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Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands, shares in Millions, ft² in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) ft² property variable_interest_entity note_receivable financing_receivable state joint_venture $ / shares shares | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) financing_receivable $ / shares | Dec. 31, 2022 USD ($) | Jul. 20, 2021 $ / shares
Business Overview: |  |  |  |  |
Gross investment amount, total | $ 13,400,000 |  |  |  |
Number of real estate properties | property | 654 |  |  |  |
Number of states that the company owns real estate in, whole units | state | 35 |  |  |  |
Approximate square feet invested in by company | ft² | 38.4 |  |  |  |
Nationwide portfolio (percent) | 92.00% |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.01 |  | $ 0.01 |  |
Number of properties held in unconsolidated joint ventures | property | 33 |  |  |  |
Principles of Consolidation: |  |  |  |  |
Equity ownership for consolidation (percent) | 100.00% |  |  |  |
Number of variable interest entities | variable_interest_entity | 4 |  |  |  |
Redeemable Non-Controlling Interests: |  |  |  |  |
Redeemable non-controlling interests | $ 3,880 | $ 2,000 | $ 3,868 | $ 2,014 |
Asset Impairment: |  |  |  |  |
Impairment of real estate assets | 15,900 |  |  |  |
Goodwill Impairment |  |  |  |  |
Impairment of goodwill | 250,530 | 0 |  |  |
Real Estate Notes Receivable: |  |  |  |  |
Investment in financing receivable, net | 174,400 |  |  |  |
Allowance for Credit Losses, Interest Income, Income from Real Estate Notes Receivable: |  |  |  |  |
Credit loss reserves | $ 0 | 5,200 | $ 5,196 |  |
Number of recognized lease financial receivables | financing_receivable | 2 |  |  |  |
Income from financing receivables | $ 2,100 |  |  |  |
Number of real estate notes receivable | financing_receivable |  |  | 2 |  |
Financing receivable, nonaccrual |  |  | $ 48,900 |  |
Fair Value, Inputs, Level 3 |  |  |  |  |
Asset Impairment: |  |  |  |  |
Number of properties measured at fair value | property | 3 |  |  |  |
Properties measured at fair value | $ 2,900 |  |  |  |
One |  |  |  |  |
Goodwill Impairment |  |  |  |  |
Reporting unit, carrying value | 12,000,000 |  |  |  |
Notes Receivable |  |  |  |  |
Allowance for Credit Losses, Interest Income, Income from Real Estate Notes Receivable: |  |  |  |  |
Interest income | $ 2,400 | $ 2,100 |  |  |
Variable Interest Entity |  |  |  |  |
Principles of Consolidation: |  |  |  |  |
Number of variable interest entities | variable_interest_entity | 3 |  |  |  |
Number of notes receivable | note_receivable | 2 |  |  |  |
Number of joint ventures | joint_venture | 1 |  |  |  |
HealthCare Realty Trust Incorporated |  |  |  |  |
Business Overview: |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 0.01
Non-Controlling Interest Holders | Healthcare Trust of America Holdings L P |  |  |  |  |
Principles of Consolidation: |  |  |  |  |
Limited partner's capital, units outstanding (in shares) | shares | 5.2 |  |  |  |
Limited partners ownership interest (in percent) | 1.40% |  |  |  |
HealthCare Realty Trust Incorporated | Other Investors |  |  |  |  |
Business Overview: |  |  |  |  |
Subsidiary, ownership percentage, noncontrolling owner | 1.40% |  |  |  |
Property Entities Not Determined to be VIEs |  |  |  |  |
Principles of Consolidation: |  |  |  |  |
Equity interest owned (percent) | 100.00% |  |  |  |
Healthcare Trust of America Holdings L P |  |  |  |  |
Principles of Consolidation: |  |  |  |  |
Equity interest owned (percent) | 98.60% |  |  |  |
Real Estate Properties Held in Joint Ventures |  |  |  |  |
Business Overview: |  |  |  |  |
Joint venture ownership (percent) | 43.00% |  |  |  |

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