Summary Of Significant Accounting Policies (Narrative 1) (Details) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 17, 2014 USD ($)	Oct. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)	Oct. 03, 2015 USD ($) segment	Sep. 27, 2014 USD ($)	Sep. 28, 2013 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Maximum number of months for manufacturing and delivery that divides short and long term contracts for revenue recognition				6 months
Minimum number of months that long term contract may contain non-routine installations and special acceptance protocols in months				6 months
Foreign currency transaction gain (loss), before tax				$ 2,510	$ 1,412	$ 1,718
Amortization expense on capitalized computer software				2,403	2,759	2,759
Capitalization of software development costs				$ 2,834	853	0
Number of reporting units | segment				2
Goodwill		$ 27,677	$ 26,123	$ 27,677	26,123	16,624
Goodwill impairment		0	0	0	0
Intangible assets impairment				$ 0	0
Number of previous months historical warranty claims used to calculate warranty expense percentage (in months)				12 months
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percent fair value is less than carrying amount				50.00%
Life of warranty obligations for sales that include installation services, in months				12 months
Product obligation period from date of purchase, in months				12 months
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Life of warranty obligations for sales that include installation services, in months				24 months
Product obligation period from date of purchase, in months				24 months
Research And Development [Member]
Summary Of Significant Accounting Policies [Line Items]
Capitalization of software development costs				$ 1,966	494
Test [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill		26,243	24,584	26,243	24,584	15,028
Sensors [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill		$ 1,434	$ 1,539	$ 1,434	$ 1,539	$ 1,596
Roehrig Engineering, Inc. "REI" [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 11,183
Total estimated purchase price	14,842
Goodwill impairment	$ 0