INVESTMENTS IN SERVICER ADVANCES - Summary of Investments in Servicer Advances - Components of Funded Advances (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Investment [Line Items]
Total	$ 3,245,457		$ 3,270,839
Servicer Advance Joint Venture [Member]
Investment [Line Items]
Total	3,245,457	[1]	3,270,839	[1]
Servicer Advance Joint Venture [Member] | Servicer Advances [Member]
Investment [Line Items]
Principal and interest advances	737,845		729,713
Escrow advances (taxes and insurance advances)	1,514,848		1,600,713
Foreclosure advances	815,613		772,066
Total	$ 3,068,306	[2]	$ 3,102,492	[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: March 31, 2015December 31, 2014Principal and interest advances$737,845$729,713Escrow advances (taxes and insurance advances)1,514,8481,600,713Foreclosure advances815,613772,066 Total$3,068,306$3,102,492