EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
EARNINGS PER SHARE
Net income attributable to Altisource (in dollars)	$ 27,518	$ 25,229
Weighted-average common shares outstanding, basic	23,374,000	23,381,000
Dilutive effect of stock options (in shares)	1,684,000	1,463,000
Weighted-average common shares outstanding, diluted	25,058,000	24,844,000
Earnings per share
Basic (in dollars per share)	$ 1.18	$ 1.08
Diluted (in dollars per share)	$ 1.10	$ 1.02
Options
Anti-dilutive securities
Options excluded from the computation of diluted EPS (in shares)	100,000
Options | Maximum
Anti-dilutive securities
Options excluded from the computation of diluted EPS (in shares)		100,000
Options for shares issuable upon achievement of market and performance criteria
Anti-dilutive securities
Options excluded from the computation of diluted EPS (in shares)	100,000	400,000