Discontinued Operations and Divestitures - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	Apr. 30, 2015	Jul. 31, 2014	Sep. 30, 2016	Oct. 02, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs				$ 29,570
JK Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs	$ 29,600
Pre-tax gain (loss) on sale of business				$ 19,600
Scientific Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs		$ 6,500
Sale proceeds held in escrow		$ 1,500
Sale proceeds held in escrow, period			2016-01