Business Combinations Assets Acquired (Details) - USD ($) $ in Thousands					12 Months Ended
		Jan. 07, 2018	May 13, 2017	Jul. 02, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2018	Jun. 27, 2018	Jan. 05, 2018	May 11, 2017	Jul. 01, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, net					$ 51,319	$ 215,823
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets										$ 2,760
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill										$ 1,845
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized			$ (10,615)
Business Combination, Bargain Purchase, Gain Recognized, Amount					0	(9,309)	$ 0
Business Combination, Consideration Transferred		$ 1,200		$ 244,300
Impairment of Intangible Assets, Finite-lived					$ 152,330	$ 0	$ 0
Acquired rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Consideration Transferred				216,700
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Consideration Transferred				23,900
LENSAR [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents											$ 1,983
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets											58,323
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment											18,647
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	[1]										11,970
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets											25,723
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities											$ (6,673)
Business Combination, Bargain Purchase, Gain Recognized, Amount			(9,309)
Business Combination, Consideration Transferred			$ 31,726
Noden [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					8 years
Intangible assets, net								$ 40,100	$ 192,500
Indefinite-lived Intangible Assets Acquired				3,735
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets												$ 244,305
Business Combination, Consideration Transferred				244,305
Impairment of Intangible Assets, Finite-lived					$ 152,300
Noden [Member] | Acquired rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired				216,690
Noden [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired				$ 23,880

[1] (1) As of the effective date of the transaction, identifiable intangible assets are required to be measured at fair value. The fair value measurement is based on significant inputs that are unobservable in the market and thus represents a Level 3 measurement. The Company used an income approach to estimate the preliminary fair value of the intangibles which includes technology, trademarks and customer relationships. The assumptions used to estimate the cash flows of the business included a discount rate of 16%, estimated gross margins ranging from 37-72%, income tax rate of 35%, and operating expenses consisting of direct costs based on the anticipated level of revenues. The intangible assets have a weighted-average useful life of approximately 15 years. The intangible assets for acquired technology and trademarks are being amortized over their estimated useful lives using the straight-line method of amortization. The intangible assets for customer relationship are being amortized using a double-declining method of amortization as such method better represents the economic benefits to be obtained.