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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Cumulative Effect of Change in Accounting Principle | Common Shares | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Distributions in Excess of Accumulated Earnings | Distributions in Excess of Accumulated Earnings Cumulative Effect of Change in Accounting Principle | Total Common Shareholders' Equity | Total Common Shareholders' Equity Cumulative Effect of Change in Accounting Principle | Noncontrolling Interests | Noncontrolling Interests Cumulative Effect of Change in Accounting Principle
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2019 | $ 2,186,965 | $ (400) | $ 87 | $ 1,706,357 | $ (31,175) | $ (132,961) | $ (389) | $ 1,542,308 | $ (389) | $ 644,657 |  | $ (11)
Balance (in Shares) at Dec. 31, 2019 |  |  | 87,050 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  | 6,544 |  |  |  | 6,544 |  | (6,544) |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares) |  |  | 408 |  |  |  |  |  |  |  |  |
Repurchase of Common Shares | (22,386) |  | $ (1) | (22,385) |  |  |  | (22,386) |  |  |  |
Repurchase of Common Shares (in shares) |  |  | (1,219) |  |  |  |  |  |  |  |  |
Acquisition of Noncontroling Interest | 588 |  |  |  |  |  |  |  |  | 588 |  |
Dividends/distributions declared | (27,032) |  |  |  |  | (24,937) |  | (24,937) |  | (2,095) |  |
Employee and trustee stock compensation, net | 8,551 |  |  | 578 |  |  |  | 578 |  | 7,973 |  |
Employee and trustee stock compensation, net (in Shares) |  |  | 27 |  |  |  |  |  |  |  |  |
Noncontrolling interest distributions | (24,654) |  |  |  |  |  |  |  |  | (24,654) |  |
Noncontrolling interest contributions | 36,736 |  |  |  |  |  |  |  |  | 36,736 |  |
Comprehensive income (loss) | (106,268) |  |  |  | (54,698) | 1,966 |  | (52,732) |  | (53,536) |  |
Reallocation of noncontrolling interests |  |  |  | 4,244 |  |  |  | 4,244 |  | (4,244) | [1] |
Balance at Sep. 30, 2020 | 2,052,100 |  | $ 86 | 1,695,338 | (85,873) | (156,321) |  | 1,453,230 |  | 598,870 |  |
Balance (in Shares) at Sep. 30, 2020 |  |  | 86,266 |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2019 | 2,186,965 | $ (400) | $ 87 | 1,706,357 | (31,175) | (132,961) | $ (389) | 1,542,308 | $ (389) | 644,657 |  | $ (11)
Balance (in Shares) at Dec. 31, 2019 |  |  | 87,050 |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 2,048,553 |  | $ 86 | 1,683,165 | (74,891) | (167,046) |  | 1,441,314 |  | 607,239 |  |
Balance (in Shares) at Dec. 31, 2020 | 86,268,303 |  | 86,269 |  |  |  |  |  |  |  |  |
Balance at Jun. 30, 2020 | $ 2,093,331 |  | $ 86 | 1,693,006 | (90,209) | (147,291) |  | 1,455,592 |  | 637,739 |  |
Balance (in Shares) at Jun. 30, 2020 |  |  | 86,265 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Dividends/distributions declared | (123) |  |  |  |  |  |  |  |  | (123) |  |
Employee and trustee stock compensation, net | 2,413 |  |  | 232 |  |  |  | 232 |  | 2,181 |  |
Employee and trustee stock compensation, net (in Shares) |  |  | 1 |  |  |  |  |  |  |  |  |
Noncontrolling interest distributions | (20,117) |  |  |  |  |  |  |  |  | (20,117) |  |
Noncontrolling interest contributions | 8,427 |  |  |  |  |  |  |  |  | 8,427 |  |
Comprehensive income (loss) | (31,831) |  |  |  | 4,336 | (9,030) |  | (4,694) |  | (27,137) |  |
Reallocation of noncontrolling interests |  |  |  | 2,100 |  |  |  | 2,100 |  | (2,100) | [1] |
Balance at Sep. 30, 2020 | 2,052,100 |  | $ 86 | 1,695,338 | (85,873) | (156,321) |  | 1,453,230 |  | 598,870 |  |
Balance (in Shares) at Sep. 30, 2020 |  |  | 86,266 |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 2,048,553 |  | $ 86 | 1,683,165 | (74,891) | (167,046) |  | 1,441,314 |  | 607,239 |  |
Balance (in Shares) at Dec. 31, 2020 | 86,268,303 |  | 86,269 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | $ 0 |  | $ 0 | 697 | 0 | 0 |  | 697 |  | (697) |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares) |  |  | 44 |  |  |  |  |  |  |  |  |
Cancellation of OP Units | (479) |  |  |  |  |  |  |  |  | (479) |  |
Issuance of Common Shares | $ 45,865 |  | $ 2 | 45,863 | 0 | 0 |  | 45,865 |  | 0 |  |
Issuance of Common Shares (in Shares) |  |  | 2,085 |  |  |  |  |  |  |  |  |
Repurchase of Common Shares (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |
Dividends/distributions declared | $ (42,622) |  |  |  |  | (39,476) |  | (39,476) |  | (3,146) |  |
Employee and trustee stock compensation, net | 9,780 |  |  | 914 |  |  |  | 914 |  | 8,866 |  |
Employee and trustee stock compensation, net (in Shares) |  |  | 54 |  |  |  |  |  |  |  |  |
Noncontrolling interest distributions | (21,558) |  |  |  |  |  |  |  |  | (21,558) |  |
Noncontrolling interest contributions | 26,627 |  |  |  |  |  |  |  |  | 26,627 |  |
Comprehensive income (loss) | 75,345 |  |  |  | 31,722 | 21,149 |  | 52,871 |  | 22,474 |  |
Reallocation of noncontrolling interests |  |  |  | 2,809 |  |  |  | 2,809 |  | (2,809) | [1] |
Balance at Sep. 30, 2021 | $ 2,141,511 |  | $ 88 | 1,733,448 | (43,169) | (185,373) |  | 1,504,994 |  | 636,517 |  |
Balance (in Shares) at Sep. 30, 2021 | 88,451,668 |  | 88,452 |  |  |  |  |  |  |  |  |
Balance at Jun. 30, 2021 | $ 2,116,350 |  | $ 88 | 1,730,686 | (47,909) | (184,174) |  | 1,498,691 |  | 617,659 |  |
Balance (in Shares) at Jun. 30, 2021 |  |  | 88,419 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | 0 |  | $ 0 | 288 | 0 | 0 |  | 288 |  | (288) |  |
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares) |  |  | 18 |  |  |  |  |  |  |  |  |
Cancellation of OP Units | (479) |  |  |  |  |  |  |  |  | (479) |  |
Issuance of Common Shares | (189) |  |  | 189 |  |  |  | 189 |  |  |  |
Issuance of Common Shares (in Shares) |  |  | 13 |  |  |  |  |  |  |  |  |
Dividends/distributions declared | (14,314) |  |  |  |  | (13,268) |  | (13,268) |  | (1,046) |  |
Employee and trustee stock compensation, net | 2,644 |  |  | 225 |  |  |  | 225 |  | 2,419 |  |
Employee and trustee stock compensation, net (in Shares) |  |  | 2 |  |  |  |  |  |  |  |  |
Noncontrolling interest distributions | (10,527) |  |  |  |  |  |  |  |  | (10,527) |  |
Noncontrolling interest contributions | 9,518 |  |  |  |  |  |  |  |  | 9,518 |  |
Comprehensive income (loss) | 38,130 |  |  |  | 4,740 | 12,069 |  | 16,809 |  | 21,321 |  |
Reallocation of noncontrolling interests |  |  |  | 2,060 |  |  |  | 2,060 |  | (2,060) | [1] |
Balance at Sep. 30, 2021 | $ 2,141,511 |  | $ 88 | $ 1,733,448 | $ (43,169) | $ (185,373) |  | $ 1,504,994 |  | $ 636,517 |  |
Balance (in Shares) at Sep. 30, 2021 | 88,451,668 |  | 88,452 |  |  |  |  |  |  |  |  |
[1] | Adjustment reflects the difference between the fair value of the consideration received or paid and the book value of the Common Shares, Common OP Units, Preferred OP Units, and LTIP Units involving changes in ownership.

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