Restructuring and Related Costs Restructuring and Related Costs (Restructuring Reserve Rollforward) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 01, 2017	Oct. 01, 2016	Apr. 01, 2017
Restructuring Reserve [Roll Forward]
Beginning balance			$ 2,296,000
Restructuring expense		$ 1,872,000	944,000
Payments			(924,000)
Other adjustments			12,000
Currency translation			(169,000)
Ending Balance	$ 2,159,000	2,296,000	2,159,000
Q3 2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			308,000
Restructuring expense			0
Payments			(157,000)
Other adjustments			0
Currency translation			(13,000)
Ending Balance	138,000	308,000	138,000
Q4 2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			935,000
Restructuring expense			944,000
Payments			(600,000)
Other adjustments			0
Currency translation			(105,000)
Ending Balance	1,174,000	935,000	1,174,000
2014 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			1,053,000
Restructuring expense	0		0
Payments			(167,000)
Other adjustments			12,000
Currency translation			(51,000)
Ending Balance	$ 847,000	$ 1,053,000	$ 847,000