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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items] |
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | Brandywine Realty Trust and Brandywine Operating Partnership, L.P. Schedule II Valuation and Qualifying Accounts (in thousands)
Description |  | Balance at Beginning of Year |  | Additions |  | Deductions (1) |  | Balance at End of Year
Allowance for doubtful accounts: |  |  |  |  |  |  |  |
Year-ended December 31, 2014 |  | $ | 16,248 |  |  | $ | 790 |  |  | $ | 1,691 |  |  | $ | 15,347 |
Year-ended December 31, 2013 |  | $ | 16,646 |  |  | $ | 1,384 |  |  | $ | 1,782 |  |  | $ | 16,248 |
Year-ended December 31, 2012 |  | $ | 15,485 |  |  | $ | 1,891 |  |  | $ | 730 |  |  | $ | 16,646 |
(1) | Deductions represent amounts that the Company had fully reserved for in prior years and pursuit of collection of such amounts was ceased during the year.

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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 FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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