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Consolidated Statements of Cash Flows (Parenthetical) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Supplemental disclosure: |  |  |
Capitalized interest | $ 1,997,000 | $ 10,385,000 | $ 8,893,000
Deferred gain debt |  |  | 12,900,000
BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Supplemental disclosure: |  |  |
Capitalized interest | 1,997,000 | 10,385,000 | 8,893,000
Deferred gain debt |  |  | $ 12,900,000

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