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Acquisitions Of Businesses (Details) $ in Thousands |  |  |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 02, 2020 Company | Nov. 01, 2019 USD ($) Company | Oct. 31, 2019 Company | Sep. 16, 2019 Company | Aug. 01, 2019 Company | May 10, 2019 Company | Apr. 01, 2019 Company | Jan. 04, 2019 Company | Dec. 31, 2019 USD ($) | Jun. 30, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 1,063,911 | $ 839,772
Number of businesses acquired | Company | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |  |
BKI [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |  |  |  |  |  |  |  |
Purchase price |  | $ 220,300 |  |  |  |  |  |  |  |
Working capital acquired |  | 29,800 |  |  |  |  |  |  |  |
Other net assets |  | 4,900 |  |  |  |  |  |  |  |
Goodwill |  | 43,900 |  |  |  |  |  |  |  |
Identifiable intangible assets |  | $ 141,700 |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  | 10 years 6 months |
2019 Acquisitions, excluding BKI |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  | $ 85,400 |
Working capital acquired |  |  |  |  |  |  |  |  | 25,300 |
Other net assets |  |  |  |  |  |  |  |  | 1,300 |
Goodwill |  |  |  |  |  |  |  |  | 29,200 |
Identifiable intangible assets |  |  |  |  |  |  |  |  | $ 29,600 |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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