XML 53 R43.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Debt Securities - Overall Statistics for Company's AAA-Rated CMBS Investments Calculated on Weighted Average Basis (Detail) - Commercial Mortgage Backed Securities [Member] | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items] |  |
Coupon | 5.90% | 5.90%
Yield | 6.60% | 6.50%
Weighted Average Life | 1 year 4 months 24 days | 1 year 7 months 6 days

X
- Definition Available-for-sale Debt Securities, Weighted Average Discount Rate + References No definition available. + Details
Name: | ari_AvailableforsaleDebtSecuritiesWeightedAverageDiscountRate
Namespace Prefix: | ari_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available-for-sale Debt Securities, Weighted Average Expected Term + References No definition available. + Details
Name: | ari_AvailableforsaleDebtSecuritiesWeightedAverageExpectedTerm
Namespace Prefix: | ari_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available-for-sale Debt Securities, Weighted Average Interest Rate + References No definition available. + Details
Name: | ari_AvailableforsaleDebtSecuritiesWeightedAverageInterestRate
Namespace Prefix: | ari_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |