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Consolidated Statements of Partners' Equity - USD ($) $ in Thousands | Total | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interest [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. | BRANDYWINE OPERATING PARTNERSHIP, L.P. General Partner Capital [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. Accumulated Other Comprehensive Income (Loss) [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. Noncontrolling Interest [Member] | BRANDYWINE OPERATING PARTNERSHIP, L.P. Series E-linked Preferred Stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2016 |  |  |  | $ 1,859,642 | $ 1,762,764 | $ (2,122) | $ 2,150 | $ 96,850
Beginning Balance, Shares at Dec. 31, 2016 |  |  |  |  | 175,140,760 |  |  | 4,000,000
Net income | $ 21,271 |  | $ 169 | 21,271 | $ 21,266 |  | 5 |
Other comprehensive income | 1,300 | $ 1,288 | 12 | 1,300 |  | 1,300 |  |
Share Issuance from/(to) Deferred Compensation Plan | (48) |  |  | (48) | $ (48) |  |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  |  |  | 354 |  |  |
Issuance of LP Units |  |  |  | (219) | $ (219) |  |  |
Issuance of partnership interest in consolidated real estate venture | 29 |  | 29 | 29 |  |  | 29 |
Share Choice Plan Issuance, Shares |  |  |  |  | (1,423) |  |  |
Bonus share issuance | 110 |  |  | 110 | $ 110 |  |  |
Bonus share issuance, Shares |  |  |  |  | 6,752 |  |  |
Share-based compensation activity | 3,770 |  |  | 3,769 | $ 3,769 |  |  |
Share-based compensation activity, Shares |  |  |  |  | 56,669 |  |  |
Adjustment of redeemable partnership units to liquidation value at period end |  |  |  | (340) | $ (340) |  |  |
Preferred Share distributions | (1,725) |  |  | (1,725) | (1,725) |  |  |
Distributions to general partnership unitholders |  |  |  | (28,122) | (28,122) |  |  |
Ending Balance at Mar. 31, 2017 |  |  |  | 1,855,667 | $ 1,757,455 | (822) | 2,184 | $ 96,850
Ending Balance, Shares at Mar. 31, 2017 |  |  |  |  | 175,202,404 |  |  | 4,000,000
Beginning Balance at Dec. 31, 2017 |  |  |  | 1,819,682 | $ 1,815,411 | 2,056 | 2,215 |
Beginning Balance, Shares at Dec. 31, 2017 |  |  |  |  | 178,285,236 |  |  |
Net income | 44,705 |  | 376 | 44,705 | $ 44,700 |  | 5 |
Other comprehensive income | 5,008 | $ 4,966 | 42 | 5,008 |  | 5,008 |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  |  |  | (66,830) |  |  |
Issuance of LP Units |  |  |  | 416 | $ 416 |  |  |
Issuance of LP Units, Shares |  |  |  |  | 23,311 |  |  |
Issuance of partnership interest in consolidated real estate venture | 15 |  | 15 | 15 |  |  | 15 |
Distributions from consolidated real estate venture | (54) |  | $ (54) | (54) |  |  | (54) |
Share Choice Plan Issuance, Shares |  |  |  |  | (1,285) |  |  |
Share-based compensation activity | 3,076 |  |  | 3,075 | $ 3,075 |  |  |
Share-based compensation activity, Shares |  |  |  |  | 68,425 |  |  |
Adjustment of redeemable partnership units to liquidation value at period end |  |  |  | 3,604 | $ 3,604 |  |  |
Preferred Share distributions | $ 0 |  |  | 0 |  |  |  |
Distributions to general partnership unitholders |  |  |  | (32,259) | (32,259) |  |  |
Ending Balance at Mar. 31, 2018 |  |  |  | $ 1,844,192 | $ 1,834,947 | $ 7,064 | $ 2,181 |
Ending Balance, Shares at Mar. 31, 2018 |  |  |  |  | 178,442,517 |  |  |

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