Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated dividends in excess of earnings	Accumulated other comprehensive income (loss)	Non- controlling interests	Officer	Officer Accumulated dividends in excess of earnings	Officer Non- controlling interests
Balance (in shares) at Dec. 31, 2022		124,538,811
Balance at Dec. 31, 2022	$ 1,384,598	$ 12	$ 1,612,126	$ (315,984)	$ 14	$ 88,430
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)		697,691
Shares issued under the Equity Incentive Plan	32		32
Shares withheld for employee taxes (in shares)		(211,615)
Shares withheld for employee taxes	(3,181)		(3,181)
Stock based compensation expense	2,927		2,840			87
Adjustment to non-controlling interests ownership in Operating Partnership	0		343			(343)
Registration expenditures	(10)		(10)
Cash dividends	(20,020)			(18,753)		(1,267)	$ (143)	$ (91)	$ (52)
Net income attributable to Retail Opportunity Investments Corp.	8,142			8,142
Net income attributable to non-controlling interests	554					554
Other comprehensive income (loss)	(5)				(5)	0
Balance (in shares) at Mar. 31, 2023		125,024,887
Balance at Mar. 31, 2023	1,372,894	$ 12	1,612,150	(326,686)	9	87,409
Balance (in shares) at Dec. 31, 2022		124,538,811
Balance at Dec. 31, 2022	1,384,598	$ 12	1,612,126	(315,984)	14	88,430
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity redemption of OP Units	13,389
Net income attributable to Retail Opportunity Investments Corp.	26,499
Net income attributable to non-controlling interests	1,644
Balance (in shares) at Sep. 30, 2023		126,001,795
Balance at Sep. 30, 2023	1,359,905	$ 13	1,628,663	(346,260)	1,270	76,219
Balance (in shares) at Mar. 31, 2023		125,024,887
Balance at Mar. 31, 2023	1,372,894	$ 12	1,612,150	(326,686)	9	87,409
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)		1,000
Shares issued under the Equity Incentive Plan	0		0
Shares withheld for employee taxes (in shares)		(8,667)
Shares withheld for employee taxes	(110)		(110)
Cancellation of restricted stock (in shares)		(23,425)
Stock based compensation expense	3,430		2,761			669
Equity Redemption of OP Units (in shares)		1,010,000
Equity redemption of OP Units		$ 1	13,388			(13,389)
Adjustment to non-controlling interests ownership in Operating Partnership	0		(2,486)			2,486
Registration expenditures	(36)		(36)
Cash dividends	(20,015)			(18,899)		(1,116)	(156)	(99)	(57)
Net income attributable to Retail Opportunity Investments Corp.	9,929			9,929
Net income attributable to non-controlling interests	589					589
Other comprehensive income (loss)	1,406				1,328	78
Balance (in shares) at Jun. 30, 2023		126,003,795
Balance at Jun. 30, 2023	1,367,931	$ 13	1,625,667	(335,755)	1,337	76,669
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)		2,000
Shares issued under the Equity Incentive Plan	0		0
Cancellation of restricted stock (in shares)		(4,000)
Stock based compensation expense	3,225		2,696			529
Adjustment to non-controlling interests ownership in Operating Partnership			303			(303)
Registration expenditures	(3)		(3)
Cash dividends	(20,014)			(18,899)		(1,115)	(92)	(34)	(58)
Net income attributable to Retail Opportunity Investments Corp.	8,428			8,428
Net income attributable to non-controlling interests	501					501
Other comprehensive income (loss)	(71)				(67)	(4)
Balance (in shares) at Sep. 30, 2023		126,001,795
Balance at Sep. 30, 2023	$ 1,359,905	$ 13	1,628,663	(346,260)	1,270	76,219
Balance (in shares) at Dec. 31, 2023	126,904,085	126,904,085
Balance at Dec. 31, 2023	$ 1,363,207	$ 13	1,643,908	(357,160)	559	75,887
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)		810,507
Shares issued under the Equity Incentive Plan	0		0
Shares withheld for employee taxes (in shares)		(251,738)
Shares withheld for employee taxes	(3,532)		(3,532)
Cancellation of restricted stock (in shares)		(5,000)
Stock based compensation expense	2,787		1,861			926
Adjustment to non-controlling interests ownership in Operating Partnership	0		1,096			(1,096)
Registration expenditures	(33)		(33)
Cash dividends	(20,234)			(19,118)		(1,116)	(174)	(40)	(134)
Net income attributable to Retail Opportunity Investments Corp.	11,018			11,018
Net income attributable to non-controlling interests	647					647
Other comprehensive income (loss)	(40)				(38)	(2)
Balance (in shares) at Mar. 31, 2024		127,457,854
Balance at Mar. 31, 2024	$ 1,353,646	$ 13	1,643,300	(365,300)	521	75,112
Balance (in shares) at Dec. 31, 2023	126,904,085	126,904,085
Balance at Dec. 31, 2023	$ 1,363,207	$ 13	1,643,908	(357,160)	559	75,887
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity Redemption of OP Units (in shares)	1,194,516	1,194,516
Equity redemption of OP Units	$ 18,529
Net income attributable to Retail Opportunity Investments Corp.	50,512
Net income attributable to non-controlling interests	$ 2,877
Balance (in shares) at Sep. 30, 2024	128,648,870	128,648,870
Balance at Sep. 30, 2024	$ 1,360,773	$ 13	1,661,702	(364,322)	0	63,380
Balance (in shares) at Mar. 31, 2024		127,457,854
Balance at Mar. 31, 2024	1,353,646	$ 13	1,643,300	(365,300)	521	75,112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of restricted stock (in shares)		(3,500)
Stock based compensation expense	3,283		2,154			1,129
Adjustment to non-controlling interests ownership in Operating Partnership	0		849			(849)
Registration expenditures	(36)		(36)
Cash dividends	(20,232)			(19,117)		(1,115)	(157)	(40)	(117)
Net income attributable to Retail Opportunity Investments Corp.	7,366			7,366
Net income attributable to non-controlling interests	433					433
Other comprehensive income (loss)	(304)				(287)	(17)
Balance (in shares) at Jun. 30, 2024		127,454,354
Balance at Jun. 30, 2024	1,343,999	$ 13	1,646,267	(377,091)	234	74,576
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation expense	3,532		2,402			1,130
Equity Redemption of OP Units (in shares)		1,194,516
Equity redemption of OP Units			18,529			(18,529)
Adjustment to non-controlling interests ownership in Operating Partnership			(5,472)			5,472
Registration expenditures	(24)		(24)
Cash dividends	(20,234)			(19,297)		(937)	$ (177)	$ (62)	$ (115)
Net income attributable to Retail Opportunity Investments Corp.	32,128			32,128
Net income attributable to non-controlling interests	1,797					1,797
Other comprehensive income (loss)	$ (248)				(234)	(14)
Balance (in shares) at Sep. 30, 2024	128,648,870	128,648,870
Balance at Sep. 30, 2024	$ 1,360,773	$ 13	$ 1,661,702	$ (364,322)	$ 0	$ 63,380