INVESTMENTS IN SERVICER ADVANCES - Summary of Investments in Servicer Advances (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Investments in and Advances to Affiliates [Line Items]
Carrying Value	$ 3,245,457			$ 3,270,839
Servicer Advance Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Amortized Cost Basis	3,168,909			3,186,622
Carrying Value	3,245,457	[1]		3,270,839	[1]
Weighted Average Discount Rate	5.40%			5.40%
Weighted Average Life (Years)	3 years 11 months 10 days	[2]		4 years	[2]
Changes in Fair Value Recorded in Other Income	$ (7,669)		$ 0

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

[2] Weighted Average Life represents the weighted average expected timing of the receipt of expected net cash flows for this investment.