INVESTMENTS IN SERVICER ADVANCES - Summary of Investments in Servicer Advances - Components of Funded Advances (Details) - USD ($) $ in Thousands		Sep. 30, 2015		Dec. 31, 2014
Investment [Line Items]
Total		$ 7,499,775		$ 3,270,839
Servicer Advance Joint Venture [Member]
Investment [Line Items]
Total	[1]	7,499,775	[2]	3,270,839
Servicer Advance Joint Venture [Member] | Servicer Advances [Member]
Investment [Line Items]
Principal and interest advances		2,376,186		729,713
Escrow advances (taxes and insurance advances)		3,653,320		1,600,713
Foreclosure advances		1,614,929		772,066
Total	[3]	$ 7,644,435		$ 3,102,492

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

[2] Excludes an asset-backed security collateralized by servicer advances purchased during the third quarter of 2015. This security had a face amount of $122.0 million and was purchased for $122.0 million. See Note 7 for details related to this security.

[3] The following types of advances comprise the investments in servicer advances: September 30, 2015December 31, 2014Principal and interest advances$2,376,186$729,713Escrow advances (taxes and insurance advances)3,653,3201,600,713Foreclosure advances1,614,929772,066Total$7,644,435 $3,102,492