Description of Business and Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Disaggregation of Revenue [Line Items]
Exchange gains (losses) on foreign currency transactions	$ 2,300,000	$ (1,700,000)	$ 1,300,000
Forward currency exchange contracts treated as cash flow hedges and recorded in accumulated other comprehensive loss	2,405,000	8,967,000	$ (11,223,000)
Fair value of debt	284,500,000	251,400,000
Carrying value of debt	283,000,000	$ 250,000,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net impact to fiscal 2017 opening retained earnings balance	$ 0
Engineering Design and Development Services
Disaggregation of Revenue [Line Items]
Percentage of consolidated net sales (less than)	5.00%	5.00%	5.00%
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net operating loss carryforward related to tax deductions in excess of compensation expense for stock options		$ 4,900,000
Increase to valuation allowance		4,900,000
Accounting Standards Update 2016-09 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net impact to fiscal 2017 opening retained earnings balance		$ 0