Mortgage Notes Payable, Credit Facilities and Senior Notes - Narrative (Details)		3 Months Ended	9 Months Ended
	Mar. 02, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 21, 2023 USD ($)	Dec. 20, 2019 credit_facility_extension	Nov. 10, 2017 USD ($)	Jul. 26, 2016 USD ($)	Dec. 03, 2014 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 600,000,000.0
Number of extension options \| credit_facility_extension						2
Extension term	6 months
Commitment fee (percentage)			0.20%
Fronting fee (percentage)		0.125%	0.125%
Credit facility		$ 135,000,000.0	$ 135,000,000.0	$ 75,000,000.0
Net unamortized deferred financing costs		$ 3,800,000	$ 3,800,000	5,000,000.0
Line of credit facility, interest rate during the period (percentage)		6.30%	6.30%
Remaining borrowing capacity		$ 465,000,000.0	$ 465,000,000.0
Revolving Credit Facility \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.50%
Revolving Credit Facility \| Adjusted Term SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	1.00%
Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount		150,000	150,000
Senior Notes
Debt Instrument [Line Items]
Principal amount		1,050,000,000	1,050,000,000	1,050,000,000
Net unamortized deferred financing costs		3,509,000	3,509,000	4,374,000
Term Loan Agreement
Debt Instrument [Line Items]
Principal amount	$ 300,000,000.0	200,000,000	200,000,000	200,000,000
Additional borrowing capacity	$ 200,000,000.0
Variable rate (percentage)	1.00%
Net unamortized deferred financing costs		$ 73,000	$ 73,000	$ 255,000
Interest rate during period (percentage)		6.40%	6.40%
Remaining borrowing capacity		$ 0	$ 0
Term Loan Agreement \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.50%
Term Loan Agreement \| SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	0.10%
Term Loan Agreement \| Base Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.00%
Term Loan Agreement \| Adjusted Term SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	1.00%
Credit facility including accordion feature \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,200,000,000
Senior Notes Due 2028 \| Senior Notes
Debt Instrument [Line Items]
Principal amount					$ 350,000,000
Debt Instrument, Interest Rate, Stated Percentage					6.75%
Senior Notes Due 2027 \| Senior Notes
Debt Instrument [Line Items]
Principal amount							$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage							4.19%
Senior Notes Due 2026 \| Senior Notes
Debt Instrument [Line Items]
Principal amount								$ 200,000,000
Debt Instrument, Interest Rate, Stated Percentage								3.95%
Senior Notes Due 2024 \| Senior Notes
Debt Instrument [Line Items]
Principal amount									$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage									4.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate (percentage)	0.85%
Revolving Credit Facility \| SOFR
Debt Instrument [Line Items]
Variable rate (percentage)	0.10%
Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Variable rate (percentage)	0.00%

RETAIL OPPORTUNITY INVESTMENTS CORP 10-Q