Capital of the Operating Partnership (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Limited Partners' Capital Account [Line Items]
Partnership units (in shares)		134,891,471
Common stock, shares outstanding (in shares)		127,454,354		126,904,085
ROIC
Limited Partners' Capital Account [Line Items]
ROIC ownership percentage in ROIP LP		94.50%
Common Stock
Limited Partners' Capital Account [Line Items]
Common stock, shares outstanding (in shares)		127,454,354	127,457,854	126,904,085	126,003,795	125,024,887	124,538,811
OP Units
Limited Partners' Capital Account [Line Items]
Non-controlling interest redemption value		$ 91.6
Redemption value (usd per share)		$ 12.32
Limited Partner’s Capital | Retail Opportunity Investments Partnership L.P.
Limited Partners' Capital Account [Line Items]
Partnership units (in shares)	[1]	7,437,117	7,437,117	7,437,117	7,437,117	8,447,117	8,447,117

[1] Consists of limited partnership interests held by third parties.