Consolidated Statements of Partners' Capital - USD ($) $ in Thousands		Total	Retail Opportunity Investments Partnership L.P.	Retail Opportunity Investments Partnership L.P. Officer	Retail Opportunity Investments Partnership L.P. Limited Partner’s Capital		Retail Opportunity Investments Partnership L.P. Limited Partner’s Capital Officer	[1]	Retail Opportunity Investments Partnership L.P. ROIC Capital		Retail Opportunity Investments Partnership L.P. ROIC Capital Officer	[2]	Retail Opportunity Investments Partnership L.P. Accumulated other comprehensive income (loss)
Balance (in shares) at Dec. 31, 2022					8,447,117	[1]			124,538,811	[2]
Balance at Dec. 31, 2022			$ 1,384,598		$ 88,429	[1]			$ 1,296,154	[2]			$ 15
Increase (Decrease) in Partners' Capital [Roll Forward]
OP units issued under the Equity Incentive Plan (in shares)	[2]								697,691
OP Units issued under the Equity Incentive Plan		$ 32	32						$ 32	[2]
OP Units withheld for employee taxes (in shares)	[2]								(211,615)
OP Units withheld for employee taxes		(3,181)	(3,181)						$ (3,181)	[2]
Stock based compensation expense		2,927	2,927		87	[1]			2,840	[2]
Adjustment to non-controlling interests ownership in Operating Partnership		0	0		(343)	[1]			343	[2]
Registration expenditures		(10)	(10)						(10)	[2]
Cash distributions			(20,020)	$ (143)	(1,267)	[1]	$ (52)		(18,753)	[2]	$ (91)
Net income attributable to Retail Opportunity Investments Partnership, LP			8,696		$ 554	[1]			$ 8,142	[2]
Other comprehensive income (loss)		(5)	(5)										(5)
Balance (in shares) at Mar. 31, 2023					8,447,117	[1]			125,024,887	[2]
Balance at Mar. 31, 2023			1,372,894		$ 87,408	[1]			$ 1,285,476	[2]			10
Balance (in shares) at Dec. 31, 2022					8,447,117	[1]			124,538,811	[2]
Balance at Dec. 31, 2022			1,384,598		$ 88,429	[1]			$ 1,296,154	[2]			15
Increase (Decrease) in Partners' Capital [Roll Forward]
Equity redemption of OP Units		13,389	13,389
Net income attributable to Retail Opportunity Investments Partnership, LP		28,143	28,143
Balance (in shares) at Sep. 30, 2023					7,437,117	[1]			126,001,795	[2]
Balance at Sep. 30, 2023			1,359,905		$ 76,144	[1]			$ 1,282,416	[2]			1,345
Balance (in shares) at Mar. 31, 2023					8,447,117	[1]			125,024,887	[2]
Balance at Mar. 31, 2023			1,372,894		$ 87,408	[1]			$ 1,285,476	[2]			10
Increase (Decrease) in Partners' Capital [Roll Forward]
OP units issued under the Equity Incentive Plan (in shares)	[2]								1,000
OP Units issued under the Equity Incentive Plan		0	0						$ 0	[2]
OP Units withheld for employee taxes (in shares)	[2]								(8,667)
OP Units withheld for employee taxes		(110)	(110)						$ (110)	[2]
Cancellation of OP Units (in shares)	[2]								(23,425)
Stock based compensation expense		3,430	3,430		$ 669	[1]			$ 2,761	[2]
Equity Redemption of OP Units (in shares)					(1,010,000)	[1]			1,010,000	[2]
Equity redemption of OP Units			0		$ (13,389)	[1]			$ 13,389	[2]
Adjustment to non-controlling interests ownership in Operating Partnership		0	0		2,486	[1]			(2,486)	[2]
Registration expenditures		(36)	(36)						(36)	[2]
Cash distributions			(20,015)	(156)	(1,116)	[1]	(57)		(18,899)	[2]	(99)
Net income attributable to Retail Opportunity Investments Partnership, LP			10,518		$ 589	[1]			$ 9,929	[2]
Other comprehensive income (loss)		1,406	1,406										1,406
Balance (in shares) at Jun. 30, 2023					7,437,117	[1]			126,003,795	[2]
Balance at Jun. 30, 2023			1,367,931		$ 76,590	[1]			$ 1,289,925	[2]			1,416
Increase (Decrease) in Partners' Capital [Roll Forward]
OP units issued under the Equity Incentive Plan (in shares)									2,000
OP Units issued under the Equity Incentive Plan		0	0						$ 0
Cancellation of OP Units (in shares)	[2]								(4,000)
Stock based compensation expense		3,225	3,225		529	[1]			$ 2,696	[2]
Adjustment to non-controlling interests ownership in Operating Partnership					(303)	[1]			303	[2]
Registration expenditures		(3)	(3)						(3)	[2]
Cash distributions			(20,014)	(92)	(1,115)	[1]	(58)		(18,899)	[2]	(34)
Net income attributable to Retail Opportunity Investments Partnership, LP		8,929	8,929		$ 501	[1]			$ 8,428	[2]
Other comprehensive income (loss)		(71)	(71)										(71)
Balance (in shares) at Sep. 30, 2023					7,437,117	[1]			126,001,795	[2]
Balance at Sep. 30, 2023			1,359,905		$ 76,144	[1]			$ 1,282,416	[2]			1,345
Balance (in shares) at Dec. 31, 2023					7,437,117	[1]			126,904,085	[2]
Balance at Dec. 31, 2023			1,363,207		$ 75,854	[1]			$ 1,286,761	[2]			592
Increase (Decrease) in Partners' Capital [Roll Forward]
OP units issued under the Equity Incentive Plan (in shares)	[2]								810,507
OP Units issued under the Equity Incentive Plan		0
OP Units withheld for employee taxes (in shares)	[2]								(251,738)
OP Units withheld for employee taxes		(3,532)	(3,532)						$ (3,532)	[2]
Cancellation of OP Units (in shares)	[2]								(5,000)
Stock based compensation expense		2,787	2,787		926	[1]			$ 1,861	[2]
Adjustment to non-controlling interests ownership in Operating Partnership		0	0		(1,096)	[1]			1,096	[2]
Registration expenditures		(33)	(33)						(33)	[2]
Cash distributions			(20,234)	(174)	(1,116)	[1]	(134)		(19,118)	[2]	(40)
Net income attributable to Retail Opportunity Investments Partnership, LP			11,665		$ 647	[1]			$ 11,018	[2]
Other comprehensive income (loss)		$ (40)	(40)										(40)
Balance (in shares) at Mar. 31, 2024					7,437,117	[1]			127,457,854	[2]
Balance at Mar. 31, 2024			1,353,646		$ 75,081	[1]			$ 1,278,013	[2]			552
Balance (in shares) at Dec. 31, 2023					7,437,117	[1]			126,904,085	[2]
Balance at Dec. 31, 2023			1,363,207		$ 75,854	[1]			$ 1,286,761	[2]			592
Increase (Decrease) in Partners' Capital [Roll Forward]
Equity Redemption of OP Units (in shares)		1,194,516
Equity redemption of OP Units		$ 18,529	18,529
Net income attributable to Retail Opportunity Investments Partnership, LP		$ 53,389	53,389
Balance (in shares) at Sep. 30, 2024		134,891,471			6,242,601	[1]			128,648,870	[2]
Balance at Sep. 30, 2024			1,360,773		$ 63,380	[1]			$ 1,297,393	[2]			0
Balance (in shares) at Mar. 31, 2024					7,437,117	[1]			127,457,854	[2]
Balance at Mar. 31, 2024			1,353,646		$ 75,081	[1]			$ 1,278,013	[2]			552
Increase (Decrease) in Partners' Capital [Roll Forward]
Cancellation of OP Units (in shares)	[2]								(3,500)
Stock based compensation expense		$ 3,283	3,283		1,129	[1]			$ 2,154	[2]
Adjustment to non-controlling interests ownership in Operating Partnership		0	0		(849)	[1]			849	[2]
Registration expenditures		(36)	(36)						(36)	[2]
Cash distributions			(20,232)	(157)	(1,115)	[1]	(117)		(19,117)	[2]	(40)
Net income attributable to Retail Opportunity Investments Partnership, LP			7,799		$ 433	[1]			$ 7,366	[2]
Other comprehensive income (loss)		(304)	(304)										(304)
Balance (in shares) at Jun. 30, 2024					7,437,117	[1]			127,454,354	[2]
Balance at Jun. 30, 2024			1,343,999		$ 74,562	[1]			$ 1,269,189	[2]			248
Increase (Decrease) in Partners' Capital [Roll Forward]
Stock based compensation expense		3,532	3,532		$ 1,130	[1]			$ 2,402	[2]
Equity Redemption of OP Units (in shares)					(1,194,516)	[1]			1,194,516
Equity redemption of OP Units					$ (18,529)				$ 18,529
Adjustment to non-controlling interests ownership in Operating Partnership					5,472	[1]			(5,472)	[2]
Registration expenditures		(24)	(24)						(24)	[2]
Cash distributions			(20,234)	$ (177)	(937)	[1]	$ (115)		(19,297)	[2]	$ (62)
Net income attributable to Retail Opportunity Investments Partnership, LP		33,925	33,925		$ 1,797	[1]			$ 32,128	[2]
Other comprehensive income (loss)		$ (248)	(248)										(248)
Balance (in shares) at Sep. 30, 2024		134,891,471			6,242,601	[1]			128,648,870	[2]
Balance at Sep. 30, 2024			$ 1,360,773		$ 63,380	[1]			$ 1,297,393	[2]			$ 0

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

[2] Consists of general and limited partnership interests held by ROIC.