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Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 USD ($)
Goodwill [Line Items] |
Beginning balance | $ 3,746,094
Goodwill of acquired businesses | 135,482
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 3,881,576
Retail |
Goodwill [Line Items] |
Beginning balance | 2,351,291
Goodwill of acquired businesses | 657
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 2,351,948
National Programs |
Goodwill [Line Items] |
Beginning balance | 925,541
Goodwill of acquired businesses | 55,607
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 981,148
Wholesale Brokerage |
Goodwill [Line Items] |
Beginning balance | 298,101
Goodwill of acquired businesses | 79,110
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 377,211
Services |
Goodwill [Line Items] |
Beginning balance | 171,161
Goodwill of acquired businesses | 108
Goodwill disposed of relating to sales of businesses | 0
Ending balance | $ 171,269

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- 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. + Details
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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Details
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