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Fair Value of Assets and Liabilities | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities | Fair Value of Assets and Liabilities The following table presents certain of our assets that are measured at fair value at December 31, 2024 and 2023, categorized by the level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset.
|  | As of December 31, 2024 |  | As of December 31, 2023
Description |  | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value
Recurring Fair Value Measurements Assets: |  |  |  |  |  |  |  |
Investment in unconsolidated joint venture (Level 3) (1) |  | $ | 81,949 |  |  | $ | 81,949 |  |  | $ | 85,699 |  |  | $ | 85,699 |
Investment in unconsolidated joint venture (Level 3) (2) |  | $ | 44,910 |  |  | $ | 44,910 |  |  | $ | 44,217 |  |  | $ | 44,217 |
Non-Recurring Fair Value Measurements Assets: |  |  |  |  |  |  |  |
Real estate properties held for sale (Level 2) (3) |  | $ | 24,074 |  |  | $ | 24,074 |  |  | $ | — |  |  | $ | — |
(1)The 10% equity interest we own in the Seaport JV is included in investments in unconsolidated joint ventures in our consolidated balance sheet, and is reported at fair value, which is based on significant unobservable inputs (Level 3 inputs). The significant unobservable inputs used in the fair value analysis are a discount rate of 7.00%, an exit capitalization rate of 6.00%, a holding period of 10 years and market rents. The assumptions made in the fair value analysis are based on the location, type and nature of the property, and current and anticipated market conditions. See Note 3 for further information regarding this joint venture. (2)The 20% equity interest we own in the LSMD JV is included in investments in unconsolidated joint ventures in our consolidated balance sheet, and is reported at fair value, which is based on significant unobservable inputs (Level 3 inputs). The significant unobservable inputs used in the fair value analysis are discount rates of between 6.25% and 7.75%, exit capitalization rates of between 5.00% and 7.00%, holding periods of 10 years and market rents. The assumptions we made in the fair value analysis are based on the location, type and nature of each property, and current and anticipated market conditions. See Note 3 for further information regarding this joint venture. (3)We have assets in our consolidated balance sheets that are measured at fair value on a non-recurring basis. During the year ended December 31, 2024, we recorded impairment charges of $29,016 to reduce the carrying value of two medical office and life science properties that are classified as held for sale to their estimated aggregate sales price, less estimated costs to sell, of $24,074 under agreements or letters of intent to sell that, as of December 31, 2024, we had entered into with third parties. See Note 3 for further information about impairment charges and the properties we have classified as held for sale. In addition to the assets described in the table above, our financial instruments at December 31, 2024 and December 31, 2023 included cash and cash equivalents, restricted cash, certain other assets, senior unsecured notes, senior secured notes, secured debt and finance leases and certain other unsecured obligations and liabilities. The fair values of these financial instruments approximated their carrying values in our consolidated financial statements as of such dates, except as follows:
|  | As of December 31, 2024 |  | As of December 31, 2023
Description |  | Carrying Value (1) |  | Estimated Fair Value |  | Carrying Value (1) |  | Estimated Fair Value
Senior unsecured notes, 9.750% coupon rate, due 2025 |  | $ | 379,392 |  |  | $ | 379,970 |  |  | $ | 497,454 |  |  | $ | 490,750 |
Senior secured notes, zero coupon rate, due 2026 |  | 826,974 |  |  | 885,108 |  |  | 731,211 |  |  | 771,981 |
Senior unsecured notes, 4.750% coupon rate, due 2028 |  | 496,018 |  |  | 429,170 |  |  | 494,746 |  |  | 384,110 |
Senior unsecured notes, 4.375% coupon rate, due 2031 |  | 494,702 |  |  | 368,240 |  |  | 493,845 |  |  | 375,000 |
Senior unsecured notes, 5.625% coupon rate, due 2042 |  | 343,302 |  |  | 218,260 |  |  | 342,946 |  |  | 211,400 |
Senior unsecured notes, 6.250% coupon rate, due 2046 |  | 243,905 |  |  | 157,700 |  |  | 243,627 |  |  | 154,000 |
Secured debts and finance leases |  | 126,611 |  |  | 126,001 |  |  | 13,020 |  |  | 12,284 |
|  | $ | 2,910,904 |  |  | $ | 2,564,449 |  |  | $ | 2,816,849 |  |  | $ | 2,399,525 |
(1)Includes unamortized net premiums, discounts and debt issuance costs, if any. We estimated the fair values of our two issuances of senior unsecured notes due 2042 and 2046 based on the closing price on Nasdaq (Level 1 inputs as defined in the fair value hierarchy under GAAP) as of December 31, 2024 and 2023. We estimated the fair values of our three issuances of senior unsecured notes due 2025, 2028 and 2031 and our issuance of senior secured notes due 2026 using an average of the bid and ask price on Nasdaq on or about December 31, 2024 and 2023 (Level 2 inputs as defined in the fair value hierarchy under GAAP). We estimated the fair values of our secured debts by using discounted cash flows analyses and currently prevailing market terms as of the measurement date (Level 3 inputs as defined in the fair value hierarchy under GAAP). Because Level 3 inputs are unobservable, our estimated fair values may differ materially from the actual fair values.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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