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Investments In and Advances To Affiliates (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) ft² | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) ft² numberOfJointVentures | Dec. 31, 2021 USD ($) ft² | Dec. 31, 2019 USD ($) ft²
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 50.00% |  |  |  |
Difference between cost of investments and the net book value of underlying net assets | $ 21,300 | $ 18,900 |  |  |
Gain on deconsolidation of affiliate | 0 | 11,778 | $ 0 |  |
Gains on disposition of property | 46,817 | 47,773 | $ 63,546 |  |
Number of joint ventures formed | numberOfJointVentures |  |  | 2 |  |
Repayments of preferred equity from unconsolidated affiliates | 0 | 80,000 | $ 0 |  |
Additional common equity contribution | $ 153,361 | 132,609 | 261,772 |  |
Rentable square feet of office property under development (in sq feet) | ft² | 1,600,000 |  |  |  |
Development, management and leasing fees recognized from unconsolidated affiliates | $ 900 | $ 1,000 | $ 600 |  |
Consolidated Affiliate: |  |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² | 1,600,000 |  |  |  |
HRLP MTW, LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Effective interest rate (in hundredths) |  | 7.29% |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  |  |  | 152,000
Contribution of cash to acquire interest in joint venture |  |  |  |  | $ 20,000
Partner's contribution of property to acquire interest in joint venture |  |  |  |  | 5,000
Advance to affiliate |  |  |  |  | $ 46,300
Consolidated Affiliate: |  |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  |  |  | 152,000
Contribution of cash to acquire interest in joint venture |  |  |  |  | $ 20,000
Percentage of equity interest in consolidated affiliates |  |  |  |  | 80.00%
Partner's contribution of property to acquire interest in joint venture |  |  |  |  | $ 5,000
Advance to affiliate |  |  |  |  | $ 46,300
Principal amount of debt |  | $ 45,000 |  |  |
Term of debt instrument |  | 5 years |  |  |
Debt issuance costs |  | $ 800 |  |  |
Term of exercisable right (in years) | 2 years |  |  |  |
HRLP MTW, LLC [Member] | Ownership Percentage [Member] |  |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Partner's interest in consolidated joint venture (in hundredths) | 20.00% |  |  |  | 20.00%
Highwoods-Markel Associates, LLC Joint Venture [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 50.00% |  |  |  |
Gain on deconsolidation of affiliate |  | 11,800 |  |  |
Granite Park Six JV, LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 50.00% |  | 50.00% |  |
Total anticipated development costs |  |  | $ 200,000 |  |
Equity funded to acquire interest in joint venture | $ 76,200 |  |  |  |
Construction loan obtained by joint venture | 70,900 | $ 115,000 |  |  |
Interest rate basis |  | SOFR |  |  |
Interest rate, basis spread (in hundredths) |  | 3.94% |  |  |
Interest rate cap (in hundredths) |  | 3.50% |  |  |
Amount of borrowings outstanding, subject to swaps | 38,800 | $ 95,200 |  |  |
Amount of loan funded to affiliate | 1,900 |  |  |  |
Contribution of cash from affiliate | $ 35,500 |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Term of exercisable right (in years) | 2 years |  |  |  |
GPI 23 Springs JV, LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 50.00% |  | 50.00% |  |
Total anticipated development costs |  |  | $ 460,000 |  |
Equity funded to acquire interest in joint venture | $ 94,000 |  |  |  |
Construction loan obtained by joint venture |  | $ 265,000 |  |  |
Interest rate basis |  | SOFR |  |  |
Interest rate, basis spread (in hundredths) |  | 3.55% |  |  |
Interest rate cap (in hundredths) |  | 3.50% |  |  |
Amount of borrowings outstanding, subject to swaps | 134,000 | $ 83,000 |  |  |
Amount of loan funded to affiliate | $ 94,600 |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Term of exercisable right (in years) | 2 years |  |  |  |
M+O JV, LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum |  |  | 50.00% |  |
Repayments of preferred equity from unconsolidated affiliates |  |  | $ 80,000 |  |
Equity funded to acquire interest in joint venture |  |  | 86,400 |  |
Additional common equity contribution |  | $ 40,000 |  |  |
Interest rate basis |  | SOFR |  |  |
Interest rate, basis spread (in hundredths) |  | 3.50% |  |  |
Fair value of debt assumed from acquisition |  |  | $ 137,000 |  |
Stated interest rate (in hundredths) |  |  | 4.50% |  |
Effective interest rate (in hundredths) |  |  | 5.30% |  |
Contribution of cash from affiliate | $ 62,100 |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Principal amount of debt | $ 134,300 |  |  |  |
Term of exercisable right (in years) | 2 years |  |  |  |
Midtown East Tampa, LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum |  |  | 50.00% |  |
Total anticipated development costs |  |  | $ 83,000 |  |
Equity funded to acquire interest in joint venture | $ 14,200 |  |  |  |
Interest rate basis | SOFR |  |  |  |
Interest rate, basis spread (in hundredths) | 4.50% |  |  |  |
Amount of loan funded to affiliate | $ 21,400 |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  | 143,000 |  |
Total rentable square feet of property under development (in sq feet) | ft² |  |  | 432,000 |  |
Advance to affiliate | 52,300 |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  | 143,000 |  |
Advance to affiliate | $ 52,300 |  |  |  |
Brand/HRLP 2827 Peachtree LLC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum |  |  |  | 50.00% |
Total anticipated development costs |  |  |  | $ 79,000 |
Interest rate basis | SOFR |  |  |  |
Interest rate, basis spread (in hundredths) | 3.10% |  |  |  |
Amount of loan funded to affiliate | $ 48,200 |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  |  | 135,000 |
Contribution of cash to acquire interest in joint venture |  |  |  | $ 13,300 |
Partner's contribution of property to acquire interest in joint venture |  |  |  | 7,700 |
Contribution of cash from affiliate |  |  |  | $ 5,600 |
Partner's percentage of equity interest in joint venture (in hundredths) |  |  |  | 50.00% |
Advance to affiliate | $ 52,800 |  |  |  |
Term of optional extension | 1 year |  |  |  |
Consolidated Affiliate: |  |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  |  |  | 135,000 |
Contribution of cash to acquire interest in joint venture |  |  |  | $ 13,300 |
Partner's contribution of property to acquire interest in joint venture |  |  |  | $ 7,700 |
Advance to affiliate | $ 52,800 |  |  |  |
Term of exercisable right (in years) | 2 years |  |  |  |
Plaza Colonnade, Tenant-in-Common [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 50.00% |  |  |  |
Kessinger/Hunter & Company, LC [Member] |  |  |  |  |
Unconsolidated Affiliates: |  |  |  |  |
Percentage of equity interest in joint ventures, maximum | 26.50% |  |  |  |

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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-13 + Details
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