Restructuring - Narrative (Details) $ in Thousands		2 Months Ended	3 Months Ended				12 Months Ended
	Feb. 14, 2020 headcount	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs			$ 1,524		$ 13,688	$ 49,000
EBITDA target			20.00%
Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 13,688	$ 1,524
Payments for restructuring		927	1,417
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Photonics and 3D Design
Restructuring Cost and Reserve [Line Items]
Restructuring noncash expense							$ 400
Proceeds from divestiture of businesses				$ 700
Professional fees and other related charges
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | headcount	500
Incurred cost							15,800
Professional fees and other related charges | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		732	481
Payments for restructuring		$ 74	576
Professional fees and other related charges | Goodwill
Restructuring Cost and Reserve [Line Items]
Restructuring costs						21,200
Professional fees and other related charges | Excess and Obsolete Inventory
Restructuring Cost and Reserve [Line Items]
Restructuring costs						12,800
Professional fees and other related charges | Acquired Assets
Restructuring Cost and Reserve [Line Items]
Restructuring costs						10,500
Professional fees and other related charges | Capitalized Patents
Restructuring Cost and Reserve [Line Items]
Restructuring costs						1,400
Professional fees and other related charges | Other Assets
Restructuring Cost and Reserve [Line Items]
Restructuring costs						$ 3,400
Professional fees and other related charges | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cash			6,000
Professional fees and other related charges | Minimum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost			5,000
Professional fees and other related charges | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cash			8,000
Professional fees and other related charges | Maximum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost			15,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			$ 1,400				$ 13,100