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Acquisitions Of Businesses (Details) $ in Thousands						10 Months Ended
	Jan. 04, 2019 Company	Nov. 01, 2018 Company	Oct. 02, 2018 Company	May 03, 2018 Company	Apr. 04, 2018 Company	Nov. 01, 2018 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill							$ 1,004,710	$ 990,887
Number of businesses acquired | Company	1	1	1	1	1
2018 Acquisitions
Business Acquisition [Line Items]
Purchase price						$ 71,600
Working capital acquired								8,900
Goodwill								26,100
Identifiable intangible assets								$ 36,600

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- Definition

The amount of acquisition cost of a business combination allocated to working capital.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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