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CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands | Total | Series K Preferred Stock [Member] | PREFERRED SHARES | COMMON SHARES, $0.01 PAR VALUE | PAID IN CAPITAL | RETAINED EARNINGS | ACCUMULATED OTHER COMPREHENSIVE (LOSS) | OPERATING PARTNERSHIP | PARTIALLY OWNED PROPERTIES
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2012 |  |  | $ 50,000 | $ 3,251 | $ 6,542,355 | $ 887,355 | $ (193,148) |  |
Balance, beginning of year at Dec. 31, 2012 |  |  |  |  |  |  |  | $ 159,606 | $ 77,688
PREFERRED SHARES |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  | 0 |  |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  |  |  |  |  |  |
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 1 | 1,698 |  |  | (1,699) |
Issuance of Common Shares |  |  |  | 345 | 1,929,523 |  |  |  |
Exercise of share options |  |  |  | 5 | 17,247 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 1 | 3,400 |  |  |  |
Restricted shares |  |  |  | 2 | 13,262 |  |  |  |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 1 | 1,698 |  |  | (1,699) |
Issuance of Common Shares |  |  |  | 345 | 1,929,523 |  |  |  |
Exercise of share options |  |  |  | 5 | 17,247 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 1 | 3,400 |  |  |  |
Conversion of restricted shares to restricted units |  |  |  |  | 0 |  |  | 0 |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Restricted shares |  |  |  | 2 | 13,262 |  |  |  |
Share options |  |  |  |  | 10,514 |  |  |  |
ESPP discount |  |  |  |  | 632 |  |  |  |
Common Shares repurchsed and retired |  |  |  |  | 0 |  |  |  |
Offering costs |  |  |  |  | (1,047) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | (422) |  |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | 0 |  |  |  | 0
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership | $ (79,667) |  |  |  | 79,667 |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | (35,329) |  |  | 35,329 |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 1,830,613 |  |  |  |  | 1,830,613 |  |  |
Common Share distributions |  |  |  |  |  | (666,565) |  |  |
Preferred Share distributions |  |  |  |  |  | (4,145) |  |  |
Premium on redemption of Preferred Shares – cash charge |  |  |  |  |  | 0 |  |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | 18,771 |  |  |  |  |  | 18,771 |  |
Losses reclassified into earnings from other comprehensive income | (20,141) |  |  |  |  |  | 20,141 |  |
Accumulated other comprehensive income (loss) – other instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the year | 583 |  |  |  |  |  | 583 |  |
(Gains) realized during the year |  |  |  |  |  |  | (2,122) |  |
Currency translation adjustments arising during the year | 613 |  |  |  |  |  | 613 |  |
OPERATING PARTNERSHIP |  |  |  |  |  |  |  |  |
Issuance of restricted units to Noncontrolling Interests |  |  |  |  |  |  |  | 5 |
Conversion of OP Units into Common Shares |  |  |  | 1 | 1,698 |  |  | (1,699) |
Conversion of restricted shares to restricted units |  |  |  |  | 0 |  |  | 0 |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 13,609 |
Net income (loss) attributable to Noncontrolling Interests | 1,905,353 |  |  |  |  |  |  | 75,278 | (538)
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (26,277) | (6,490)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership | 44,439 |  |  |  |  |  |  | (44,439) |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | (35,329) |  |  | 35,329 |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income (loss) attributable to Noncontrolling Interests | 1,905,353 |  |  |  |  |  |  | 75,278 | (538)
Contributions – Noncontrolling Interests – Partially Owned Properties | 27,660 |  |  |  |  |  |  |  | 27,660
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (26,277) | (6,490)
Acquisition of Archstone |  |  |  |  |  |  |  |  | 28,263
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | 0 |  |  |  | 0
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  | 0
Other |  |  |  |  |  |  |  |  | 0
Balance, end of year at Dec. 31, 2013 |  |  | 50,000 | 3,605 | 8,561,500 | 2,047,258 | (155,162) |  |
Balance, end of year at Dec. 31, 2013 |  |  |  |  |  |  |  | 211,412 | 126,583
PREFERRED SHARES |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  | 0 |  |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  |  |  |  |  |  |
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 1 | 2,364 |  |  | (2,365) |
Issuance of Common Shares |  |  |  | 0 | 0 |  |  |  |
Exercise of share options |  |  |  | 21 | 82,552 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 0 | 3,392 |  |  |  |
Restricted shares |  |  |  | 2 | 9,902 |  |  |  |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 1 | 2,364 |  |  | (2,365) |
Issuance of Common Shares |  |  |  | 0 | 0 |  |  |  |
Exercise of share options |  |  |  | 21 | 82,552 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 0 | 3,392 |  |  |  |
Conversion of restricted shares to restricted units |  |  |  |  | 0 |  |  | 0 |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Restricted shares |  |  |  | 2 | 9,902 |  |  |  |
Share options |  |  |  |  | 7,349 |  |  |  |
ESPP discount |  |  |  |  | 859 |  |  |  |
Common Shares repurchsed and retired |  |  |  |  | (1,777) |  |  |  |
Offering costs |  |  |  |  | (41) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | 7,374 |  |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | (2,308) |  |  |  | (2,244)
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership | 139,818 |  |  |  | (139,818) |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | 4,992 |  |  | (4,992) |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 631,308 |  |  |  |  | 631,308 |  |  |
Common Share distributions |  |  |  |  |  | (723,782) |  |  |
Preferred Share distributions |  |  |  |  |  | (4,145) |  |  |
Premium on redemption of Preferred Shares – cash charge |  |  |  |  |  | 0 |  |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | (33,306) |  |  |  |  |  | (33,306) |  |
Losses reclassified into earnings from other comprehensive income | (16,868) |  |  |  |  |  | 16,868 |  |
Accumulated other comprehensive income (loss) – other instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the year | 0 |  |  |  |  |  | 0 |  |
(Gains) realized during the year |  |  |  |  |  |  | 0 |  |
Currency translation adjustments arising during the year | (552) |  |  |  |  |  | (552) |  |
OPERATING PARTNERSHIP |  |  |  |  |  |  |  |  |
Issuance of restricted units to Noncontrolling Interests |  |  |  |  |  |  |  | 3 |
Conversion of OP Units into Common Shares |  |  |  | 1 | 2,364 |  |  | (2,365) |
Conversion of restricted shares to restricted units |  |  |  |  | 0 |  |  | 0 |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 11,969 |
Net income (loss) attributable to Noncontrolling Interests | 658,683 |  |  |  |  |  |  | 24,831 | 2,544
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (28,676) | (7,827)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership | (2,229) |  |  |  |  |  |  | 2,229 |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | 4,992 |  |  | (4,992) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income (loss) attributable to Noncontrolling Interests | 658,683 |  |  |  |  |  |  | 24,831 | 2,544
Contributions – Noncontrolling Interests – Partially Owned Properties | 5,684 |  |  |  |  |  |  |  | 5,684
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (28,676) | (7,827)
Acquisition of Archstone |  |  |  |  |  |  |  |  | 0
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | (2,308) |  |  |  | (2,244)
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  | 0
Other |  |  |  |  |  |  |  |  | 169
Balance, end of year at Dec. 31, 2014 | 10,368,456 |  | 50,000 | 3,629 | 8,536,340 | 1,950,639 | (172,152) |  |
Balance, end of year at Dec. 31, 2014 | 10,707,776 |  |  |  |  |  |  | 214,411 | 124,909
PREFERRED SHARES |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  | (12,720) |  |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  |  |  |  |  |  |
COMMON SHARES, $0.01 PAR VALUE |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 2 | 4,964 |  |  | (4,966) |
Issuance of Common Shares |  |  |  | 0 | 0 |  |  |  |
Exercise of share options |  |  |  | 14 | 59,494 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 1 | 4,403 |  |  |  |
Restricted shares |  |  |  | 2 | 15,064 |  |  |  |
PAID IN CAPITAL |  |  |  |  |  |  |  |  |
Conversion of OP Units into Common Shares |  |  |  | 2 | 4,964 |  |  | (4,966) |
Issuance of Common Shares |  |  |  | 0 | 0 |  |  |  |
Exercise of share options |  |  |  | 14 | 59,494 |  |  |  |
Employee Share Purchase Plan (ESPP) |  |  |  | 1 | 4,403 |  |  |  |
Conversion of restricted shares to restricted units |  |  |  |  | (70) |  |  | 70 |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
Restricted shares |  |  |  | 2 | 15,064 |  |  |  |
Share options |  |  |  |  | 3,756 |  |  |  |
ESPP discount |  |  |  |  | 884 |  |  |  |
Common Shares repurchsed and retired |  |  |  |  | 0 |  |  |  |
Offering costs |  |  |  |  | (79) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | 1,380 |  |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | 0 |  |  |  | 0
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership | 64,378 |  |  |  | (64,378) |  |  |  |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | 10,607 |  |  | (10,607) |
RETAINED EARNINGS |  |  |  |  |  |  |  |  |
Net income attributable to controlling interests | 870,120 |  |  |  |  | 870,120 |  |  |
Common Share distributions |  |  |  |  |  | (804,825) |  |  |
Preferred Share distributions |  |  |  |  |  | (3,357) |  |  |
Premium on redemption of Preferred Shares – cash charge |  |  |  |  |  | (3,486) |  |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | 2,219 |  |  |  |  |  | 2,219 |  |
Losses reclassified into earnings from other comprehensive income | (18,244) |  |  |  |  |  | 18,244 |  |
Accumulated other comprehensive income (loss) – other instruments: |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the year | 0 |  |  |  |  |  | 0 |  |
(Gains) realized during the year |  |  |  |  |  |  | 0 |  |
Currency translation adjustments arising during the year | (327) |  |  |  |  |  | (327) |  |
OPERATING PARTNERSHIP |  |  |  |  |  |  |  |  |
Issuance of restricted units to Noncontrolling Interests |  |  |  |  |  |  |  | 3 |
Conversion of OP Units into Common Shares |  |  |  | 2 | 4,964 |  |  | (4,966) |
Conversion of restricted shares to restricted units |  |  |  |  | (70) |  |  | 70 |
Equity compensation associated with Noncontrolling Interests |  |  |  |  |  |  |  | 21,503 |
Net income (loss) attributable to Noncontrolling Interests | 908,018 |  |  |  |  |  |  | 34,241 | 3,657
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (31,604) | (6,608)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership | 1,672 |  |  |  |  |  |  | (1,672) |
Adjustment for Noncontrolling Interests ownership in Operating Partnership |  |  |  |  | 10,607 |  |  | (10,607) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income (loss) attributable to Noncontrolling Interests | 908,018 |  |  |  |  |  |  | 34,241 | 3,657
Contributions – Noncontrolling Interests – Partially Owned Properties | 0 |  |  |  |  |  |  |  | 0
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (31,604) | (6,608)
Acquisition of Archstone |  |  |  |  |  |  |  |  | 0
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  | 0 |  |  |  | 0
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  | (117,350)
Other |  |  |  |  |  |  |  |  | 0
Balance, end of year at Dec. 31, 2015 | 10,470,368 |  | $ 37,280 | $ 3,648 | $ 8,572,365 | $ 2,009,091 | $ (152,016) |  |
Balance, end of year at Dec. 31, 2015 | $ 10,696,355 |  |  |  |  |  |  | $ 221,379 | $ 4,608

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