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Organization, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) property segment | Dec. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Limited partnership to common stock conversion ratio | 100.00% |
Number of retail properties | 187 |
Number of reportable segments | segment | 3 |
Credit loss allowance | $ | $ 0.5 |
Core Portfolio |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Number of retail properties | 131 |
Properties owned percentage | 100.00% |
Opportunity Funds |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Number of retail properties | 56 |
Structured Financing | ASU 2016-13 |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Cumulative effect adjustment to accumulated earnings | $ | $ 0.4 |
Operating Partnership, as General Partner or Managing Member |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Remaining funds rate of distribution to operating partnership (in percent) | 20.00% |
Operating Partnership, as General Partner or Managing Member | Acadia's OP Ownership |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Equity interest held by Operating Partnership | 95.00% | 95.00%
Institutional Investors |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Remaining funds rate of distribution to all partners (in percent) | 80.00% |

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