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Statutory Financial Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 12 Months Ended
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May 20, 2014 | Dec. 31, 2014
WNFIC [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus |  | $ 10.9 us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance / us-gaap_SubsegmentsAxis = bro_WrightNationalFloodInsuranceCompanyMember
Statutory net Income |  | 2.3 us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount / us-gaap_SubsegmentsAxis = bro_WrightNationalFloodInsuranceCompanyMember
Issuance and payment of extraordinary dividend | 7.0 bro_PaymentsOfExtraordinaryDividends / us-gaap_SubsegmentsAxis = bro_WrightNationalFloodInsuranceCompanyMember |
Regulatory Authorities [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus |  | $ 7.5 us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance / us-gaap_SubsegmentsAxis = bro_RegulatoryMember

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- Definition Payments of extraordinary dividends. + References No definition available. + Details
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- Details
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- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.23(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 24 -Subparagraph c -Article 7 + Details
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- Definition Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.23(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 24 -Subparagraph c -Article 7 + Details
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- Details
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