Name:	ostk_DeferredCompensationPlanNumberOfPlanYears
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Percentage of vesting of participant's contributions to a non qualified deferred compensation plan.

No definition available.

Name:	ostk_DeferredCompensationPlanVestingPercentage
Namespace Prefix:	ostk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The employer contribution as a percentage of the amount contributed by employee up to specified employee contribution that the employer may contribute to a defined contribution plan.

No definition available.

Name:	ostk_DefinedContributionPlanEmployerMatchUpToSpecifiedEmployeeContribution
Namespace Prefix:	ostk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period of vesting of employer's matching contributions to a defined contribution plan.

No definition available.

Name:	ostk_DefinedContributionPlanEmployerMatchingContributionVestingPeriod
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The minimum period that the individual is required to perform services in order to be fully vested under the 401(k) defined contribution plan.

No definition available.

Name:	ostk_DefinedContributionPlanMinimumRequisiteServicePeriod
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

This element represents the minimum age limit for participating in 401(k) defined contribution plan.

No definition available.

Name:	ostk_DefinedContributionPlanParticipantMinimumAge
Namespace Prefix:	ostk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_DeferredCompensationArrangementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 17
-Article 5

Name:	us-gaap_DeferredCompensationPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

No definition available.