XML 31 R24.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Nature of Operations - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2012 Segment
Number of reportable segments | 4
Number of units | 2

X
- Definition Number of units + References No definition available. + Details
Name: | bro_NumberOfUnits
Namespace Prefix: | bro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration