XML 137 R42.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Organization of the Parent Company and The Operating Partnership Organization of the Parent Company and The Operating Partnership (Details) | Jun. 30, 2013
--- | ---
Organization of The Parent Company and The Operating Partnership [Line Items] |
Ownership in the Operating Partnership | 98.80%
Parent Company [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Net rentable square feet | 24,200,000
Area Owned By Company Of Undeveloped Parcels Of Land | 435
Area Of Additional Undeveloped Parcels Of Land With Option to Purchase | 51
Total potential development capacity | 6,200,000
Unconsolidated Real Estate Ventures [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Net rentable square feet | 6,200,000
Number Of Unconsolidated Real Estate Ventures | 17
Wholly-owned Management Company Subsidiaries [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Net rentable square feet | 30,800,000
Third Parties and Real Estate Ventures [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Net rentable square feet | 6,600,000
Total Properties [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 210
Office Properties [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 182
Industrial Facilities [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 19
Mixed Use Properties [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 5
Development Property [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 1
Redevelopment Property [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 2
Re-entitlement Property [Member] |
Organization of The Parent Company and The Operating Partnership [Line Items] |
Number of properties with ownership interest | 1

X
- Definition Area Of Additional Undeveloped Parcels Of Land With Option to Purchase + References No definition available. + Details
Name: | bdn_AreaOfAdditionalUndevelopedParcelsOfLandWithOptionToPurchase
Namespace Prefix: | bdn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area Owned by Company of Undeveloped Parcels Of Land + References No definition available. + Details
Name: | bdn_AreaOwnedbyCompanyofUndevelopedParcelsOfLand
Namespace Prefix: | bdn_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of unconsolidated real estate ventures. + References No definition available. + Details
Name: | bdn_NumberOfUnconsolidatedRealEstateVentures
Namespace Prefix: | bdn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | bdn_OrganizationOfParentCompanyAndOperatingPartnershipLineItems
Namespace Prefix: | bdn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of development that can be supported by undeveloped land + References No definition available. + Details
Name: | bdn_TotalPotentialDevelopmentCapacity
Namespace Prefix: | bdn_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
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