Consolidated Statement 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)
Total (in shares)					11,477,041	[1]			113,992,837	[2]
Balance (in shares) at Dec. 31, 2018					11,477,041	[1]			113,992,837	[2]
Balance at Dec. 31, 2018			$ 1,308,428		$ 120,214	[1]			$ 1,184,653	[2]			$ 3,561
OP Units issued under the Equity Incentive Plan (in shares)	[2]								631,022
OP Units issued under the Equity Incentive Plan		$ 1,942	1,942						$ 1,942	[2]
OP Units withheld for employee taxes (in shares)	[2]								(125,072)
OP Units withheld for employee taxes		(1,986)	(1,986)						$ (1,986)	[2]
Cancellation of OP Units (in shares)	[2]								(6,997)
Stock based compensation expense		8,567	8,567		$ 1,215	[1]			$ 7,352	[2]
Equity Redemption of OP Units (in shares)					143,190	[1]			143,190	[2]
Equity Redemption of OP Units					$ (2,632)	[1]			$ 2,632	[2]
Cash redemption of OP Units (in shares)	[1]				(282,761)
Cash redemption of OP Units		(5,043)	(5,043)		$ (5,043)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership			0		2,983	[1]			$ (2,983)	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]								1,861,036
Issuance of OP Units in connection with common stock offering		34,162	34,162						$ 34,162	[2]
Registration expenditures		(732)	(732)						(732)	[2]
Cash distributions			(99,470)	$ (30)	(8,921)	[1]	$ (175)		(90,549)	[2]	$ 145
Net income		53,683	53,683		$ 4,839	[1]			$ 48,844	[2]
Other comprehensive income (loss)		(7,693)	(7,693)										(7,693)
Balance (in shares) at Dec. 31, 2019					11,051,090	[1]			116,496,016	[2]
Balance at Dec. 31, 2019			1,291,828		$ 112,480	[1]			$ 1,183,480	[2]			(4,132)
Total (in shares)					11,051,090	[1]			116,496,016	[2]
OP Units issued under the Equity Incentive Plan (in shares)	[2]								428,170
OP Units issued under the Equity Incentive Plan		0	0						$ 0	[2]
OP Units withheld for employee taxes (in shares)	[2]								(128,614)
OP Units withheld for employee taxes		(2,272)	(2,272)						$ (2,272)	[2]
Cancellation of OP Units (in shares)	[2]								(4,899)
Stock based compensation expense		8,914	8,914		$ 816	[1]			$ 8,098	[2]
Equity Redemption of OP Units (in shares)					1,968,350	[1]			1,968,350	[2]
Equity Redemption of OP Units					$ (20,098)	[1]			$ 20,098	[2]
Cash redemption of OP Units (in shares)	[1]				(116,657)
Cash redemption of OP Units		(1,999)	(1,999)		$ (1,999)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership		0	0		570	[1]			$ (570)	[2]
Repurchase of OP Units (in shares)	[2]								(673,868)
Repurchase of OP Units			(8,846)						$ (8,846)	[2]
Registration expenditures		(312)	(312)						(312)	[2]
Cash distributions			(25,460)	(62)	(2,187)	[1]	(10)		(23,273)	[2]	(52)
Net income		34,721	34,721		$ 2,707	[1]			$ 32,014	[2]
Other comprehensive income (loss)		(5,353)	(5,353)										(5,353)
Balance (in shares) at Dec. 31, 2020					8,966,083	[1]			118,085,155	[2]
Balance at Dec. 31, 2020			1,291,159		$ 92,279	[1]			$ 1,208,365	[2]			(9,485)
Total (in shares)					8,966,083	[1]			118,085,155	[2]
OP Units issued under the Equity Incentive Plan (in shares)	[2]								535,819
OP Units issued under the Equity Incentive Plan		428	428						$ 428	[2]
OP Units withheld for employee taxes (in shares)	[2]								(142,247)
OP Units withheld for employee taxes		(1,905)	(1,905)						$ (1,905)	[2]
Cancellation of OP Units (in shares)	[2]								(5,482)
Stock based compensation expense		$ 11,030	11,030		$ 1,295	[1]			$ 9,735	[2]
Equity Redemption of OP Units (in shares)		423,986			423,986	[1]			423,986	[2]
Equity Redemption of OP Units					$ (6,858)	[1]			$ 6,858	[2]
Adjustment to non-controlling interests ownership in Operating Partnership		$ 0	0		3,625	[1]			$ (3,625)	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]								3,788,035
Issuance of OP Units in connection with common stock offering		69,602	69,602						$ 69,602	[2]
Registration expenditures		(918)	(918)						(918)	[2]
Cash distributions			(66,112)	$ (401)	(4,395)	[1]	$ (118)		(61,717)	[2]	$ (283)
Net income		57,360	57,360		$ 3,852	[1]			$ 53,508	[2]
Other comprehensive income (loss)		$ 6,110	6,110										6,110
Balance (in shares) at Dec. 31, 2021		131,227,363			8,542,097	[1]			122,685,266	[2]
Balance at Dec. 31, 2021			$ 1,366,353		$ 89,680	[1]			$ 1,280,048	[2]			$ (3,375)
Total (in shares)		131,227,363			8,542,097	[1]			122,685,266	[2]

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

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