BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact on Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	$ 36,466		$ 52,740
Total current assets	201,534		271,641
Total assets	741,700		865,164
Deferred revenue	10,108		9,802
Other current liabilities	7,030		9,414
Total current liabilities	104,378		109,561
Other non-current liabilities	9,178		12,282
Retained earnings	590,655		626,600
Altisource equity	295,431		338,612
Total equity	296,668		339,985	$ 62,194	$ 52,270
Total liabilities and equity	741,700		$ 865,164
Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	36,011
Total current assets	201,079
Total assets	741,245
Deferred revenue	8,597
Other current liabilities	3,540
Total current liabilities	99,377
Other non-current liabilities	9,446
Retained earnings	594,932
Altisource equity	299,708
Total equity	300,945
Total liabilities and equity	741,245
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	(455)
Total current assets	(455)
Total assets	(455)
Deferred revenue	(1,511)
Other current liabilities	(3,490)	$ 300
Total current liabilities	(5,001)
Other non-current liabilities	269
Retained earnings	4,277	$ (10,400)
Altisource equity	4,277
Total equity	4,277
Total liabilities and equity	$ (455)