Organization, Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation Between Basic and Diluted EPS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income	$ 11,665	$ 8,696
Less income attributable to non-controlling interests	(647)	(554)
Less earnings allocated to participating securities	(130)	(120)
Net income available for common stockholders, basic	10,888	8,022
Less earnings allocated to participating securities	(130)	(120)
Net income available for common stockholders, diluted	$ 11,535	$ 8,576
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)	126,593,414	124,227,368
Denominator for diluted EPS – weighted average common equivalent shares (in shares)	134,261,653	133,007,419
Retail Opportunity Investments Partnership L.P.
Numerator:
Net income	$ 11,665	$ 8,696
Less earnings allocated to participating securities	(130)	(120)
Net income available for common stockholders, basic	11,535	8,576
Net income available for common stockholders, diluted	$ 11,535	$ 8,576
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)	134,030,531	132,674,485
Denominator for diluted EPS – weighted average common equivalent shares (in shares)	134,261,653	133,007,419
OP Units
Denominator:
OP Units (in shares)	7,437,117	8,447,117
Performance-based restricted stock awards and LTIP Units
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)	231,122	332,934
Performance-based restricted stock awards and LTIP Units | Retail Opportunity Investments Partnership L.P.
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)	231,122	332,934