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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 |  | 35,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 1 |  | 1,211 |  |  |  | (1,212) |
Allocated net income for the year | 334,620 |  |  |  | 267,681 |  |  | 30,627 | 36,312
Dividends/distributions declared | (333,266) |  |  |  | (298,875) |  |  | (34,391) |
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 |  | 66,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 27,332 |  |  | 4,554 |  |  |  | 22,778 |
Acquisition of noncontrolling interest in property partnership | (187,006) |  |  | (162,505) |  |  |  |  | (24,501)
Contributions from noncontrolling interests in property partnerships | 12,148 |  |  |  |  |  |  |  | 12,148
Distributions to noncontrolling interests in property partnerships | (39,401) |  |  |  |  |  |  |  | (39,401)
Effective portion of interest rate contracts | (7,054) |  |  |  |  |  | (6,332) | (722) | 0
Amortization of interest rate contracts | 3,332 |  |  |  |  |  | 2,733 | 311 | 288
Reallocation of noncontrolling interest |  |  |  | 27,705 |  |  |  | (27,705) |
Equity, shares at Jun. 30, 2019 |  | 154,563,000 |  |  |  |  |  |  |
Equity, value at Jun. 30, 2019 | 8,020,667 | $ 1,546 | 200,000 | 6,278,961 | (710,592) | (2,722) | (51,340) | 608,593 | 1,696,221
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
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, shares |  | 21,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 1 |  | 719 |  |  |  | (720) |
Allocated net income for the year | 203,461 |  |  |  | 166,951 |  |  | 19,028 | 17,482
Dividends/distributions declared | (166,666) |  |  |  | (149,460) |  |  | (17,206) |
Net activity from stock option and incentive plan, shares |  | 27,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 10,863 |  |  | 1,495 |  |  |  | 9,368 |
Acquisition of noncontrolling interest in property partnership | (187,006) |  |  | (162,505) |  |  |  |  | (24,501)
Contributions from noncontrolling interests in property partnerships | 7,761 |  |  |  |  |  |  |  | 7,761
Distributions to noncontrolling interests in property partnerships | (15,273) |  |  |  |  |  |  |  | (15,273)
Effective portion of interest rate contracts | (4,426) |  |  |  |  |  | (3,973) | (453) |
Amortization of interest rate contracts | 1,666 |  |  |  |  |  | 1,367 | 155 | 144
Reallocation of noncontrolling interest | 0 |  |  | 24,640 |  |  |  | (24,640) |
Equity, shares at Jun. 30, 2019 |  | 154,563,000 |  |  |  |  |  |  |
Equity, value at Jun. 30, 2019 | $ 8,020,667 | $ 1,546 | 200,000 | 6,278,961 | (710,592) | (2,722) | (51,340) | 608,593 | 1,696,221
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 |  | 765,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 8 |  | 26,336 |  |  |  | (26,344) |
Allocated net income for the year | 875,726 |  |  |  | 769,482 |  |  | 87,525 | 18,719
Dividends/distributions declared | (344,603) |  |  |  | (309,965) |  |  | (34,638) |
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 |  | 65,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 33,285 | $ 0 |  | 8,256 |  |  |  | 25,029 |
Contributions from noncontrolling interests in property partnerships | 5,957 |  |  |  |  |  |  |  | 5,957
Distributions to noncontrolling interests in property partnerships | (29,065) |  |  |  |  |  |  |  | (29,065)
Effective portion of interest rate contracts | (10,379) |  |  |  |  |  | (9,333) | (1,046) | 0
Amortization of interest rate contracts | 3,343 |  |  |  |  |  | 2,747 | 308 | 288
Reallocation of noncontrolling interest | $ 0 |  |  | 11,029 |  |  |  | (11,029) |
Equity, shares at Jun. 30, 2020 | 155,622,286 | 155,622,000 |  |  |  |  |  |  |
Equity, value at Jun. 30, 2020 | $ 8,547,146 | $ 1,556 | 200,000 | 6,340,665 | (302,511) | (2,722) | (54,921) | 640,491 | 1,724,588
Equity, shares at Mar. 31, 2020 |  | 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
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, shares |  | 303,000 |  |  |  |  |  |  |
Redemption of operating partnership units to common stock, value | 0 | $ 3 |  | 10,846 |  |  |  | (10,849) |
Allocated net income for the year | 298,580 |  |  |  | 269,361 |  |  | 29,986 | (767)
Dividends/distributions declared | (172,326) |  |  |  | (155,132) |  |  | (17,194) |
Net activity from stock option and incentive plan, shares |  | 4,000 |  |  |  |  |  |  |
Net activity from stock option and incentive plan, value | 10,225 |  |  | 873 |  |  |  | 9,352 |
Contributions from noncontrolling interests in property partnerships | 2,081 |  |  |  |  |  |  |  | 2,081
Distributions to noncontrolling interests in property partnerships | (13,315) |  |  |  |  |  |  |  | (13,315)
Effective portion of interest rate contracts | (659) |  |  |  |  |  | (601) | (58) |
Amortization of interest rate contracts | 1,677 |  |  |  |  |  | 1,380 | 153 | 144
Reallocation of noncontrolling interest | $ 0 |  |  | 7,471 |  |  |  | (7,471) |
Equity, shares at Jun. 30, 2020 | 155,622,286 | 155,622,000 |  |  |  |  |  |  |
Equity, value at Jun. 30, 2020 | $ 8,547,146 | $ 1,556 | $ 200,000 | $ 6,340,665 | $ (302,511) | $ (2,722) | $ (54,921) | $ 640,491 | $ 1,724,588

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant