INVESTMENTS IN SERVICER ADVANCES - Summary of Investments in Servicer Advances - Components of Funded Advances (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 17, 2013
Investment [Line Items]
Total	$ 3,270,839		$ 2,665,551
Servicer Advance Joint Venture [Member]
Investment [Line Items]
Total	3,270,839	[1]	2,665,551	[1]	3,200,000
Servicer Advance Joint Venture [Member] | Servicer Advances [Member]
Investment [Line Items]
Principal and interest advances	729,713		1,516,715
Escrow advances (taxes and insurance advances)	1,600,713		934,525
Foreclosure advances	772,066		209,890
Total	$ 3,102,492	[2]	$ 2,661,130	[2]

[1] Carrying value represents the fair value of the investments in servicer advances, including the basic fee component of the related MSRs.

[2] The following types of advances comprise the investments in servicer advances: December 31, 2014 December 31, 2013Principal and interest advances$729,713 $1,516,715Escrow advances (taxes and insurance advances)1,600,713 934,525Foreclosure advances772,066 209,890 Total$3,102,492 $2,661,130