REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 39,516	$ 50,465
Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		557
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	35,418	45,251
Revenue recognized when services are performed or assets are sold | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		0
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	2,506	3,201
Revenue related to technology platforms and professional services | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		557
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	1,592	2,013
Reimbursable expenses revenue | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		0
Servicer and Real Estate | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	28,536	32,641
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	24,659	28,045
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,498	2,631
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,379	1,965
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	10,980	17,267
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	10,759	17,206
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8	13
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 213	$ 48