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Consolidated Statement of Equity (Parenthetical) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Shares pursuant to dividend reinvestment plan (in shares) | 96,268 | 83,978
Shares due to exercise of employee stock options and issuance of directors' deferred stock (in shares) | 910 | 11,745
Number of partnership units issued in transaction (in shares) | 1,416,071 |
Limited Partner |  |
Shares pursuant to dividend reinvestment plan (in shares) | 19,493 | 15,101
Dividend Distributions Payable |  |
Distributions payable common stock, per share (in usd per share) | $ 0.53 | $ 0.53
Distributions partnership units, per unit (in usd per share) | 0.53 | 0.53
Series D Cumulative Redeemable Preferred Stock | Dividend Distributions Payable |  |
Distributions payable on preferred stock, per share (in usd per share) | 38.28 | 38.28
Series E Cumulative Redeemable Preferred Stock | Dividend Distributions Payable |  |
Distributions payable on preferred stock, per share (in usd per share) | $ 37.50 | $ 37.50

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