INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Schedule of Past Due Information for Performing Loans (Footnote) (Details)	3 Months Ended
	Mar. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due	30 days
Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due	120 days
Lower Range [Member] | Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due	90 days
Upper Range [Member] | Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due	119 days