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Mortgages Payable - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) mortgage | Dec. 31, 2019 USD ($) mortgage property | Dec. 31, 2018 USD ($)
Debt |  |  |
Principal payments on mortgages payable | $ 108,789 | $ 20,723 | $ 21,905
Mortgage loans assumed |  | 130,800 |
Mortgages payable |  |  |
Debt |  |  |
Principal payments on mortgages payable | $ 108,800 | $ 20,700 |
Number of mortgages assumed | mortgage | 0 | 2 |
Mortgage loans assumed |  | $ 130,800 |
Number of properties related to mortgages assumed | property |  | 33 |
Unamortized net premiums | $ 1,700 |  |
Deferred financing costs | 973 | $ 1,300 |
Mortgages payable | Mortgages repaid in full |  |  |
Debt |  |  |
Principal payments on mortgages payable | $ 103,400 | $ 15,800 |
Number of mortgages repaid in full | mortgage | 9 | 1 |

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- Definition Number Of Mortgages Assumed During Period + References No definition available. + Details
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- Definition Number Of Properties Related To Mortgages Assumed During Period + References No definition available. + Details
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- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28567-108399 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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