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Consolidated Statements of Beneficiaries' Equity - USD ($) | Total | Common Stock | Deferred Compensation Payable in Common Shares | Additional Paid-in Capital | Common Shares in Grantor Trust | Cumulative Earnings | Accumulated Other Comprehensive Income (Loss) | Cumulative Distributions | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 | $ 1,826,870,000 | $ 1,784,000 | $ 12,445,000 | $ 3,218,077,000 | $ (12,445,000) | $ 641,093,000 | $ 2,399,000 | $ (2,053,741,000) | $ 17,258,000
Beginning balance (in shares) at Dec. 31, 2017 |  | 178,285,236 | 894,736 |  |  |  |  |  |
Net income (loss) | 44,445,000 |  |  |  |  | 44,070,000 |  |  | 375,000
Other comprehensive income (loss) | 5,008,000 |  |  |  |  |  | 4,966,000 |  | 42,000
Issuance of Common Shares of Beneficial Interest | 416,000 |  |  | 416,000 |  |  |  |  |
Issuance of Common Shares of Beneficial Interest (in shares) |  | 23,311 |  |  |  |  |  |  |
Issuance of partnership interest in consolidated real estate ventures | 15,000 |  |  |  |  |  |  |  | 15,000
Distributions from consolidated real estate ventures | (54,000) |  |  |  |  |  |  |  | (54,000)
Share-based compensation activity | 3,076,000 | $ 1,000 |  | 3,072,000 |  | 3,000 |  |  |
Share-based compensation activity (in shares) |  | 68,425 |  |  |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  | $ 1,061,000 |  | (1,061,000) |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | 66,830 | 53,856 |  |  |  |  |  |
Share Choice Plan issuance (in shares) |  | (1,285) |  |  |  |  |  |  |
Reallocation of Noncontrolling interest | 0 |  |  | (5,000) |  |  |  |  | 5,000
Distributions declared | (32,525,000) |  |  |  |  |  |  | (32,259,000) | (266,000)
Ending balance at Mar. 31, 2018 | 1,847,251,000 | $ 1,785,000 | $ 13,506,000 | 3,221,560,000 | (13,506,000) | 685,166,000 | 7,365,000 | (2,086,000,000) | 17,375,000
Ending balance (in shares) at Mar. 31, 2018 |  | 178,442,517 | 948,592 |  |  |  |  |  |
Beginning balance at Dec. 31, 2017 | 1,826,870,000 | $ 1,784,000 | $ 12,445,000 | 3,218,077,000 | (12,445,000) | 641,093,000 | 2,399,000 | (2,053,741,000) | 17,258,000
Beginning balance (in shares) at Dec. 31, 2017 |  | 178,285,236 | 894,736 |  |  |  |  |  |
Net income (loss) | 13,799,000 |  |  |  |  |  |  |  |
Other comprehensive income (loss) | 7,906,000 |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2018 | 1,756,294,000 | $ 1,787,000 | $ 14,021,000 | 3,223,318,000 | (14,021,000) | 654,744,000 | 10,239,000 | (2,150,463,000) | 16,669,000
Ending balance (in shares) at Sep. 30, 2018 |  | 178,602,602 | 977,120 |  |  |  |  |  |
Beginning balance at Mar. 31, 2018 | 1,847,251,000 | $ 1,785,000 | $ 13,506,000 | 3,221,560,000 | (13,506,000) | 685,166,000 | 7,365,000 | (2,086,000,000) | 17,375,000
Beginning balance (in shares) at Mar. 31, 2018 |  | 178,442,517 | 948,592 |  |  |  |  |  |
Net income (loss) | 12,876,000 |  |  |  |  | 12,747,000 |  |  | 129,000
Other comprehensive income (loss) | 1,871,000 |  |  |  |  |  | 1,856,000 |  | 15,000
Issuance of partnership interest in consolidated real estate ventures | (4,000) |  |  |  |  |  |  |  | (4,000)
Share-based compensation activity | 1,139,000 | $ 1,000 |  | 1,135,000 |  | 3,000 |  |  |
Share-based compensation activity (in shares) |  | 127,726 |  |  |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | (111,000) | $ 1,000 | $ 530,000 | (112,000) | (530,000) |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | 34,230 | 33,713 |  |  |  |  |  |
Reallocation of Noncontrolling interest | 0 |  |  | 2,000 |  |  |  |  | (2,000)
Distributions declared | (32,497,000) |  |  |  |  |  |  | (32,230,000) | (267,000)
Ending balance at Jun. 30, 2018 | 1,830,525,000 | $ 1,787,000 | $ 14,036,000 | 3,222,585,000 | (14,036,000) | 697,916,000 | 9,221,000 | (2,118,230,000) | 17,246,000
Ending balance (in shares) at Jun. 30, 2018 |  | 178,604,473 | 982,305 |  |  |  |  |  |
Net income (loss) | (43,522,000) |  |  |  |  | (43,180,000) |  |  | (342,000)
Other comprehensive income (loss) | 1,027,000 |  |  |  |  |  | 1,018,000 |  | 9,000
Issuance of partnership interest in consolidated real estate ventures | 5,000 |  |  |  |  |  |  |  | 5,000
Share-based compensation activity | 758,000 |  |  | 750,000 |  | 8,000 |  |  |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  | $ (15,000) |  | 15,000 |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | (1,871) | (5,185) |  |  |  |  |  |
Reallocation of Noncontrolling interest | 0 |  |  | (17,000) |  |  |  |  | 17,000
Distributions declared | (32,499,000) |  |  |  |  |  |  | (32,233,000) | (266,000)
Ending balance at Sep. 30, 2018 | 1,756,294,000 | $ 1,787,000 | $ 14,021,000 | 3,223,318,000 | (14,021,000) | 654,744,000 | 10,239,000 | (2,150,463,000) | 16,669,000
Ending balance (in shares) at Sep. 30, 2018 |  | 178,602,602 | 977,120 |  |  |  |  |  |
Beginning balance at Dec. 31, 2018 | 1,811,028,000 | $ 1,770,000 | $ 14,021,000 | 3,200,312,000 | (14,021,000) | 775,625,000 | 5,029,000 | (2,183,909,000) | 12,201,000
Beginning balance (in shares) at Dec. 31, 2018 |  | 176,873,324 | 977,120 |  |  |  |  |  |
Net income (loss) | 4,583,000 |  |  |  |  | 4,523,000 |  |  | 60,000
Other comprehensive income (loss) | (2,483,000) |  |  |  |  |  | (2,469,000) |  | (14,000)
Repurchase and retirement of Common Shares of Beneficial Interest | (17,281,000) | $ (13,000) |  | (17,268,000) |  |  |  |  |
Repurchase and retirement of Common Shares of Beneficial Interest (in shares) |  | (1,337,169) |  |  |  |  |  |  |
Issuance of partnership interest in consolidated real estate ventures | 22,000 |  |  |  |  |  |  |  | 22,000
Share-based compensation activity | 3,677,000 | $ 4,000 |  | 3,673,000 |  |  |  |  |
Share-based compensation activity (in shares) |  | 465,883 | 41,342 |  |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  | $ 619,000 |  | (619,000) |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | (458) | (5,920) |  |  |  |  |  |
Reallocation of Noncontrolling interest | 0 |  |  | 57,000 |  |  |  |  | (57,000)
Distributions declared | (33,747,000) |  |  |  |  |  |  | (33,560,000) | (187,000)
Ending balance at Mar. 31, 2019 | 1,760,463,000 | $ 1,761,000 | $ 14,640,000 | 3,186,774,000 | (14,640,000) | 774,812,000 | 2,560,000 | (2,217,469,000) | 12,025,000
Ending balance (in shares) at Mar. 31, 2019 |  | 176,001,580 | 1,012,542 |  |  |  |  |  |
Beginning balance at Dec. 31, 2018 | 1,811,028,000 | $ 1,770,000 | $ 14,021,000 | 3,200,312,000 | (14,021,000) | 775,625,000 | 5,029,000 | (2,183,909,000) | 12,201,000
Beginning balance (in shares) at Dec. 31, 2018 |  | 176,873,324 | 977,120 |  |  |  |  |  |
Net income (loss) | 17,655,000 |  |  |  |  |  |  |  |
Other comprehensive income (loss) | (8,627,000) |  |  |  |  |  |  |  |
Repurchase and retirement of Common Shares of Beneficial Interest | $ (17,300,000) |  |  |  |  |  |  |  |
Repurchase and retirement of Common Shares of Beneficial Interest (in shares) | (1,337,169) |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2019 | $ 1,702,437,000 | $ 1,763,000 | $ 16,216,000 | 3,189,350,000 | (16,216,000) | 787,789,000 | (3,550,000) | (2,284,610,000) | 11,695,000
Ending balance (in shares) at Sep. 30, 2019 |  | 176,194,918 | 1,105,542 |  |  |  |  |  |
Beginning balance at Mar. 31, 2019 | 1,760,463,000 | $ 1,761,000 | $ 14,640,000 | 3,186,774,000 | (14,640,000) | 774,812,000 | 2,560,000 | (2,217,469,000) | 12,025,000
Beginning balance (in shares) at Mar. 31, 2019 |  | 176,001,580 | 1,012,542 |  |  |  |  |  |
Net income (loss) | 6,252,000 |  |  |  |  | 6,205,000 |  |  | 47,000
Other comprehensive income (loss) | (4,746,000) |  |  |  |  |  | (4,720,000) |  | (26,000)
Issuance of partnership interest in consolidated real estate ventures | 3,000 |  |  |  |  |  |  |  | 3,000
Redemption of LP Units | 0 |  |  | 16,000 |  |  |  |  | (16,000)
Redemption of LP Units (in shares) |  | 1,245 |  |  |  |  |  |  |
Share-based compensation activity | 1,451,000 | $ 2,000 |  | 1,449,000 |  |  |  |  |
Share-based compensation activity (in shares) |  | 94,150 |  |  |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  | $ 1,599,000 |  | (1,599,000) |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | 100,908 | 100,908 |  |  |  |  |  |
Distributions declared | (33,758,000) |  |  |  |  |  |  | (33,571,000) | (187,000)
Ending balance at Jun. 30, 2019 | 1,729,665,000 | $ 1,763,000 | $ 16,239,000 | 3,188,239,000 | (16,239,000) | 781,017,000 | (2,160,000) | (2,251,040,000) | 11,846,000
Ending balance (in shares) at Jun. 30, 2019 |  | 176,197,883 | 1,113,450 |  |  |  |  |  |
Net income (loss) | 6,820,000 |  |  |  |  | 6,772,000 |  |  | 48,000
Other comprehensive income (loss) | (1,398,000) |  |  |  |  |  | (1,390,000) |  | (8,000)
Repurchase and retirement of Common Shares of Beneficial Interest | 0 |  |  |  |  |  |  |  |
Issuance of partnership interest in consolidated real estate ventures | 2,000 |  |  |  |  |  |  |  | 2,000
Share-based compensation activity | 1,105,000 |  |  | 1,105,000 |  |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan | 0 |  | $ (23,000) |  | 23,000 |  |  |  |
Share Issuance from/(to) Deferred Compensation Plan (in shares) |  | (2,965) | (7,908) |  |  |  |  |  |
Reallocation of Noncontrolling interest | 0 |  |  | 6,000 |  |  |  |  | (6,000)
Distributions declared | (33,757,000) |  |  |  |  |  |  | (33,570,000) | (187,000)
Ending balance at Sep. 30, 2019 | $ 1,702,437,000 | $ 1,763,000 | $ 16,216,000 | $ 3,189,350,000 | $ (16,216,000) | $ 787,789,000 | $ (3,550,000) | $ (2,284,610,000) | $ 11,695,000
Ending balance (in shares) at Sep. 30, 2019 |  | 176,194,918 | 1,105,542 |  |  |  |  |  |

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