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Earnings Per Share and Earnings Per Unit - Computation of Net Income per Share Basic and Net Income per Share Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Earnings Per Share [Abstract] |  |
Net income | $ 60,364 | $ 332,671
Allocation to Noncontrolling Interests – Operating Partnership | (2,143) | (11,535)
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties | (682) | (12,530)
Preferred distributions | (773) | (773)
Net income available to Common Shares | 56,766 | 307,833
Numerator for net income per share – diluted | $ 58,909 | $ 319,368
Weighted average Common Shares outstanding | 372,280 | 371,582
OP Units | 13,050 | 13,004
Dilutive Securities Options | 1,586 | 2,363
Denominator for net income per share – diluted | 386,916 | 386,949
Net income per share – basic | $ 0.15 | $ 0.83
Net income per share – diluted | $ 0.15 | $ 0.83

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