REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 39,461	$ 39,516
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	33,935	35,418
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	3,216	2,506
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	2,310	1,592
Servicer and Real Estate | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	31,945	28,536
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	26,553	24,659
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,208	2,498
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,184	1,379
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,516	10,980
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,382	10,759
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8	8
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 126	$ 213