INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS - Narrative (Details)	6 Months Ended
Jun. 30, 2017
Excess MSRs Investees [Member] \| Mortgage Servicing Rights [Member]
Investment [Line Items]
Weighted average discount rate, used to value investments in excess MSRs	9.70%

The average discount rate applied to insurance contracts to determine future policy benefits to be paid to or on behalf of policyholders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65670685&loc=d3e14881-158438

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