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Loans and Investments - Summary of impaired loans (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($) item
Loans and Investments |  |
UPB | $ 159,940 | $ 282,785
Carrying Value | 148,839 | 254,938
Allowance for Credit Losses | $ 86,886 | $ 106,265
Wtd. Avg. First Dollar LTV Ratio | 3 | 1
Wtd. Avg. Last Dollar LTV Ratio | 89 | 94
Number of impaired loans (less unearned revenue and other holdbacks and adjustments) by asset class | item | 8 | 10
Land |  |
Loans and Investments |  |
UPB | $ 134,215 | $ 134,215
Carrying Value | 127,868 | 127,829
Allowance for Credit Losses | $ 77,869 | $ 77,869
Wtd. Avg. First Dollar LTV Ratio | 0 | 0
Wtd. Avg. Last Dollar LTV Ratio | 99 | 99
Hotel Portfolio |  |
Loans and Investments |  |
UPB |  | $ 110,000
Carrying Value |  | 89,613
Allowance for Credit Losses |  | $ 7,500
Wtd. Avg. First Dollar LTV Ratio |  | 0
Wtd. Avg. Last Dollar LTV Ratio |  | 94
Retail |  |
Loans and Investments |  |
UPB | $ 22,045 | $ 30,079
Carrying Value | 17,291 | 28,957
Allowance for Credit Losses | $ 5,817 | $ 13,851
Wtd. Avg. First Dollar LTV Ratio | 14 | 10
Wtd. Avg. Last Dollar LTV Ratio | 33 | 75
Healthcare |  |
Loans and Investments |  |
UPB |  | $ 4,625
Carrying Value |  | 4,673
Allowance for Credit Losses |  | $ 3,845
Wtd. Avg. First Dollar LTV Ratio |  | 0
Wtd. Avg. Last Dollar LTV Ratio |  | 83
Office |  |
Loans and Investments |  |
UPB | $ 1,980 | $ 2,166
Carrying Value | 1,980 | 2,166
Allowance for Credit Losses | $ 1,500 | $ 1,500
Wtd. Avg. First Dollar LTV Ratio | 0 | 0
Wtd. Avg. Last Dollar LTV Ratio | 51 | 71
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 | 63 | 63
Wtd. Avg. Last Dollar LTV Ratio | 63 | 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 No definition available. + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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- Definition Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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