XML 81 R66.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Segment Information - Net Operating Income of Company's Reportable Segments (Parenthetical) (Details) - property | Jun. 30, 2016 | Jun. 22, 2015
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Number of Properties | 120 |
Austin, Texas [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of Properties | 7 |
Broadmoor Austin Associates [Member] |  |
Segment Reporting Information [Line Items] |  |
Percentage of ownership interests |  | 50.00%

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bdn_AustinTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=bdn_BroadmoorAustinAssociatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |