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Earnings Per Share and Earnings Per Unit - Computation of Net Income per Unit Basic and Net Income per Unit Diluted for Operating Partnership (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net income | $ 1,396,714 | $ 962,501 | $ 1,009,708
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties | $ (17,964) | $ (14,855) | $ (3,297)
Dilutive Securities Options | 1,924 | 1,080 | 2,965
ATM forward sales | 69 |  |
Denominator for net income per share – diluted | 388,089 | 385,874 | 386,333
Net income per Unit – basic | $ 3.56 | $ 2.45 | $ 2.61
Net income per Unit – diluted | $ 3.54 | $ 2.45 | $ 2.60
ERPOP [Member] |  |  |
Net income | $ 1,396,714 | $ 962,501 | $ 1,009,708
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties | (17,964) | (14,855) | (3,297)
Allocation to Preference Units | (3,090) | (3,090) | (3,090)
Numerator for net income per Unit – basic and diluted | $ 1,375,660 | $ 944,556 | $ 1,003,321
Denominator for net income per Unit – basic | 386,096 | 384,794 | 383,368
Dilutive Securities Options | 1,924 | 1,080 | 2,965
ATM forward sales | 69 |  |
Denominator for net income per share – diluted | 388,089 | 385,874 | 386,333
Net income per Unit – basic | $ 3.56 | $ 2.45 | $ 2.61
Net income per Unit – diluted | $ 3.54 | $ 2.45 | $ 2.60

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