CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Relationship with 9 Henmar LLC ("9 Hnamer") (Details) - 9 Henmar LLC [Member]	12 Months Ended
Dec. 31, 2015 Entity
Related Party Transaction [Line Items]
Percent of fees collected as payment to entity	10.00%
Trapeza entities [Member]
Related Party Transaction [Line Items]
Number of entities owned by entity and co-managing partner	4

Represents the number of entities pertaining to transaction owned by entity and co-managing partner and have incentive distribution, known as carried interests, that are subject to claw back provisions.

No definition available.

Name:	rexi_NumberOfEntitiesOwnedByEntityAndCoManagingPartner
Namespace Prefix:	rexi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration