Line of Credit, Covenant, Minimum Shareholder's Equity of Gross Capital Proceeds

No definition available.

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- Definition

Line of Credit, Covenant Terms, Temporary Waiver Term

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Available Future Borrowing Capacity Increase

+ References

No definition available.

+ Details

Name:	ari_LineofCreditFacilityAvailableFutureBorrowingCapacityIncrease
Namespace Prefix:	ari_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line of Credit Facility, Borrowing Margin Ratio

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Covenant Terms, Consolidated Recourse Indebtedness

+ References

No definition available.

+ Details

Name:	ari_LineofCreditFacilityCovenantTermsConsolidatedRecourseIndebtedness
Namespace Prefix:	ari_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Covenant Terms, Total Recourse Indebtedness, Percent

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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- Details

Name:	us-gaap_DebtInstrumentLineItems
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- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
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Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Balance Type:	credit
Period Type:	instant

Borrowings Under Repurchase Agreements - Additional Information (Detail) (Line of Credit [Member], USD $)	6 Months Ended	12 Months Ended		6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	1 Months Ended		6 Months Ended	1 Months Ended				0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Apr. 30, 2014 Deutsche Bank AG [Member]	Jun. 30, 2014 JP Morgan Chase [Member]	Dec. 31, 2013 JP Morgan Chase [Member]	Jun. 30, 2014 Wells Fargo [Member]	Dec. 31, 2013 Wells Fargo [Member]	Apr. 30, 2014 Minimum [Member] Deutsche Bank AG [Member] Three Month LIBOR [Member]	Apr. 30, 2014 DB Facility [Member] Deutsche Bank AG [Member]	Jun. 30, 2014 DB Facility [Member] Deutsche Bank AG [Member]	Apr. 30, 2014 DB Facility [Member] Minimum [Member] Deutsche Bank AG [Member]	Apr. 30, 2014 DB Facility [Member] Maximum [Member] Deutsche Bank AG [Member]	Apr. 30, 2014 DB Facility [Member] Maximum [Member] Deutsche Bank AG [Member] Three Month LIBOR [Member]	May 31, 2014 Amended DB Facility [Member] Deutsche Bank AG [Member]	Apr. 25, 2014 JP Morgan Facility [Member] JP Morgan Chase [Member]	Jun. 06, 2014 JP Morgan Facility [Member] JP Morgan Chase [Member]	May 22, 2014 JP Morgan Facility [Member] JP Morgan Chase [Member]	May 09, 2014 JP Morgan Facility [Member] JP Morgan Chase [Member]	Apr. 25, 2014 JP Morgan Facility [Member] Maximum [Member] JP Morgan Chase [Member]	Jun. 06, 2014 JP Morgan Amendment Letter [Member] JP Morgan Chase [Member]	May 22, 2014 JP Morgan Amendment Letter [Member] JP Morgan Chase [Member]	May 09, 2014 JP Morgan Amendment Letter [Member] JP Morgan Chase [Member]	Jun. 12, 2014 JP Morgan, Third Amendment and Restatement [Member] JP Morgan Chase [Member]
Debt Instrument [Line Items]
Maximum borrowing under facility			$ 100,000,000											$ 200,000,000		$ 100,000,000	$ 100,000,000	$ 100,000,000		$ 146,814,000	$ 146,814,000	$ 146,814,000	$ 175,000,000
Borrowing capacity increase, amount														100,000,000
Expiration period	2 years 8 months 12 days	3 years 3 months 12 days		7 months 6 days	1 year 1 month 6 days	8 months 12 days	2 months 12 days		4 years
Basis point								1.80%					2.32%
Margin ratio											125.00%	181.82%
Line of credit facility, covenant terms, minimum shareholder's equity of gross capital proceeds (percentage)										50.00%
Temporary waiver term															30 days
Line of credit facility, covenant terms, total consolidated indebtedness, percent																			10.00%				5.00%
Line of credit facility, covenant terms, total consolidated indebtedness, amount																			$ 12,500,000				$ 15,000,000