Business Combinations - Additional Information (Details) € in Millions, £ in Millions							12 Months Ended
	May 01, 2018 USD ($)	Jul. 03, 2017 USD ($)	Jul. 03, 2017 EUR (€)	Jan. 10, 2017 USD ($)	Jan. 10, 2017 GBP (£)	May 24, 2016 USD ($)	Dec. 31, 2018 USD ($) Business	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 27, 2018	May 01, 2018 GBP (£)	Jul. 03, 2017 EUR (€)
Business Acquisition [Line Items]
Number of businesses acquired | Business							2
Total cash consideration							$ 33,500,000
Goodwill							217,662,000	$ 210,988,000
Amortization of intangible assets including cost of goods sold amortization							25,610,000	20,920,000	$ 12,415,000
Gain on business acquisition								26,409,000
Acquisition and related charges							6,016,000	7,196,000	4,975,000
Income from equity method investments								104,000	$ 2,191,000
Zettlex Holdings Limited
Business Acquisition [Line Items]
Percentage of shares acquired	100.00%										100.00%
Purchase price	$ 32,026,000										£ 23.3
Intangible assets	14,585,000
Goodwill	11,790,000
Goodwill assets expected to be deductible for tax purposes	0
Revenues							8,300,000
Income (loss) before income taxes							(1,800,000)
Amortization of intangible assets including cost of goods sold amortization							1,300,000
Compensation expense recognized under earn-out agreements							$ 4,400,000
Total purchase price, net of cash acquired	$ 28,250,000
World of Medicine GmbH
Business Acquisition [Line Items]
Percentage of shares acquired		100.00%										100.00%
Purchase price		$ 134,934,000										€ 118.1
Intangible assets		59,732,000
Goodwill		55,632,000
Goodwill assets expected to be deductible for tax purposes		0
Total purchase price, net of cash acquired		133,534,000
World of Medicine GmbH | Revolving Credit Facility
Business Acquisition [Line Items]
Amount draw-down to finance acquisition		$ 134,800,000	€ 118.0
Laser Quantum
Business Acquisition [Line Items]
Total cash consideration				$ 31,052,000	£ 25.5
Percentage of shares acquired				35.00%						24.00%
Purchase price				$ 87,271,000
Intangible assets				38,955,000
Goodwill				31,168,000
Goodwill assets expected to be deductible for tax purposes				$ 0
Percentage of equity interest held before acquisition				41.00%					41.00%
Percentage of equity interest held after acquisition				76.00%
Option to purchase and sell remaining shareholders shares, year							2020
Gain on business acquisition								26,400,000
Total purchase price, net of cash acquired				$ 15,709,000
Laser Quantum | Remaining Shareholders of Laser Quantum
Business Acquisition [Line Items]
Non controlling interest held by remaining shareholders				24.00%
Laser Quantum | Revolving Credit Facility
Business Acquisition [Line Items]
Amount draw-down to finance acquisition				$ 30,000,000
ThingMagic
Business Acquisition [Line Items]
Purchase price				19,089,000
Intangible assets				7,423,000
Goodwill				9,929,000
ThingMagic | Revolving Credit Facility
Business Acquisition [Line Items]
Amount draw-down to finance acquisition				$ 12,000,000
World of Medicine GmbH and Laser Quantum
Business Acquisition [Line Items]
Gain on business acquisition								26,400,000
Amortization of inventory fair value adjustments								4,400,000
Acquisition and related charges								4,300,000	$ 1,200,000
Income from equity method investments								100,000	2,200,000
World of Medicine GmbH and Laser Quantum | Increase in Amortization of Intangible Assets
Business Acquisition [Line Items]
Amortization of intangible assets including cost of goods sold amortization								5,300,000	12,500,000
World of Medicine GmbH and Laser Quantum | Increase in Interest Expense
Business Acquisition [Line Items]
Interest expense								1,400,000	3,900,000
Reach Technology Inc.
Business Acquisition [Line Items]
Percentage of shares acquired						100.00%
Total purchase price, net of cash acquired						$ 9,400,000
Closed Acquisitions
Business Acquisition [Line Items]
Acquisition and related charges							$ 1,100,000	$ 4,400,000	$ 200,000