Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Overall Statistics for Loan Portfolio (Parenthetical) (Details)	Dec. 31, 2025
Receivables [Abstract]
Interest rate used in calculating weighted-average cash coupon for non-accrual or cost recovery loans	0.00%

Financing Receivable, Nonaccrual Or Cost Recovery Loans, Weighted Average Interest Rate

No definition available.

Name:	ari_FinancingReceivableNonaccrualOrCostRecoveryLoansWeightedAverageInterestRate
Namespace Prefix:	ari_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant