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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Current Expected Credit Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Allowance reserve | $ 35,319 | $ 26,482
Unfunded commitments | 3,622 | 4,017
Total General CECL Allowance | 38,941 | 30,499
Commercial Mortgage Portfolio Segment |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Allowance reserve | 34,234 | 25,723
Subordinate Mortgage Portfolio Segment |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Allowance reserve | $ 1,085 | $ 759

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- Definition Allowance For Loan And Lease Losses Real Estate Liability Current Expected Credit Loss + References No definition available. + Details
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Namespace Prefix: | ari_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Unfunded commitments liability. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. + References No definition available. + Details
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Balance Type: | credit
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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-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC Reference 2: 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 + Details
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- Details
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- Details
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