XML 69 R74.htm IDEA: XBRL DOCUMENT ﻿
v2.3.0.11

Partners Equity of The Operating Partnership (DetailsTextuals) (USD $) | 6 Months Ended |  | 6 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 30, 2011 | Aug. 05, 2010 | Aug. 05, 2010 BRANDYWINE OPERATING PARTNERSHIP, L.P. Class F (2010) Units [Member] | Jun. 30, 2011 BRANDYWINE OPERATING PARTNERSHIP, L.P. | May 31, 2011 BRANDYWINE OPERATING PARTNERSHIP, L.P. | Jun. 30, 2011 7.50% Series D Preferred Shares | Jun. 30, 2011 7.375% Series E Preferred Shares
Partners Equity of The Operating Partnership (Textuals) [Abstract] |  |  |  |  |  |  |
Distribution Declared per common partnership unit |  |  |  |  | $ 0.15 |  |
Distribution Declared for common partnership unitholders |  |  |  |  | $ 20,500,000 |  |
Distributions paid Preferred unitholders |  |  |  |  |  | 900,000 | 1,100,000
Preferential return for series C | 7.50% |  |  |  |  |  |
Preferential return for series D | 7.375% |  |  |  |  |  |
Net proceeds contributed by Parent Company | 8,000,000 |  |  |  |  |  |
Issue of shares under Offering Program | 679,285 |  |  |  |  |  |
Common partnership units issued to the parent company |  |  |  | 679,285 |  |  |
Partnership units issued for acquisition |  |  | 7,111,112 |  |  |  |
Market price of shares on acquisition date |  | 11.54 |  |  |  |  |
Dividend rate |  | $ 0.60 |  |  |  |  |
Redemption price of partnership unit |  | Either for an amount, per unit, of cash equal to the market price of one of the Parent Company’s common share (based on the five-day trading average ending on the date of the exchange) or for one of the Parent Company’s common share |  |  |  |  |

X
- Definition Common Partnership Units Issued. + Details
Name: | bdn_CommonPartnershipUnitsIssued
Namespace Prefix: | bdn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Distribution Declared for common partnership unitholders. + Details
Name: | bdn_DistributionDeclaredForCommonPartnershipUnitholders
Namespace Prefix: | bdn
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Distribution Declared per common partnership unit. + Details
Name: | bdn_DistributionDeclaredPerCommonPartnershipUnit
Namespace Prefix: | bdn
Data Type: | us-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Distributions paid Preferred unitholders. + Details
Name: | bdn_DistributionsPaidPreferredUnitholders
Namespace Prefix: | bdn
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Dividend rate. + Details
Name: | bdn_DividendRate
Namespace Prefix: | bdn
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Market price of shares on acquisition date. + Details
Name: | bdn_MarketPriceOfSharesOnAcquisitionDate
Namespace Prefix: | bdn
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Partners Equity of The Operating Partnership. + Details
Name: | bdn_PartnersEquityOfOperatingPartnershipTextualsAbstract
Namespace Prefix: | bdn
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partnership units issued for acquisition. + Details
Name: | bdn_PartnershipUnitsIssuedForAcquisition
Namespace Prefix: | bdn
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferential return. + Details
Name: | bdn_PreferentialReturn
Namespace Prefix: | bdn
Data Type: | us-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferential return for series D. + Details
Name: | bdn_PreferentialReturnForSeriesD
Namespace Prefix: | bdn
Data Type: | us-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Redemption price of partnership unit. + Details
Name: | bdn_RedemptionPriceOfPartnershipUnit
Namespace Prefix: | bdn
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from parent as a source of financing that is recorded as additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 + Details
Name: | us-gaap_ProceedsFromContributionsFromParent
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration