Subsequent Events (Details) $ / shares in Units, € in Millions	12 Months Ended
	Oct. 01, 2016 USD ($)	Nov. 07, 2016 EUR (€)	Nov. 07, 2016 USD ($) $ / shares	Aug. 01, 2016 EUR (€)
Subsequent Event [Line Items]
Business acquisition, cash paid for acquired entity	$ 904,500,000
Subsequent Event
Subsequent Event [Line Items]
Business acquisition, share price (dollars per share) | $ / shares			$ 32.50
Cancellation of options held by Rofin employee			$ 15,300,000
Revolving facility to finance acquisition of Rofin			100,000,000
Letter of credit limit to borrow against revolving facility to finance acquisition of Rofin			30,000,000
Swing line limit to borrow against revolving facility to finance acquisition of Rofin			10,000,000
Total amount plan to borrow under revolving facility to finance acquisition of Rofin			150,000,000
Term loan prepay condition of any extraordinary receipts in any fiscal year			$ 10,000,000
Euro
Subsequent Event [Line Items]
forward contract purchased for the term loan | €				€ 670.0
Euro | Subsequent Event
Subsequent Event [Line Items]
forward contract purchased for the term loan | €		€ 670.0
Revolving facility used to issue letter of credit for Rofin acquisition | €		€ 10.0
Union Bank of California, Unsecured Revolving Credit Account | Line of Credit, Domestic
Subsequent Event [Line Items]
Lines of credit	$ 50,000,000