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Consolidated Statements of Partners' Equity - USD ($) $ in Thousands | Total | BRANDYWINE OPERATING PARTNERSHIP, L.P. | General Partner Capital [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P. | Series E-linked Preferred Stock [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P. | Accumulated Other Comprehensive Loss [Member] | Accumulated Other Comprehensive Loss [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P. | Noncontrolling Interest [Member] | Noncontrolling Interest [Member] BRANDYWINE OPERATING PARTNERSHIP, L.P.
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2015 |  | $ 1,929,977 | $ 1,836,692 | $ 96,850 |  | $ (5,597) |  | $ 2,032
Beginning Balance, Shares at Dec. 31, 2015 |  |  | 174,688,568 | 4,000,000 |  |  |  |
Net income | $ 52,871 | 52,871 | $ 52,859 |  |  |  | $ 425 | 12
Other comprehensive income (loss) | (9,946) | (9,946) |  |  | $ (9,860) | (9,946) | (86) |
Share Issuance from/(to) Deferred Compensation Plan | (47) | (47) | $ (47) |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  | (8,311) |  |  |  |  |
Issuance of partnership interest in consolidated real estate venture | 73 | 73 |  |  |  |  | 73 | 73
Conversion of LP Units to Common Shares |  | 875 | $ 875 |  |  |  | (875) |
Conversion of LP Units to Common Shares, Shares |  |  | 55,303 |  |  |  |  |
Share-based compensation activity | 4,934 | 4,929 | $ 4,929 |  |  |  |  |
Share-based compensation activity, Shares |  |  | 405,200 |  |  |  |  |
Adjustment of redeemable partnership units to liquidation value at period end |  | (1,935) | $ (1,935) |  |  |  |  |
Redemption value of limited partnership units |  | (875) | (875) |  |  |  |  |
Distribution to preferred shareholders | (5,175) | (5,175) | (5,175) |  |  |  |  |
Preferred Mirror Units redemption charge | 0 | 0 |  |  |  |  |  |
Distributions to general partnership unitholders |  | (82,524) | (82,524) |  |  |  |  |
Ending Balance at Sep. 30, 2016 |  | 1,888,223 | $ 1,804,799 | $ 96,850 |  | (15,543) |  | 2,117
Ending Balance, Shares at Sep. 30, 2016 |  |  | 175,140,760 | 4,000,000 |  |  |  |
Beginning Balance at Dec. 31, 2016 |  | 1,859,642 | $ 1,762,764 | $ 96,850 |  | (2,122) |  | 2,150
Beginning Balance, Shares at Dec. 31, 2016 |  |  | 175,140,760 | 4,000,000 |  |  |  |
Net income | 48,015 | 48,015 | $ 47,990 |  |  |  | 384 | 25
Other comprehensive income (loss) | 846 | 846 |  |  | $ 839 | 846 | 7 |
Redemption of Preferred Mirror Units |  | (96,850) |  | $ (96,850) |  |  |  |
Redemption of Preferred Mirror Units, Shares |  |  |  | (4,000,000) |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | (48) | (48) | $ (48) |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan, Shares |  |  | (1,718) |  |  |  |  |
Issuance of LP Units |  | (499) | $ (499) |  |  |  |  |
Issuance of partnership interest in consolidated real estate venture | 85 | 86 |  |  |  |  | 85 | 86
Distributions from consolidated real estate venture | (46) | (46) |  |  |  |  | $ (46) | (46)
Share Choice Plan Issuance, Shares |  |  | (1,423) |  |  |  |  |
Bonus share issuance | 110 | 110 | $ 110 |  |  |  |  |
Bonus share issuance, Shares |  |  | 6,752 |  |  |  |  |
Share-based compensation activity | 5,907 | 5,907 | $ 5,907 |  |  |  |  |
Share-based compensation activity, Shares |  |  | 333,127 |  |  |  |  |
Adjustment of redeemable partnership units to liquidation value at period end |  | (2,781) | $ (2,781) |  |  |  |  |
Distribution to preferred shareholders | (2,032) | (2,032) | (2,032) |  |  |  |  |
Preferred Mirror Units redemption charge | $ (3,181) | (3,181) | (3,181) |  |  |  |  |
Distributions to general partnership unitholders |  | (84,463) | (84,463) |  |  |  |  |
Ending Balance at Sep. 30, 2017 |  | $ 1,724,706 | $ 1,723,767 |  |  | $ (1,276) |  | $ 2,215
Ending Balance, Shares at Sep. 30, 2017 |  |  | 175,477,498 |  |  |  |  |

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