Business Acquisition (Narrative) (Details) - USD ($) $ in Thousands			12 Months Ended
	Jun. 29, 2015	Jun. 17, 2014	Oct. 03, 2015	Dec. 27, 2014	Sep. 27, 2014	Sep. 28, 2013
Business Acquisition [Line Items]
Identifiable assets acquired and the liabilities assumed			$ 27,677		$ 26,123	$ 16,624
Roehrig Engineering, Inc. "REI" [Member]
Business Acquisition [Line Items]
Total estimated purchase price		$ 14,842
Cash paid		14,192
Escrow Deposit		2,000
Identifiable assets acquired and the liabilities assumed		11,183
Adjustment to deferred tax liability		$ 1,445		$ 1,734
Instrument And Calibration Sweden AB (ICS) [Member]
Business Acquisition [Line Items]
Total estimated purchase price	$ 667
Maximum [Member] | Roehrig Engineering, Inc. "REI" [Member]
Business Acquisition [Line Items]
Estimated earn-out-based contingent consideration			$ 2,000