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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]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 |  |  |  | $ 1,799,955 | $ 1,795,684 | $ 2,056 | $ 2,215
Beginning Balance, Shares at Dec. 31, 2017 |  |  |  |  | 178,285,236 |  |
Net income | $ 44,445 |  | $ 375 | 44,445 | $ 44,440 |  | 5
Other comprehensive income (loss) | 5,008 | $ 4,966 | 42 | 5,008 |  | 5,008 |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  |  | 0 |  |  |
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 ventures | 15 |  | 15 | 15 |  |  | 15
Distributions from consolidated real estate ventures | $ (54) |  | (54) | $ (54) |  |  | (54)
Share Choice Plan issuance | 0 |  |  | 0 | (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 |  |
Distributions declared to general partnership unitholders |  |  |  | (32,259) | (32,259) |  |
Ending Balance at Mar. 31, 2018 |  |  |  | 1,824,205 | $ 1,814,960 | 7,064 | 2,181
Ending Balance, Shares at Mar. 31, 2018 |  |  |  |  | 178,442,517 |  |
Beginning Balance at Dec. 31, 2017 |  |  |  | 1,799,955 | $ 1,795,684 | 2,056 | 2,215
Beginning Balance, Shares at Dec. 31, 2017 |  |  |  |  | 178,285,236 |  |
Net income | 57,321 |  |  | 57,321 |  |  |
Other comprehensive income (loss) | 6,879 |  |  | 6,879 |  |  |
Ending Balance at Jun. 30, 2018 |  |  |  | 1,805,756 | $ 1,794,623 | 8,935 | 2,198
Ending Balance, Shares at Jun. 30, 2018 |  |  |  |  | 178,604,473 |  |
Beginning Balance at Mar. 31, 2018 |  |  |  | 1,824,205 | $ 1,814,960 | 7,064 | 2,181
Beginning Balance, Shares at Mar. 31, 2018 |  |  |  |  | 178,442,517 |  |
Net income | 12,876 |  | 129 | 12,876 | $ 12,855 |  | 21
Other comprehensive income (loss) | 1,871 | 1,856 | 15 | 1,871 |  | 1,871 |
Share Issuance from/(to) Deferred Compensation Plan | (111) |  |  | (111) | $ (111) |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  |  |  | 34,230 |  |
Issuance of partnership interest in consolidated real estate ventures | (4) |  | (4) | (4) |  |  | (4)
Share-based compensation activity | 1,139 |  |  | 1,140 | $ 1,140 |  |
Share-based compensation activity, Shares |  |  |  |  | 127,726 |  |
Adjustment of redeemable partnership units to liquidation value at period end |  |  |  | (1,991) | $ (1,991) |  |
Distributions declared to general partnership unitholders |  |  |  | (32,230) | (32,230) |  |
Ending Balance at Jun. 30, 2018 |  |  |  | 1,805,756 | $ 1,794,623 | 8,935 | 2,198
Ending Balance, Shares at Jun. 30, 2018 |  |  |  |  | 178,604,473 |  |
Beginning Balance at Dec. 31, 2018 |  |  |  | 1,798,508 | $ 1,791,591 | 4,725 | 2,192
Beginning Balance, Shares at Dec. 31, 2018 |  |  |  |  | 176,873,324 |  |
Cumulative effect of accounting change | (5,336) |  |  | (5,336) | $ (5,336) |  |
Net income | 4,583 |  | 60 | 4,583 | $ 4,549 |  | 34
Other comprehensive income (loss) | (2,483) | (2,469) | (14) | (2,483) |  | (2,483) |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  |  | 0 |  |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  |  |  | (458) |  |
Repurchase and retirement of LP units |  |  |  | (17,281) | $ (17,281) |  |
Repurchase and retirement of LP units, Shares |  |  |  |  | (1,337,169) |  |
Issuance of partnership interest in consolidated real estate ventures | 22 |  | 22 | 22 |  |  | 22
Share-based compensation activity | 3,677 |  |  | 3,677 | $ 3,677 |  |
Share-based compensation activity, Shares |  |  |  |  | 465,883 |  |
Adjustment of redeemable partnership units to liquidation value at period end |  |  |  | (3,088) | $ (3,088) |  |
Distributions declared to general partnership unitholders |  |  |  | (33,560) | (33,560) |  |
Ending Balance at Mar. 31, 2019 |  |  |  | 1,745,042 | $ 1,740,552 | 2,242 | 2,248
Ending Balance, Shares at Mar. 31, 2019 |  |  |  |  | 176,001,580 |  |
Beginning Balance at Dec. 31, 2018 |  |  |  | 1,798,508 | $ 1,791,591 | 4,725 | 2,192
Beginning Balance, Shares at Dec. 31, 2018 |  |  |  |  | 176,873,324 |  |
Net income | 10,835 |  |  | 10,835 |  |  |
Other comprehensive income (loss) | (7,229) |  |  | (7,229) |  |  |
Ending Balance at Jun. 30, 2019 |  |  |  | 1,715,445 | $ 1,715,685 | (2,504) | 2,264
Ending Balance, Shares at Jun. 30, 2019 |  |  |  |  | 176,197,883 |  |
Beginning Balance at Mar. 31, 2019 |  |  |  | 1,745,042 | $ 1,740,552 | 2,242 | 2,248
Beginning Balance, Shares at Mar. 31, 2019 |  |  |  |  | 176,001,580 |  |
Net income | 6,252 |  | 47 | 6,252 | $ 6,239 |  | 13
Other comprehensive income (loss) | (4,746) | $ (4,720) | (26) | (4,746) |  | (4,746) |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  |  | 0 |  |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  |  |  | 100,908 |  |
Repurchase and retirement of LP units |  |  |  | 0 |  |  |
Repurchase and retirement of LP units, Shares |  |  |  |  | 1,245 |  |
Issuance of partnership interest in consolidated real estate ventures | 3 |  | $ 3 | 3 |  |  | 3
Share-based compensation activity | $ 1,451 |  |  | 1,451 | $ 1,451 |  |
Share-based compensation activity, Shares |  |  |  |  | 94,150 |  |
Adjustment of redeemable partnership units to liquidation value at period end |  |  |  | 1,014 | $ 1,014 |  |
Distributions declared to general partnership unitholders |  |  |  | (33,571) | (33,571) |  |
Ending Balance at Jun. 30, 2019 |  |  |  | $ 1,715,445 | $ 1,715,685 | $ (2,504) | $ 2,264
Ending Balance, Shares at Jun. 30, 2019 |  |  |  |  | 176,197,883 |  |

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