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Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2015 USD ($)
Goodwill [Roll Forward] |
Beginning balance | $ 2,460,611
Goodwill of acquired businesses | 100,632
Goodwill disposed of relating to sales of businesses | (2,238)
Ending balance | 2,559,005
Retail |
Goodwill [Roll Forward] |
Beginning balance | 1,231,869
Goodwill of acquired businesses | 78,018
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 1,309,887
National Programs |
Goodwill [Roll Forward] |
Beginning balance | 886,095
Goodwill of acquired businesses | 18,009
Goodwill disposed of relating to sales of businesses | (2,238)
Ending balance | 901,866
Wholesale Brokerage |
Goodwill [Roll Forward] |
Beginning balance | 222,356
Goodwill of acquired businesses | 4,605
Goodwill disposed of relating to sales of businesses | 0
Ending balance | 226,961
Services |
Goodwill [Roll Forward] |
Beginning balance | 120,291
Goodwill of acquired businesses | 0
Goodwill disposed of relating to sales of businesses | 0
Ending balance | $ 120,291

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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Balance Type: | debit
Period Type: | instant

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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- Details
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- Details
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- Details
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