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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Total | PREFERRED SHARES | COMMON SHARES, $0.01 PAR VALUE | PAID IN CAPITAL | RETAINED EARNINGS | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | DISTRIBUTIONS | OPERATING PARTNERSHIP | PARTIALLY OWNED PROPERTIES
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2018 |  | $ 37,280 | $ 3,694 | $ 8,935,453 | $ 1,261,763 | $ (64,986) |  |  |
Balance, beginning of year at Dec. 31, 2018 |  |  |  |  |  |  |  | $ 228,738 | $ (2,293)
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 3 | 10,407 |  |  |  |  |
Exercise of share options |  |  | 17 | 77,768 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 3,115 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 2 | 12,436 |  |  |  | 2 |
Share options |  |  |  | 2,675 |  |  |  |  |
ESPP discount |  |  |  | 642 |  |  |  |  |
Offering costs |  |  |  | (991) |  |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (1,675) |  |  |  |  |
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership | $ 82,283 |  |  | (82,283) |  |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | 8,030 |  |  |  | (8,030) |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 3 | 10,407 |  |  |  |  |
Exercise of share options |  |  | 17 | 77,768 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 3,115 |  |  |  |  |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 970,377 |  |  |  | 970,377 |  |  |  |
Common Share distributions |  |  |  |  | (842,555) |  |  |  |
Preferred Share distributions |  |  |  |  | (3,090) |  |  |  |
Accumulated other comprehensive income (loss) - derivative instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | (33,765) |  |  |  |  | (33,765) |  |  |
Losses reclassified into earnings from other comprehensive income | (21,188) |  |  |  |  | 21,188 |  |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Common Share outstanding |  |  |  |  |  |  | $ 2.27 |  |
NONCONTROLLING INTERESTS |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 2 | 12,436 |  |  |  | 2 |
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner |  |  |  |  |  |  |  | (10,410) |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 13,410 |
Net income attributable to Noncontrolling Interests | 36,034 |  |  |  |  |  |  | 36,034 | 3,297
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (29,896) | (7,158)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership | 2,011 |  |  |  |  |  |  | (2,011) |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | 8,030 |  |  |  | (8,030) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 36,034 |  |  |  |  |  |  | 36,034 | 3,297
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 7,337
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (29,896) | (7,158)
Balance, end of year at Dec. 31, 2019 |  | 37,280 | 3,717 | 8,965,577 | 1,386,495 | (77,563) |  |  |
Balance, end of year at Dec. 31, 2019 |  |  |  |  |  |  |  | 227,837 | 1,183
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 1 | 4,695 |  |  |  |  |
Exercise of share options |  |  | 2 | 12,273 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 4,507 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 2 | 11,223 |  |  |  | 13 |
Share options |  |  |  | 2,349 |  |  |  |  |
ESPP discount |  |  |  | 944 |  |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (395) |  |  |  |  |
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership | (125,224) |  |  | 125,224 |  |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | 2,202 |  |  |  | (2,202) |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 1 | 4,695 |  |  |  |  |
Exercise of share options |  |  | 2 | 12,273 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 4,507 |  |  |  |  |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 913,636 |  |  |  | 913,636 |  |  |  |
Common Share distributions |  |  |  |  | (897,326) |  |  |  |
Preferred Share distributions |  |  |  |  | (3,090) |  |  |  |
Accumulated other comprehensive income (loss) - derivative instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | (1,190) |  |  |  |  | (1,190) |  |  |
Losses reclassified into earnings from other comprehensive income | (35,087) |  |  |  |  | 35,087 |  |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Common Share outstanding |  |  |  |  |  |  | 2.41 |  |
NONCONTROLLING INTERESTS |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 2 | 11,223 |  |  |  | 13 |
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner |  |  |  |  |  |  |  | (4,696) |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 11,926 |
Net income attributable to Noncontrolling Interests | 34,010 |  |  |  |  |  |  | 34,010 | 14,855
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (32,951) | (11,782)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership | 775 |  |  |  |  |  |  | (775) |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | 2,202 |  |  |  | (2,202) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 34,010 |  |  |  |  |  |  | 34,010 | 14,855
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 417
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (32,951) | (11,782)
Balance, end of year at Dec. 31, 2020 | 10,525,651 | 37,280 | 3,723 | 9,128,599 | 1,399,715 | (43,666) |  |  |
Balance, end of year at Dec. 31, 2020 | 237,835 |  |  |  |  |  |  | 233,162 | 4,673
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 13 | 74,050 |  |  |  |  |
Exercise of share options |  |  | 17 | 85,428 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 4,264 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 1 | 8,388 |  |  |  |  |
Share options |  |  |  | 3,101 |  |  |  |  |
ESPP discount |  |  |  | 991 |  |  |  |  |
Offering costs |  |  |  | (428) |  |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (1,335) |  |  |  |  |
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership | 158,598 |  |  | (158,598) |  |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | (23,338) |  |  |  | 23,338 |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  | 13 | 74,050 |  |  |  |  |
Exercise of share options |  |  | 17 | 85,428 |  |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  | 1 | 4,264 |  |  |  |  |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 1,332,850 |  |  |  | 1,332,850 |  |  |  |
Common Share distributions |  |  |  |  | (902,412) |  |  |  |
Preferred Share distributions |  |  |  |  | (3,090) |  |  |  |
Accumulated other comprehensive income (loss) - derivative instruments: |  |  |  |  |  |  |  |  |
Losses reclassified into earnings from other comprehensive income | (9,394) |  |  |  |  | 9,394 |  |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Common Share outstanding |  |  |  |  |  |  | $ 2.41 |  |
NONCONTROLLING INTERESTS |  |  |  |  |  |  |  |  |
Issuance of restricted units/shares |  |  | 1 | 8,388 |  |  |  |  |
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner |  |  |  |  |  |  |  | (74,063) |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 17,797 |
Net income attributable to Noncontrolling Interests | 45,900 |  |  |  |  |  |  | 45,900 | 17,964
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (30,612) | (5,865)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership | 1,428 |  |  |  |  |  |  | (1,428) |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  | (23,338) |  |  |  | 23,338 |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 45,900 |  |  |  |  |  |  | 45,900 | 17,964
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 1,394
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (30,612) | (5,865)
Balance, end of year at Dec. 31, 2021 | 10,954,948 | $ 37,280 | $ 3,755 | $ 9,121,122 | $ 1,827,063 | $ (34,272) |  |  |
Balance, end of year at Dec. 31, 2021 | $ 232,260 |  |  |  |  |  |  | $ 214,094 | $ 18,166

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