Acquisitions - Amounts of Assets and Liabilities at Fair Value as of Acquisition Date (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Nov. 15, 2018	Sep. 30, 2018	Apr. 20, 2018	Apr. 06, 2018	Oct. 05, 2017
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 490,525		$ 255,876
GENEWIZ
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable		$ 26,952
Inventories		4,370
Prepaid expenses and other current assets		11,210
Property, plant and equipment		36,379
Goodwill		236,504
Intangible assets, finite-lived		188,524
Other assets		15,998
Current portion of long-term debt		(3,170)
Accounts payable		(6,522)
Deferred revenue		(67)
Accrued compensation and benefits		(5,145)
Other current liabilities		(6,771)
Long-term debt		(2,482)
Long term tax reserves		(13,400)
Long-term deferred tax liabilities		(37,415)
Other long-term liabilities		(2,602)
Total purchase price		$ 442,363
Tec-Sem Group AG
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable					$ 988
Inventories					4,297
Prepaid expenses and other current assets					4,038
Property, plant and equipment					85
Goodwill					7,665
Intangible assets, finite-lived					10,694
Accounts payable					(1,049)
Accrued liabilities					(6,962)
Deferred tax liabilities					(1,391)
Accrued pension liability					(2,800)
Total purchase price					$ 15,565
4titude Limited
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable						$ 1,581
Inventories						2,667
Prepaid expenses and other current assets						140
Property, plant and equipment						1,555
Goodwill						38,185
Intangible assets, finite-lived						27,212
Accounts payable						(286)
Accrued liabilities						(845)
Deferred tax liabilities						(5,090)
Total purchase price						$ 65,119
BioSpeciMan Corporation
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable				$ 300
Goodwill				2,700
Intangible assets, finite-lived				2,600
Assumed liabilities				700
Total purchase price				$ 5,200