OTHER ASSETS AND LIABILITIES, GENERAL AND ADMINISTRATIVE, AND OTHER ITEMS - Schedule of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other income (loss), net
Unrealized gain (loss) on secured notes and bonds payable	$ (4,422)	$ 17,002
Unrealized gain (loss) on contingent consideration	(408)	(1,614)
Unrealized gain (loss) on equity investments	(2,783)	(45,023)
Gain (loss) on transfer of loans to REO	1,321	2,595
Gain (loss) on transfer of loans to other assets	(21)	(241)
Gain (loss) on Ocwen common stock	(186)	(5,050)
Provision for servicing losses	(6,158)	(4,781)
Rental and ancillary revenue	5,827	6,260
Property and maintenance revenue	19,906	13,347
Other income (loss)	(36,396)	(19,285)
Total other income (loss), net	$ (23,320)	$ (36,790)