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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | Brandywine Realty Trust and Brandywine Operating Partnership, L.P. Schedule II Valuation and Qualifying Accounts (in thousands)
Description |  | Balance at Beginning of Period |  | Additions |  | Deductions (1) |  | Balance at End of Period
Allowance for doubtful accounts: |  |  |  |  |  |  |  |
Year ended December 31, 2011 |  | $ | 15,222 |  |  | $ | 928 |  |  | $ | 665 |  |  | $ | 15,485 |
Year ended December 31, 2010 |  | $ | 16,363 |  |  | $ | 763 |  |  | $ | 1,904 |  |  | $ | 15,222 |
Year ended December 31, 2009 |  | $ | 15,474 |  |  | $ | 2,596 |  |  | $ | 1,707 |  |  | $ | 16,363 |
(1) | Deductions represent amounts that the Company had fully reserved for in prior periods and pursuit of collection of such amounts was ceased during the period.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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