Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Income Taxes [Line Items]
Recognition of tax benefits due to research and development tax credit legislation	$ 2,098	$ 2,563	$ 2,430
R&D tax credit carryover	993	326
Foreign undistributed earnings	78,957	81,325
Unrecognized tax benefits that would affect the effective tax rate	2,265	3,833
Accrued interest related to uncertain income tax positions	274	248
Accrual for penalties related to uncertain tax positions	0	0
Current income tax receivable	876	6,507
Tax Year 2011 And Tax Year 2012 [Member]
Income Taxes [Line Items]
Tax (expense) benefit associated with favorable resolution of audit matters	1,836
Swiss [Member]
Income Taxes [Line Items]
Net operating loss carryovers	383
Operating loss carryforwards, valuation allowance	$ 84
Operating loss carryforwards, limitations of use period	7 years
Minnesota (R&D) [Member]
Income Taxes [Line Items]
R&D tax credit carryover	$ 992
R&D carryforward period	15 years
Germany And Japan [Member]
Income Taxes [Line Items]
Repatriation of foreign earnings, amount	$ 9,194		14,493
Tax (expense) benefit related to repatriations	$ 1,057		$ 517
Germany, Japan, And Korea [Member]
Income Taxes [Line Items]
Repatriation of foreign earnings, amount		9,587
Tax (expense) benefit related to repatriations		$ 98