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Organization (Detail) - shares | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Units of partnership interest (in shares) | 9,305,651 | 10,479,194 | 10,491,222
Operating Partnership |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Ownership interest (percent) | 95.20% |  |

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