Organization and Business (Details) (Wellsford Real Properties [Member])	Sep. 30, 2012
Wellsford Real Properties [Member]
Organization and Business (Textual) [Abstract]
Percentage of ownership interest	23.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant