Restructuring - Narrative (Details) $ in Thousands		3 Months Ended			5 Months Ended	6 Months Ended		12 Months Ended
	Feb. 14, 2020 headcount	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 779	$ 636	$ 49,000		$ 2,303	$ 14,324
EBITDA target						20.00%
Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					$ 13,974	$ 2,303
Payments for restructuring					6,902	3,536
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					1,574	823
Payments for restructuring					$ 1,523	1,279
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				6,000
Professional fees and other related charges | Forecast | Minimum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost									$ 5,000
Professional fees and other related charges | Forecast | Maximum | Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected cost									$ 15,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Payments for restructuring						$ 3,500		$ 13,100