XML 84 R69.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Parenthetical) (Details) - USD ($) $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |
Deconsolidated mortgage loan |  | $ 20,582 | $ 0 |
Deconsolidated financing liability |  | 12,384 | $ 0 |
Other liabilities |  | 31,399 |  | $ 31,379
evo at Cira Centre South Venture [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net increase of investment in unconsolidated real estate ventures |  | $ 4,800 |  |
Brandywine - AI Venture LLC [Member] | 3141 Fairview Park Drive [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Deconsolidated net assets | $ 45,600 |  |  |
Deconsolidated mortgage loan | 20,582 |  |  |
Deconsolidated financing liability | $ 12,384 |  |  |
Coppell Associates [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Other liabilities |  |  |  | $ 1,100

X
- Definition Deconsolidation of variable interest entity, financing liability. + References No definition available. + Details
Name: | bdn_DeconsolidationOfVariableInterestEntityFinancingLiability
Namespace Prefix: | bdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deconsolidation of variable interest entity, mortgage loan. + References No definition available. + Details
Name: | bdn_DeconsolidationOfVariableInterestEntityMortgageLoan
Namespace Prefix: | bdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deconsolidation of variable interest entity, net assets. + References No definition available. + Details
Name: | bdn_DeconsolidationOfVariableInterestEntityNetAssets
Namespace Prefix: | bdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net increase of investment in unconsolidated real estate ventures. + References No definition available. + Details
Name: | bdn_NetIncreaseOfInvestmentInUnconsolidatedRealEstateVentures
Namespace Prefix: | bdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of liabilities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bdn_EvoAtCiraCentreSouthVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bdn_BrandywineAlVentureLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=bdn_A3141FairviewParkDriveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bdn_CoppellAssociatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |