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Consolidated Statement of Capital and Noncontrolling Interests Statement - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Common Stock, Shares, Outstanding | 155,622,286 |  | 155,622,286 |  |  | 154,790,298 |  |
Cumulative effect of a change in accounting principle |  |  | $ (1,679) | $ (4,379) |  |  |  |
Effective portion of interest rate contracts | $ (659) | $ (4,426) | (10,379) | (7,054) |  |  |  |
Amortization of interest rate contracts | 1,677 | 1,666 | 3,343 | 3,332 |  |  |  |
Acquisition of noncontrolling interest in property partnership |  | (187,006) |  | (187,006) |  |  |  |
Contributions from noncontrolling interests in property partnerships | 2,081 | 7,761 | 5,957 | 12,148 |  |  |  |
Distributions to noncontrolling interests in property partnerships | $ (13,315) | $ (15,273) | $ (29,065) | $ (39,401) |  |  |  |
General Partner [Member] |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 1,731,000 | 1,726,000 | 1,731,000 | 1,726,000 | 1,731,000 | 1,727,000 | 1,725,000 | 1,722,000
Contributions, units | 0 | 1,000 | 1,000 | 3,000 |  |  |  |
Conversion of redeemable partnership units | 0 |  | 3,000 | 1,000 |  |  |  |
Limited Partner [Member] |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 153,891,000 | 152,837,000 | 153,891,000 | 152,837,000 | 153,584,000 | 153,063,000 | 152,790,000 | 152,736,000
Contributions, units | 5,000 | 26,000 | 68,000 | 67,000 |  |  |  |
Conversion of redeemable partnership units | 302,000 | 21,000 | 760,000 | 34,000 |  |  |  |
Preferred Units [Member] |  |  |  |  |  |  |  |
Beginning Balance | $ 193,623 | $ 193,623 | $ 193,623 | $ 193,623 | $ 193,623 | $ 193,623 | $ 193,623 | $ 193,623
Allocated net income for the period | 2,625 | 2,625 | 5,250 | 5,250 |  |  |  |
Distributions | (2,625) | (2,625) | (5,250) | (5,250) |  |  |  |
Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Beginning Balance | (54,921) | (51,340) | (54,921) | (51,340) | (55,700) | (48,335) | (48,734) | (47,741)
Effective portion of interest rate contracts | (601) | (3,973) | (9,333) | (6,332) |  |  |  |
Amortization of interest rate contracts | 1,380 | 1,367 | 2,747 | 2,733 |  |  |  |
Noncontrolling interest - property partnerships [Member] |  |  |  |  |  |  |  |
Beginning Balance | 1,724,588 | 1,696,221 | 1,724,588 | 1,696,221 | 1,736,445 | 1,728,689 | 1,710,608 | 1,711,445
Cumulative effect of a change in accounting principle |  |  | 0 | (70) |  |  |  |
Allocated net income for the period | (767) | 17,482 | 18,719 | 36,312 |  |  |  |
Effective portion of interest rate contracts |  |  | 0 | 0 |  |  |  |
Amortization of interest rate contracts | 144 | 144 | 288 | 288 |  |  |  |
Acquisition of noncontrolling interest in property partnership |  | (24,501) |  | (24,501) |  |  |  |
Contributions from noncontrolling interests in property partnerships | 2,081 | 7,761 | 5,957 | 12,148 |  |  |  |
Distributions to noncontrolling interests in property partnerships | (13,315) | (15,273) | (29,065) | (39,401) |  |  |  |
Total Capital [Member] |  |  |  |  |  |  |  |
Beginning Balance | 6,691,356 | 5,401,414 | 6,691,356 | 5,401,414 | 6,500,995 | 5,254,152 | 5,458,671 | 5,912,323
Cumulative effect of a change in accounting principle |  |  | (1,505) | (3,934) |  |  |  |
Contributions, value | 450 | 882 | 7,162 | 5,702 |  |  |  |
Allocated net income for the period | 273,847 | 186,794 | 804,752 | 310,032 |  |  |  |
Distributions | (155,132) | (149,460) | (309,965) | (298,875) |  |  |  |
Unearned compensation | 423 | 613 | 1,419 | (775) |  |  |  |
Conversion of redeemable partnership units, value | 10,849 | 720 | 26,344 | 1,212 |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | 70,235 | 100,174 | 938,403 | (306,701) |  |  |  |
Effective portion of interest rate contracts | (601) | (3,973) | (9,333) | (6,332) |  |  |  |
Amortization of interest rate contracts | 1,524 | 1,511 | 3,035 | 3,021 |  |  |  |
Acquisition of noncontrolling interest in property partnership |  | (187,006) |  | (187,006) |  |  |  |
Contributions from noncontrolling interests in property partnerships | 2,081 | 7,761 | 5,957 | 12,148 |  |  |  |
Distributions to noncontrolling interests in property partnerships | (13,315) | (15,273) | (29,065) | (39,401) |  |  |  |
Noncontrolling interest - Redeemable partnership units [Member] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount | 1,581,010 | 2,324,238 | 1,581,010 | 2,324,238 | 1,639,855 | 2,468,753 | 2,414,240 | 2,000,591
Cumulative effect of a change in accounting principle |  |  | (174) | (445) |  |  |  |
Contributions, value | (98) | 1,082 | 39,643 | 35,482 |  |  |  |
Allocated net income for the period | 29,986 | 19,028 | 87,525 | 30,627 |  |  |  |
Distributions | (17,194) | (17,206) | (34,638) | (34,391) |  |  |  |
Unearned compensation | 9,450 | 8,286 | (14,614) | (12,704) |  |  |  |
Conversion of redeemable partnership units, value | (10,849) | (720) | (26,344) | (1,212) |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | (70,235) | (100,174) | (938,403) | 306,701 |  |  |  |
Effective portion of interest rate contracts | (58) | (453) | (1,046) | (722) |  |  |  |
Amortization of interest rate contracts | 153 | 155 | 308 | 311 |  |  |  |
Partners' Capital (General and Limited Partners)[Member] |  |  |  |  |  |  |  |
Beginning Balance | 4,828,066 | 3,562,910 | 4,828,066 | 3,562,910 | $ 4,626,627 | $ 3,380,175 | $ 3,603,174 | $ 4,054,996
Cumulative effect of a change in accounting principle |  |  | (1,505) | (3,864) |  |  |  |
Contributions, value | 450 | 882 | 7,162 | 5,702 |  |  |  |
Allocated net income for the period | 271,989 | 166,687 | 780,783 | 268,470 |  |  |  |
Distributions | (152,507) | (146,835) | (304,715) | (293,625) |  |  |  |
Unearned compensation | 423 | 613 | 1,419 | (775) |  |  |  |
Conversion of redeemable partnership units, value | 10,849 | 720 | 26,344 | 1,212 |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | $ 70,235 | 100,174 | $ 938,403 | (306,701) |  |  |  |
Acquisition of noncontrolling interest in property partnership |  | $ (162,505) |  | $ (162,505) |  |  |  |

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