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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2018
Valuation And Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure | 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, 2018 |  | $ | 17,112 |  |  | $ | 1,775 |  |  | $ | 5,968 |  |  | $ | 12,919 |
Year-ended December 31, 2017 |  | $ | 16,116 |  |  | $ | 1,912 |  |  | $ | 916 |  |  | $ | 17,112 |
Year-ended December 31, 2016 |  | $ | 16,178 |  |  | $ | 2,207 |  |  | $ | 2,269 |  |  | $ | 16,116 |
(1) | Deductions represent amounts that the Company had fully reserved for in prior years and for which the pursuit of collection of such amounts was ceased during the year.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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