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Summary of Significant Accounting Policies (Supplemental Consolidated Statements of Cash Flows Information) (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Supplemental disclosure of cash activities: |  |
Cash paid for interest | $ 17,907,000 | $ 16,593,000
Supplemental disclosure of non-cash activities: |  |
Capitalization of interest and financing costs | 1,187,000 | 1,125,000
Recognition of right-of-use assets and related lease liabilities | $ 13,992,000 |
Issuance of OP Units in connection with a land parcel acquisition |  | $ 975,000

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