STOCKHOLDERS' EQUITY (Details)	Dec. 31, 2015 vote
Stockholders' Equity Note [Abstract]
Number of votes to which holders of common shares are entitled for each share held	1

Represents the number of votes to which the holders of common stock are entitled for each share held.

No definition available.

Name:	ostk_NumberOfVotesPerCommonShareHeld
Namespace Prefix:	ostk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant