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Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Preferred Stock [Member] | Additional Paid-In Capital [Member] | Dividends In Excess Of Earnings [Member] | Treasury Stock, At Cost [Member] | Accumulated Other Comprehensive Loss [Member] | Noncontrolling Interests [Member] | Noncontrolling interest - property partnerships [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Equity, shares at Dec. 31, 2018 |  | 154,458,000 |  |  |  |  |  |  |
Equity, value at Dec. 31, 2018 | $ 8,213,968 | $ 1,545 | $ 200,000 | $ 6,407,623 | $ (675,534) | $ (2,722) | $ (47,741) | $ 619,352 | $ 1,711,445
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Cumulative effect of a change in accounting principle | (4,379) |  |  |  | (3,864) |  |  | (445) | (70)
Redemption of operating partnership units to common stock, shares |  | 14,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 0 |  | 492 |  |  |  | (492) |
Allocated net income for the year | 131,159 |  |  |  | 100,730 |  |  | 11,599 | 18,830
Dividends/distributions declared | 166,600 |  |  |  | (149,415) |  |  | (17,185) |
Shares issued pursuant to stock purchase plan, shares |  | 4,000 |  |  |  |  |  |  |
Shares issued pursuant to stock purchase plan, value | 373 |  |  | 373 |  |  |  |  |
Net activity from stock option and incentive plan, shares |  | 39,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 16,469 |  |  | 3,059 |  |  |  | 13,410 |
Contributions from noncontrolling interests in property partnerships | 4,387 |  |  |  |  |  |  |  | 4,387
Distributions to noncontrolling interests in property partnerships | (24,128) |  |  |  |  |  |  |  | (24,128)
Effective portion of interest rate contracts | (2,628) |  |  |  |  |  | (2,359) | (269) | 0
Amortization of interest rate contracts | 1,666 |  |  |  |  |  | 1,366 | 156 | 144
Reallocation of noncontrolling interest |  |  |  | 3,065 |  |  |  | (3,065) |
Equity, shares at Mar. 31, 2019 |  | 154,515,000 |  |  |  |  |  |  |
Equity, value at Mar. 31, 2019 | $ 8,170,287 | $ 1,545 | 200,000 | 6,414,612 | (728,083) | (2,722) | (48,734) | 623,061 | 1,710,608
Equity, shares at Dec. 31, 2019 | 154,790,298 | 154,790,000 |  |  |  |  |  |  |
Equity, value at Dec. 31, 2019 | $ 8,014,236 | $ 1,548 | 200,000 | 6,294,719 | (760,523) | (2,722) | (48,335) | 600,860 | 1,728,689
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Cumulative effect of a change in accounting principle | (1,679) |  |  |  | (1,505) |  |  | (174) | 0
Redemption of operating partnership units to common stock, shares |  | 462,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 5 |  | 15,490 |  |  |  | (15,495) |
Allocated net income for the year | 577,146 |  |  |  | 500,121 |  |  | 57,539 | 19,486
Dividends/distributions declared | (172,277) |  |  |  | (154,833) |  |  | (17,444) |
Shares issued pursuant to stock purchase plan, shares |  | 2,000 |  |  |  |  |  |  |
Shares issued pursuant to stock purchase plan, value | 325 |  |  | 325 |  |  |  |  |
Net activity from stock option and incentive plan, shares |  | 61,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 23,060 | $ 0 |  | 7,383 |  |  |  | 15,677 |
Contributions from noncontrolling interests in property partnerships | 3,876 |  |  |  |  |  |  |  | 3,876
Distributions to noncontrolling interests in property partnerships | (15,750) |  |  |  |  |  |  |  | (15,750)
Effective portion of interest rate contracts | (9,720) |  |  |  |  |  | (8,732) | (988) | 0
Amortization of interest rate contracts | 1,666 |  |  |  |  |  | 1,367 | 155 | 144
Reallocation of noncontrolling interest | $ 0 |  |  | 3,558 |  |  |  | (3,558) |
Equity, shares at Mar. 31, 2020 | 155,314,555 | 155,315,000 |  |  |  |  |  |  |
Equity, value at Mar. 31, 2020 | $ 8,420,883 | $ 1,553 | $ 200,000 | $ 6,321,475 | $ (416,740) | $ (2,722) | $ (55,700) | $ 636,572 | $ 1,736,445

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