XML 34 R75.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2012 Reportable_Segments | Mar. 31, 2011 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | 7 |  |
Real estate investments, at cost: |  |  |
Operating properties | $ 4,717,124 |  | $ 4,793,080
Construction-in-progress | 38,442 |  | 25,083
Land inventory | 109,285 |  | 109,008
Total revenue | 141,801 | 144,298 |
Property operating expenses, real estate taxes and third party management expenses | 55,780 | 60,470 |
Net operating income | 86,021 | 83,828 |
Pennsylvania Suburbs [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 1,219,154 |  | 1,218,071
Total revenue | 39,829 | 40,053 |
Property operating expenses, real estate taxes and third party management expenses | 14,080 | 16,672 |
Net operating income | 25,749 | 23,381 |
Philadelphia CBD [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 954,484 |  | 953,870
Total revenue | 33,149 | 31,850 |
Property operating expenses, real estate taxes and third party management expenses | 12,686 | 12,219 |
Net operating income | 20,463 | 19,631 |
Metropolitan, D.C. [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 1,181,600 |  | 1,255,803
Total revenue | 26,437 | 30,332 |
Property operating expenses, real estate taxes and third party management expenses | 10,065 | 11,648 |
Net operating income | 16,372 | 18,684 |
New Jersey/ Delaware [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 543,293 |  | 545,657
Total revenue | 20,601 | 19,978 |
Property operating expenses, real estate taxes and third party management expenses | 9,737 | 11,088 |
Net operating income | 10,864 | 8,890 |
Richmond, Virginia [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 307,275 |  | 307,698
Total revenue | 9,034 | 8,798 |
Property operating expenses, real estate taxes and third party management expenses | 3,643 | 3,388 |
Net operating income | 5,391 | 5,410 |
Austin, Texas [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 257,397 |  | 257,694
Total revenue | 7,493 | 8,114 |
Property operating expenses, real estate taxes and third party management expenses | 3,396 | 3,093 |
Net operating income | 4,097 | 5,021 |
California [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 253,921 |  | 254,287
Total revenue | 5,636 | 5,409 |
Property operating expenses, real estate taxes and third party management expenses | 2,618 | 2,695 |
Net operating income | 3,018 | 2,714 |
Corporate [Member] |  |  |
Real estate investments, at cost: |  |  |
Operating properties | 0 |  | 0
Construction-in-progress | 38,442 |  | 25,083
Land inventory | 109,285 |  | 109,008
Total revenue | (378) | (236) |
Property operating expenses, real estate taxes and third party management expenses | (445) | (333) |
Net operating income | $ 67 | $ 97 |

X
- Definition Number of reportable segments + References No definition available. + Details
Name: | bdn_NumberOfReportableSegments
Namespace Prefix: | bdn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
Name: | us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_DevelopmentInProcess
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
Name: | us-gaap_GrossProfit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying amount of land available for development. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 1 -Subparagraph d Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_LandAvailableForDevelopment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents a total which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
Name: | us-gaap_RealEstateRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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