REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 38,380	$ 43,243	$ 118,317	$ 139,749
Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue	0	1,887	0	3,409
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	33,779	38,147	104,480	124,111
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	2,644	3,680	7,679	10,273
Revenue related to technology platforms and professional services | Corporate and Others
Disaggregation of Revenue [Line Items]
Revenue		1,887		3,409
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	1,957	1,416	6,158	5,365
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	30,866	26,793	91,349	89,584
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	26,387	23,785	77,947	77,898
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,633	1,782	7,654	6,832
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,846	1,226	5,748	4,854
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,514	14,563	26,968	46,756
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,392	14,362	26,533	46,213
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	11	11	25	32
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 111	$ 190	$ 410	$ 511