OTHER ASSETS AND LIABILITIES, GENERAL AND ADMINISTRATIVE, AND OTHER ITEMS - Schedule of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other income (loss), net
Unrealized gain (loss) on secured notes and bonds payable	$ 4,029	$ (5,611)	$ 5,245	$ 535
Unrealized gain (loss) on contingent consideration	(478)	(2,079)	(886)	(5,949)
Unrealized gain (loss) on equity investments	10,546	(4,716)	5,929	(52,413)
Gain (loss) on transfer of loans to REO	(699)	703	3,412	5,010
Gain (loss) on transfer of loans to other assets	(37)	(512)	(14)	(773)
Gain (loss) on Ocwen common stock	(489)	4,342	1,050	221
Provision for servicing losses	(3,347)	(3,734)	(26,148)	(19,764)
Bargain purchase gain	3,497	0	3,497	0
Rental and ancillary revenue	19,072	6,790	39,094	17,851
Property and maintenance revenue	28,755	16,837	73,765	45,495
Other income (loss)	(1,583)	(8,339)	(25,248)	(29,979)
Total other income (loss), net	$ 59,266	$ 3,681	$ 79,696	$ (39,766)