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Loans and Investments - Allowance for Credit Losses Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2023 USD ($) loan | Dec. 31, 2023 USD ($) loan | Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Amount of provision for credit losses |  | $ 68,805 | $ 19,318 | $ (24,315)
Recoveries of reserves |  | 4,776 | 1,500 | 24,315
Unfunded commitments related to structured loans and investments | $ 1,310,000 | 1,310,000 | 1,150,000 |
Accrued interest receivable related to loans | $ 124,200 | $ 124,200 | $ 108,500 |
Number of loans for which no provision for loan loss made | loan | 0 | 0 | 0 |
Retail |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Amount of provision for credit losses |  | $ (2,526) | $ 0 | (42)
Recoveries of reserves |  | 2,500 |  |
Office |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Amount of provision for credit losses |  | $ (2,320) | $ 89 | $ 6,227
Recoveries of reserves | $ 2,300 |  |  |

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- Definition Represents the amount of outstanding unfunded commitments related to loans and investments that the entity is obligated to fund as the borrowers meet certain requirements. + References No definition available. + Details
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- Definition Represents the number of loans for which the value of the collateral securing the loan was less than the carrying value of the loan for which the entity has not recorded a provision for loan loss. + References No definition available. + Details
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- Definition Amount, before allowance for credit loss, of accrued interest on financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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