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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 | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Net income | $ 271,481 | $ 321,299 | $ 604,152 | $ 430,556
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties | $ (880) | $ (821) | $ (13,410) | $ (1,620)
Dilutive Securities Options | 1,095 | 2,880 | 1,570 | 2,790
Denominator for net income per share – diluted | 385,913 | 386,107 | 386,272 | 385,644
Net income per Unit – basic | $ 0.70 | $ 0.83 | $ 1.53 | $ 1.11
Net income per Unit – diluted | $ 0.70 | $ 0.83 | $ 1.53 | $ 1.11
ERPOP [Member] |  |  |  |
Net income | $ 271,481 | $ 321,299 | $ 604,152 | $ 430,556
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties | (880) | (821) | (13,410) | (1,620)
Allocation to Preference Units | (772) | (772) | (1,545) | (1,545)
Numerator for net income per Unit – basic and diluted | $ 269,829 | $ 319,706 | $ 589,197 | $ 427,391
Denominator for net income per Unit – basic | 384,818 | 383,227 | 384,702 | 382,854
Dilutive Securities Options | 1,095 | 2,880 | 1,570 | 2,790
Denominator for net income per share – diluted | 385,913 | 386,107 | 386,272 | 385,644
Net income per Unit – basic | $ 0.70 | $ 0.83 | $ 1.53 | $ 1.11
Net income per Unit – diluted | $ 0.70 | $ 0.83 | $ 1.53 | $ 1.11

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- Definition Weighted average number of limited partnership and general partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership and general partnership units have been outstanding to the total time in that period. Includes, for example, the number of units distributed to unit holders whereby unit holders have the ability to elect to receive the unit holders' entire distribution in cash or units of equivalent value or there is a potential limitation on the total amount of cash that all unit holders can elect to receive in aggregate. + References No definition available. + Details
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