QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2017		Sep. 30, 2017	[1],[2]	Jun. 30, 2017	[1],[2]	Mar. 31, 2017	[1],[2]	Dec. 31, 2016		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
Operating loss carryforwards	$ 1,339,600								$ 17,300								$ 1,339,600	$ 17,300
Deferred tax assets, net	303,707								7,292								303,707	7,292
Income tax expense, adjustment of deferred tax asset																	6,300
Income tax expense, foreign income tax reserves																	10,500
Accrued litigation settlement	0								32,000								0	32,000
Litigation settlement insurance recovery	0								4,000								0	4,000
Revenue	216,066	[1],[2]	$ 234,979		$ 250,685		$ 240,483		238,627	[2],[3],[4]	$ 252,745		$ 255,799		$ 250,132		942,213	997,303	$ 1,051,466
Gross profit	54,445	[1],[2]	60,081		65,292		62,530		65,818	[2],[3],[4]	78,743		81,428		81,269		242,348	307,258	364,139
Income before income taxes and non-controlling interests	3,112	[1],[2]	10,357		12,160		9,746		(19,537)	[2],[3],[4]	18,796		23,977		21,085		35,375	44,321	53,060
Net income	286,983	[1],[2]	7,766		9,722		7,160		(19,664)	[2],[3],[4]	11,472		20,686		18,892		311,631	31,386	44,800
Net income attributable to Altisource	$ 286,350	[1],[2]	$ 6,961		$ 9,035		$ 6,545		$ (20,384)	[2],[3],[4]	$ 10,589		$ 19,994		$ 18,494		$ 308,891	$ 28,693	$ 41,598
Earnings per share:
Basic (in dollars per share)	$ 16.16	[1],[2]	$ 0.39		$ 0.49		$ 0.35		$ (1.08)	[2],[3],[4]	$ 0.57		$ 1.08		$ 0.98		$ 16.99	$ 1.53	$ 2.13
Diluted (in dollars per share)	$ 15.72	[1],[2]	$ 0.38		$ 0.48		$ 0.34		$ (1.08)	[2],[3],[4]	$ 0.54		$ 1.02		$ 0.92		$ 16.53	$ 1.46	$ 2.02
Weighted average shares outstanding:
Basic (in shares)	17,724	[1],[2]	18,023		18,335		18,662		18,788	[2],[3],[4]	18,715		18,437		18,855		18,183	18,696	19,504
Diluted (in shares)	18,211	[1],[2]	18,429		18,836		19,304		18,788	[2],[3],[4]	19,568		19,604		20,040		18,692	19,612	20,619
2017 Subsidiary Merger
Operating loss carryforwards	$ 1,300,000																$ 1,300,000
Deferred tax assets, net	$ 300,900																$ 300,900
Operating loss carryforwards, term																	17 years

[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.