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Partners Equity of the Operating Partnership (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 24, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Class of Stock [Line Items] |  |  |  |  |  |
Dividends, Common Stock | $ 28,200 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 6.90% |  | 6.90%
Dividends, Preferred Stock |  | $ 1,725 | $ 1,725 | $ 3,450 | $ 3,450 |
BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividends, Common Stock | $ 28,200 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 6.90% |  | 6.90%
Dividends, Preferred Stock |  | $ 1,725 | $ 1,725 | $ 3,450 | $ 3,450 |
Dividend Declared [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividends Payable, Amount Per Share | $ 0.16 |  |  |  |  |
Dividend Declared [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividends Payable, Amount Per Share | $ 0.16 |  |  |  |  |
6.90% Series E-linked Preferred Units [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 6.90% |  |
Preferred Stock, Liquidation Preference Per Share |  | $ 25.00 |  | $ 25.00 |  |
Dividends, Preferred Stock | $ 1,700 |  |  |  |  |

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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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