Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Supplemental disclosure:
Capitalized interest	$ 859	$ 6,791
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Supplemental disclosure:
Capitalized interest	$ 859	$ 6,791

The amount of cash paid during the current period for interest owed on money borrowed that is not charged as an expense but rather is capitalized based on the long term nature of the use of the borrowed funds.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 29

Name:	us-gaap_CashPaidForCapitalizedInterest
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration