EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to Altisource	$ 1,568	$ 9,035	$ (2,564)	$ 15,580
Weighted average common shares outstanding, basic (in shares)	17,142	18,335	17,260	18,497
Dilutive effect of stock options, restricted shares and restricted share units (in shares)	411	501	0	572
Weighted average common shares outstanding, diluted (in shares)	17,553	18,836	17,260	19,069
Earnings (loss) per share:
Basic (in usd per share)	$ 0.09	$ 0.49	$ (0.15)	$ 0.84
Diluted (in usd per share)	$ 0.09	$ 0.48	$ (0.15)	$ 0.82
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)	300	400	300	400
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	300	500	300
Options, restricted shares and restricted share units excluded due to net loss
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)			500

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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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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