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Loans and Investments - Summary of impaired loans (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) loan | Dec. 31, 2022 USD ($) loan
Loans and Investments |  |
UPB | $ 238,962 | $ 157,960
Carrying Value | 228,172 | 147,131
Allowance for Credit Losses | $ 98,337 | $ 85,386
Wtd. Avg. First Dollar LTV Ratio | 0.02 | 0.03
Wtd. Avg. Last Dollar LTV Ratio | 0.97 | 0.96
Number of impaired loans (less unearned revenue and other holdbacks and adjustments) by asset class | loan | 9 | 7
Land |  |
Loans and Investments |  |
UPB | $ 134,215 | $ 134,215
Carrying Value | 127,868 | 127,868
Allowance for Credit Losses | $ 77,869 | $ 77,869
Wtd. Avg. First Dollar LTV Ratio | 0 | 0
Wtd. Avg. Last Dollar LTV Ratio | 0.99 | 0.99
Office |  |
Loans and Investments |  |
UPB | $ 44,625 |
Carrying Value | 44,625 |
Allowance for Credit Losses | $ 7,951 |
Wtd. Avg. First Dollar LTV Ratio | 0 |
Wtd. Avg. Last Dollar LTV Ratio | 1 |
Multifamily |  |
Loans and Investments |  |
UPB | $ 36,377 |
Carrying Value | 36,202 |
Allowance for Credit Losses | $ 5,000 |
Wtd. Avg. First Dollar LTV Ratio | 0 |
Wtd. Avg. Last Dollar LTV Ratio | 1 |
Retail |  |
Loans and Investments |  |
UPB | $ 22,045 | $ 22,045
Carrying Value | 17,777 | 17,563
Allowance for Credit Losses | $ 5,817 | $ 5,817
Wtd. Avg. First Dollar LTV Ratio | 0.13 | 0.14
Wtd. Avg. Last Dollar LTV Ratio | 0.79 | 0.79
Commercial |  |
Loans and Investments |  |
UPB | $ 1,700 | $ 1,700
Carrying Value | 1,700 | 1,700
Allowance for Credit Losses | $ 1,700 | $ 1,700
Wtd. Avg. First Dollar LTV Ratio | 0.63 | 0.63
Wtd. Avg. Last Dollar LTV Ratio | 0.63 | 0.63

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- Definition For an impaired loan, the weighted average loan to value ratio that is calculated by comparing the total of the carrying value of the company's loan and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will absorb a total loss of its position. + References No definition available. + Details
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- Definition For an impaired loan, the weighted average loan to value ratio that is calculated by comparing the total of the carrying value of the company's loan and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will initially absorb a loss. + References No definition available. + Details
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- Definition The number of impaired loans (less unearned revenue and other holdbacks and adjustments) by asset class. + References No definition available. + 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/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 29 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479851/948-310-S99-1 + Details
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- Definition Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount at par value of financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 + Details
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