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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 04, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	ARI
Entity Registrant Name	Apollo Commercial Real Estate Finance, Inc.
Entity Central Index Key	0001467760
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		36,883,467

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