EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2017	[1],[2]	Sep. 30, 2017	[1],[2]	Jun. 30, 2017	[1],[2]	Mar. 31, 2017	[1],[2]	Dec. 31, 2016	[2],[3],[4]	Sep. 30, 2016	[2],[3],[4]	Jun. 30, 2016	[2],[3],[4]	Mar. 31, 2016	[2],[3],[4]	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to Altisource	$ 286,350		$ 6,961		$ 9,035		$ 6,545		$ (20,384)		$ 10,589		$ 19,994		$ 18,494		$ 308,891	$ 28,693	$ 41,598
Weighted average common shares outstanding, basic	17,724		18,023		18,335		18,662		18,788		18,715		18,437		18,855		18,183	18,696	19,504
Dilutive effect of stock options and restricted shares																	509	916	1,115
Weighted average common shares outstanding, diluted	18,211		18,429		18,836		19,304		18,788		19,568		19,604		20,040		18,692	19,612	20,619
Earnings per share:
Basic (in dollars per share)	$ 16.16		$ 0.39		$ 0.49		$ 0.35		$ (1.08)		$ 0.57		$ 1.08		$ 0.98		$ 16.99	$ 1.53	$ 2.13
Diluted (in dollars per share)	$ 15.72		$ 0.38		$ 0.48		$ 0.34		$ (1.08)		$ 0.54		$ 1.02		$ 0.92		$ 16.53	$ 1.46	$ 2.02
Employee and non employee stock option
Anti-dilutive securities
Options and restricted shares excluded from the computation of diluted EPS (in shares)																	500	400	600
Options and restricted shares issuable upon achievement of market and performance criteria
Anti-dilutive securities
Options and restricted shares excluded from the computation of diluted EPS (in shares)																	400	400	300

[1] On December 27, 2017, two of the Company’s wholly-owned subsidiaries, Altisource Solutions S.à r.l. and Altisource Holdings S.à r.l., merged, with Altisource Holdings S.à r.l. as the surviving entity. Altisource Holdings S.à r.l. was subsequently renamed Altisource S.à r.l. The merger is part of a larger subsidiary restructuring plan designed to simplify the Company’s corporate structure, allow it to operate more efficiently and reduce administrative costs. For Luxembourg tax purposes, the merger was recognized at fair value and generated an NOL of $1.3 billion and a deferred tax asset, net of valuation allowance, of $300.9 million as of December 31, 2017. The NOL has a 17 year life. This deferred tax asset was partially offset by the impact of other changes in U.S. and Luxembourg income tax rates of $6.3 million and an increase in certain foreign income tax reserves (and related interest) of $10.5 million. See Note 21.

[2] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted average shares outstanding for each period.

[3] During the fourth quarter of 2016, Altisource recorded a litigation settlement loss of $32.0 million in connection with a litigation matter. Also during the fourth quarter of 2016, Altisource recorded an insurance recovery related to this litigation settlement of $4.0 million. See Note 19.

[4] We acquired Granite on July 29, 2016. See Note 5.