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, 2021		122,685,266
Balance at Dec. 31, 2021	$ 1,366,353	$ 12	$ 1,577,837	$ (297,801)	$ (3,154)	$ 89,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)		406,106
Shares issued under the Equity Incentive Plan	302		302
Shares withheld for employee taxes (in shares)		(122,658)
Shares withheld for employee taxes	(2,405)		(2,405)
Cancellation of restricted stock (in shares)		(10,649)
Stock based compensation expense	2,572		2,572			0
Equity Redemption of OP Units (in shares)		50,000
Redemption of OP Units			978			(978)
Adjustment to non-controlling interests ownership in Operating Partnership	0		(2,668)			2,668
Proceeds from the issuance of common stock, Shares		724,279
Proceeds from the issuance of common stock	14,211	$ 0	14,211
Registration expenditures	(172)		(172)
Cash dividends	(17,139)			(16,009)		(1,130)	$ (110)	$ (110)	$ 0
Net income attributable to Retail Opportunity Investments Corp.	11,641			11,641
Net income attributable to non-controlling interests	825					825
Other comprehensive income (loss)	2,203				2,059	144
Balance (in shares) at Mar. 31, 2022		123,732,344
Balance at Mar. 31, 2022	1,378,281	$ 12	1,590,655	(302,279)	(1,095)	90,988
Balance (in shares) at Dec. 31, 2021		122,685,266
Balance at Dec. 31, 2021	1,366,353	$ 12	1,577,837	(297,801)	(3,154)	89,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of OP Units	1,895
Net income attributable to Retail Opportunity Investments Corp.	23,148
Net income attributable to non-controlling interests	1,632
Balance (in shares) at Jun. 30, 2022		124,341,618
Balance at Jun. 30, 2022	1,388,224	$ 12	1,604,495	(307,039)	(5)	90,761
Balance (in shares) at Mar. 31, 2022		123,732,344
Balance at Mar. 31, 2022	1,378,281	$ 12	1,590,655	(302,279)	(1,095)	90,988
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of restricted stock (in shares)		(1,500)
Stock based compensation expense	3,028		3,028			0
Equity Redemption of OP Units (in shares)		46,840
Redemption of OP Units			917			(917)
Adjustment to non-controlling interests ownership in Operating Partnership	0		(932)			932
Proceeds from the issuance of common stock, Shares		563,934
Proceeds from the issuance of common stock	10,988		10,988
Registration expenditures	(161)		(161)
Cash dividends	(17,290)			(16,164)		(1,126)	(103)	(103)	0
Net income attributable to Retail Opportunity Investments Corp.	11,507			11,507
Net income attributable to non-controlling interests	807					807
Other comprehensive income (loss)	1,167				1,090	77
Balance (in shares) at Jun. 30, 2022		124,341,618
Balance at Jun. 30, 2022	$ 1,388,224	$ 12	1,604,495	(307,039)	(5)	90,761
Balance (in shares) at Dec. 31, 2022	124,538,811	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	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 (in shares)	1,010,000	1,010,000
Redemption of OP Units	$ 13,389
Net income attributable to Retail Opportunity Investments Corp.	18,071
Net income attributable to non-controlling interests	$ 1,143
Balance (in shares) at Jun. 30, 2023	126,003,795	126,003,795
Balance at Jun. 30, 2023	$ 1,367,931	$ 13	1,625,667	(335,755)	1,337	76,669
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
Redemption of OP Units	0	$ 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	126,003,795
Balance at Jun. 30, 2023	$ 1,367,931	$ 13	$ 1,625,667	$ (335,755)	$ 1,337	$ 76,669