Real Estate Investments - Operating Results Included For Property Assets Acquired (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2024
Real Estate [Abstract]
Revenues	$ 1,572	$ 1,572
Net income attributable to Retail Opportunity Investments Corp.	$ 191	$ 191

Asset Acquisition, Net Income (Loss) Attributable to Parent, Total

No definition available.

Name:	roic_AssetAcquisitionNetIncomeLossAttributableToParentTotal
Namespace Prefix:	roic_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration