EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income attributable to Altisource	$ 8,667	$ 6,961	$ 6,103	$ 22,541
Weighted average common shares outstanding, basic (in shares)	17,033	18,023	17,184	18,337
Dilutive effect of stock options, restricted shares and restricted share units (in shares)	542	406	485	517
Weighted average common shares outstanding, diluted (in shares)	17,575	18,429	17,669	18,854
Earnings per share:
Basic (in usd per share)	$ 0.51	$ 0.39	$ 0.36	$ 1.23
Diluted (in usd per share)	$ 0.49	$ 0.38	$ 0.35	$ 1.20
Employee and non-employee stock options
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	100	900	300	500
Options, restricted shares and restricted share units issuable upon achievement of market and performance criteria
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	500	400	500	300

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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