
Goodwill	16,027,000	15,429,000
Other intangible assets [Abstract]
Gross carrying amount	35,012,000	30,465,000
Accumulated amortization	(9,169,000)	(5,712,000)
Net carrying value	25,843,000	24,753,000
Weighted average useful life (in years)	13.6	14.7
Amortization expense	3,300,000	3,000,000	2,400,000
Estimated future amortization expense related to other intangible assets [Abstract]
2012	3,503,000
2013	3,715,000
2014	3,715,000
2015	3,703,000
2016	2,191,000
Software development costs [Member]
Other intangible assets [Abstract]
Gross carrying amount	15,370,000	11,640,000
Accumulated amortization	(3,574,000)	(2,062,000)
Net carrying value	11,796,000	9,578,000
Weighted average useful life (in years)	5.8	6.0
Amortization expense	1,500,000	1,300,000
Patents [Member]
Other intangible assets [Abstract]
Gross carrying amount	9,903,000	9,484,000
Accumulated amortization	(2,114,000)	(1,347,000)
Net carrying value	7,789,000	8,137,000
Weighted average useful life (in years)	15.3	15.3
Trademarks and trade names [Member]
Other intangible assets [Abstract]
Gross carrying amount	5,924,000	5,689,000
Accumulated amortization	(815,000)	(603,000)
Net carrying value	5,109,000	5,086,000
Weighted average useful life (in years)	30.2	30.2
Non-compete agreements [Member]
Other intangible assets [Abstract]
Gross carrying amount	2,596,000	2,485,000
Accumulated amortization	(2,596,000)	(1,657,000)
Net carrying value	0	828,000
Weighted average useful life (in years)	3.0	3.0
Land-use rights [Member]
Other intangible assets [Abstract]
Gross carrying amount	1,219,000	1,167,000
Accumulated amortization	(70,000)	(43,000)
Net carrying value	1,149,000	1,124,000
Weighted average useful life (in years)	47.8	47.8
Land and improvements [Member]
Property and equipment [Abstract]
Property and equipment, gross	1,713,000	1,714,000
Building and improvements [Member]
Property and equipment [Abstract]
Property and equipment, gross	52,764,000	52,535,000
Machinery and equipment [Member]
Property and equipment [Abstract]
Property and equipment, gross	$ 108,143,000	$ 104,405,000