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Stockholders’ Equity of the Company and Partners' Capital of the Operating Partnership (Tables) | 12 Months Ended
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Dec. 31, 2020
Stockholders' Equity Note [Abstract] |
Common Stock and Units Roll-Forward | The following table is a roll-forward of the Company's shares of common stock outstanding and the Operating Partnership's Units outstanding, including equity compensation awards which are discussed Note 11, for the three years ended December 31, 2020:
| Shares of Common Stock Outstanding |  | General Partner and Limited Partner Units Outstanding
Balance at December 31, 2017 | 119,883,180 |  |  | 123,891,401 |
Issuance of Common Stock/Contribution of General Partner Units (A) | 4,800,000 |  |  | 4,800,000 |
Issuance of Restricted Stock/Restricted Unit Awards | 227,059 |  |  | 227,059 |
Vesting of Performance Units (as defined in Note 11) | 150,772 |  |  | 150,772 |
Repurchase and Retirement of Restricted Stock/Restricted Unit Awards | (104,301) |  |  | (104,301) |
Conversion of Limited Partner Units (B) | 1,350,721 |  |  | — |
Retirement of Limited Partner Units (C) | — |  |  | (33,333) |
Balance at December 31, 2018 | 126,307,431 |  |  | 128,931,598 |
Issuance of Service Awards and Performance Awards (as defined in Note 11) | 109,353 |  |  | 406,569 |
Vesting of Performance Units (as defined in Note 11) | 169,033 |  |  | 169,033 |
Repurchase and Retirement of Service Awards and Performance Awards (as defined in Note 11) | (76,855) |  |  | (89,978) |
Conversion of Limited Partner Units (B) | 485,516 |  |  | — |
Balance at December 31, 2019 | 126,994,478 |  |  | 129,417,222 |
Issuance of Common Stock/Contribution of General Partner Units (D) | 1,842,281 |  |  | 1,842,281 |
Issuance of Service Awards and Performance Awards (as defined in Note 11) | — |  |  | 464,975 |
Vesting of Performance Units (as defined Note 11) | 107,752 |  |  | 107,752 |
Repurchase and Retirement of Service Awards and Performance Awards (as defined in Note 11) | (65,709) |  |  | (67,676) |
Conversion of Limited Partner Units (B) | 172,610 |  |  | — |
Balance at December 31, 2020 | 129,051,412 |  |  | 131,764,554 |
Summary of Dividends/Distributions | The following table summarizes dividends/distributions accrued during the past three years:
| 2020 Total Dividend/ Distribution |  | 2019 Total Dividend/ Distribution |  | 2018 Total Dividend/ Distribution
Common Stock/Operating Partnership Units | $ | 130,943 |  |  | $ | 119,522 |  |  | $ | 111,478 |

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- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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