Restructuring - Narrative (Details) $ in Thousands		2 Months Ended	3 Months Ended				6 Months Ended
	Feb. 14, 2020 USD ($) headcount	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs			$ 636			$ 0	$ 14,324	$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Photonics and 3D Design
Restructuring Cost and Reserve [Line Items]
Proceeds from divestiture of businesses			600
Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Incurred cost					$ 49,000
Restructuring costs		$ 13,974
Payments for restructuring		6,902
Professional fees and other related charges | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | headcount	500
Incurred cost			600	$ 13,700
Restructuring costs		1,574
Payments for restructuring		$ 1,523
Professional fees and other related charges | Goodwill | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					21,200
Professional fees and other related charges | Excess and Obsolete Inventory | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					12,800
Professional fees and other related charges | Acquired Assets | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					10,500
Professional fees and other related charges | Capitalized Patents | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					1,400
Professional fees and other related charges | Other Assets | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					$ 3,400
Professional fees and other related charges | Minimum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost			12,000				12,000
Restructuring and related cost, cash	$ 11,000
Professional fees and other related charges | Maximum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost			22,000				$ 22,000
Restructuring and related cost, cash	$ 15,000
Employee Severance | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			$ 4,500	$ 900