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BUSINESS ACQUISITIONS - Definite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 29, 2019	Apr. 03, 2018
Citoxlab
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 161,100
Weighted Average Amortization Life	12 years
MPI Research
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 309,200
Weighted Average Amortization Life		12 years
Client relationships | Citoxlab
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 133,500
Weighted Average Amortization Life	13 years
Client relationships | MPI Research
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 264,900
Weighted Average Amortization Life		13 years
Developed technology | Citoxlab
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 19,900
Weighted Average Amortization Life	3 years
Developed technology | MPI Research
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 23,400
Weighted Average Amortization Life		3 years
Backlog | Citoxlab
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 7,700
Weighted Average Amortization Life	1 year
Backlog | MPI Research
Business Acquisition [Line Items]
Definite-Lived Intangible Assets		$ 20,900
Weighted Average Amortization Life		1 year

X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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