REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 40,421	$ 46,041	$ 79,937	$ 96,506
Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue	0	965	0	1,522
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	35,283	40,712	70,701	85,963
Revenue recognized when services are performed or assets are sold | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		0		0
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	2,529	3,393	5,035	6,594
Revenue related to technology platforms and professional services | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		965		1,522
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	2,609	1,936	4,201	3,949
Reimbursable expenses revenue | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		0		0
Servicer and Real Estate | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	31,947	30,150	60,483	62,791
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	26,901	26,067	51,560	54,112
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,523	2,420	5,021	5,051
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,523	1,663	3,902	3,628
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8,474	14,926	19,454	32,193
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8,382	14,645	19,141	31,851
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	6	8	14	21
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 86	$ 273	$ 299	$ 321