Retail Opportunity Investments (ROIC) 10-K 19 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Feb. 14, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity Registrant Name	RETAIL OPPORTUNITY INVESTMENTS CORP.
Entity File Number	001-33749
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	26-0500600
Entity Address, Address Line One	11250 El Camino Real
Entity Address, City or Town	San Diego,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92130
City Area Code	858
Local Phone Number	677-0900
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	ROIC
Security Exchange Name	NASDAQ
Entity Public Float			$ 1.9
Entity Common Stock, Shares Outstanding		116,455,432
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001407623
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Retail Opportunity Investments Partnership L.P.
Document Information [Line Items]
Entity Registrant Name	RETAIL OPPORTUNITY INVESTMENTS PARTNERSHIP, LP
Entity File Number	333-189057-01
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-2969738
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001577230
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Investments:
Land	$ 879,540	$ 894,240
Building and improvements	2,252,301	2,266,232
Total real estate investments	3,131,841	3,160,472
Less:  accumulated depreciation	390,916	329,207
Net real estate before mortgage notes	2,740,925	2,831,265
Mortgage note receivable	13,000	0
Real Estate Investments, net	2,753,925	2,831,265
Cash and cash equivalents	3,800	6,076
Restricted cash	1,658	1,373
Tenant and other receivables, net	45,821	46,832
Acquired lease intangible assets, net	59,701	72,109
Prepaid expenses	3,169	4,194
Deferred charges, net	27,652	33,857
Other assets	18,031	7,365
Total assets	2,913,757	3,003,071
Liabilities:
Term loan	298,330	299,076
Credit facility	80,743	153,689
Senior Notes	942,850	941,449
Mortgage notes payable	87,523	88,511
Acquired lease intangible liabilities, net	144,757	166,146
Accounts payable and accrued expenses	17,562	15,488
Tenants’ security deposits	7,177	7,065
Other liabilities	42,987	23,219
Total liabilities	1,621,929	1,694,643
Commitments and contingencies
Equity/Capital:
Preferred stock, $.0001 par value 50,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.0001 par value, 500,000,000 shares authorized; 116,496,016 and 113,992,837 shares issued and outstanding at December 31, 2019 and 2018, respectively	12	11
Additional paid-in-capital	1,481,466	1,441,080
Dividends in excess of earnings	(297,998)	(256,438)
Accumulated other comprehensive (loss) income	(4,132)	3,561
Total Retail Opportunity Investments Corp. stockholders' equity	1,179,348	1,188,214
Non-controlling interests	112,480	120,214
Total equity/capital	1,291,828	1,308,428
Total liabilities and equity/capital	2,913,757	3,003,071
Retail Opportunity Investments Partnership L.P.
Real Estate Investments:
Land	879,540	894,240
Building and improvements	2,252,301	2,266,232
Total real estate investments	3,131,841	3,160,472
Less:  accumulated depreciation	390,916	329,207
Net real estate before mortgage notes	2,740,925	2,831,265
Mortgage note receivable	13,000	0
Real Estate Investments, net	2,753,925	2,831,265
Cash and cash equivalents	3,800	6,076
Restricted cash	1,658	1,373
Tenant and other receivables, net	45,821	46,832
Acquired lease intangible assets, net	59,701	72,109
Prepaid expenses	3,169	4,194
Deferred charges, net	27,652	33,857
Other assets	18,031	7,365
Total assets	2,913,757	3,003,071
Liabilities:
Term loan	298,330	299,076
Credit facility	80,743	153,689
Senior Notes	942,850	941,449
Mortgage notes payable	87,523	88,511
Acquired lease intangible liabilities, net	144,757	166,146
Accounts payable and accrued expenses	17,562	15,488
Tenants’ security deposits	7,177	7,065
Other liabilities	42,987	23,219
Total liabilities	1,621,929	1,694,643
Equity/Capital:
ROIC capital	1,183,480	1,184,653
Limited partners’ capital	112,480	120,214
Accumulated other comprehensive (loss) income	(4,132)	3,561
Total equity/capital	1,291,828	1,308,428
Total liabilities and equity/capital	$ 2,913,757	$ 3,003,071

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Rental revenue	$ 291,263,000	$ 289,601,000	$ 269,382,000
Other income	3,777,000	6,197,000	3,878,000
Total revenues	295,040,000	295,798,000	273,260,000
Operating expenses
Property operating	43,662,000	43,851,000	39,151,000
Property taxes	32,388,000	32,349,000	29,663,000
Depreciation and amortization	97,559,000	100,838,000	96,256,000
General and administrative expenses	17,831,000	14,918,000	14,103,000
Acquisition transaction costs	0	0	4,000
Other expense	1,405,000	478,000	418,000
Total operating expenses	192,845,000	192,434,000	179,595,000
Gain on sale of real estate	13,175,000	5,890,000	0
Operating income	115,370,000	109,254,000	93,665,000
Non-operating expenses
Interest expense and other finance expenses	(61,687,000)	(62,113,000)	(50,977,000)
Net income	53,683,000	47,141,000	42,688,000
Net income attributable to non-controlling interests	(4,839,000)	(4,405,000)	(4,211,000)
Net Income Attributable to Retail Opportunity Investments Corp.	$ 48,844,000	$ 42,736,000	$ 38,477,000
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.42	$ 0.38	$ 0.35
Dividends per share (in dollars per share)	$ 0.7880	$ 0.7800	$ 0.7500
Comprehensive income:
Net income	$ 53,683,000	$ 47,141,000	$ 42,688,000
Unrealized swap derivative (loss) gain arising during the period	(7,348,000)	1,648,000	3,665,000
Reclassification adjustment for amortization of interest expense included in net income	(345,000)	57,000	1,920,000
Other comprehensive (loss) income	(7,693,000)	1,705,000	5,585,000
Comprehensive income	45,990,000	48,846,000	48,273,000
Comprehensive income attributable to non-controlling interests	(4,839,000)	(4,405,000)	(4,211,000)
Comprehensive income attributable to Retail Opportunity Investments Corp.	41,151,000	44,441,000	44,062,000
Retail Opportunity Investments Partnership L.P.
Revenues
Rental revenue	291,263,000	289,601,000	269,382,000
Other income	3,777,000	6,197,000	3,878,000
Total revenues	295,040,000	295,798,000	273,260,000
Operating expenses
Property operating	43,662,000	43,851,000	39,151,000
Property taxes	32,388,000	32,349,000	29,663,000
Depreciation and amortization	97,559,000	100,838,000	96,256,000
General and administrative expenses	17,831,000	14,918,000	14,103,000
Acquisition transaction costs	0	0	4,000
Other expense	1,405,000	478,000	418,000
Total operating expenses	192,845,000	192,434,000	179,595,000
Gain on sale of real estate	13,175,000	5,890,000	0
Operating income	115,370,000	109,254,000	93,665,000
Non-operating expenses
Interest expense and other finance expenses	(61,687,000)	(62,113,000)	(50,977,000)
Net income	$ 53,683,000	$ 47,141,000	$ 42,688,000
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.42	$ 0.38	$ 0.35
Dividends per share (in dollars per share)	$ 0.7880	$ 0.7800	$ 0.7500
Comprehensive income:
Net income	$ 53,683,000	$ 47,141,000	$ 42,688,000
Unrealized swap derivative (loss) gain arising during the period	(7,348,000)	1,648,000	3,665,000
Reclassification adjustment for amortization of interest expense included in net income	(345,000)	57,000	1,920,000
Other comprehensive (loss) income	(7,693,000)	1,705,000	5,585,000
Comprehensive income	$ 45,990,000	$ 48,846,000	$ 48,273,000

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Officer	Common Stock	Additional paid-in capital	Accumulated dividends in excess of earnings	Accumulated dividends in excess of earningsOfficer	Accumulated other comprehensive (loss) income	Non- controlling interests	Non- controlling interestsOfficer
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)			109,301,762
Balance at Dec. 31, 2016	$ 1,315,565		$ 11	$ 1,357,910	$ (165,951)		$ (3,729)	$ 127,324
Balance (in shares) at Dec. 31, 2016			109,301,762
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the Equity Incentive Plan (in shares)			353,261
Shares issued under the Equity Incentive Plan	44			44
Shares withheld for employee taxes (in shares)			(74,331)
Shares withheld for employee taxes	(1,571)			(1,571)
Cancellation of restricted stock (in shares)			(1,999)
Stock based compensation expense	6,190			6,190
Issuance of OP Units to non-controlling interests	49,599							49,599
Equity Redemption of OP Units (in shares)			2,555,933
Equity redemption of OP Units	50,155			50,155				(50,155)
Cash redemption for non-controlling interests	(150)							(150)
Adjustment to non-controlling interests ownership in Operating Partnership				(3,574)				3,574
Proceeds from the issuance of common stock (in shares)			212,825
Proceeds from the issuance of common stock	4,481		$ 0	4,481
Registration expenditures	(1,045)			(1,045)
Cash dividends	(91,510)	$ (235)			(82,781)	$ (235)		(8,729)
Net income attributable to Retail Opportunity Investments Corp.	38,477				38,477
Net income attributable to non-controlling interests	4,211							4,211
Other comprehensive income (loss)	5,585						5,585
Total (in shares)			112,347,451
Balance (in shares) at Dec. 31, 2017			112,347,451
Balance at Dec. 31, 2017	1,329,641		$ 11	1,412,590	(210,490)		1,856	125,674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)			112,347,451
Shares issued under the Equity Incentive Plan (in shares)			397,861
Shares issued under the Equity Incentive Plan	269			269
Shares withheld for employee taxes (in shares)			(70,168)
Shares withheld for employee taxes	(1,400)			(1,400)
Cancellation of restricted stock (in shares)			(8,997)
Stock based compensation expense	7,392			7,392
Equity redemption of OP Units	0
Cash redemption for non-controlling interests	(3,713)							(3,713)
Adjustment to non-controlling interests ownership in Operating Partnership				(2,904)				2,904
Proceeds from the issuance of common stock (in shares)			1,326,690
Proceeds from the issuance of common stock	25,703		$ 0	25,703
Registration expenditures	(570)			(570)
Cash dividends	(97,473)	(267)			(88,417)	(267)		(9,056)
Net income attributable to Retail Opportunity Investments Corp.	42,736				42,736
Net income attributable to non-controlling interests	4,405							4,405
Other comprehensive income (loss)	$ 1,705						1,705
Total (in shares)	113,992,837		113,992,837
Balance (in shares) at Dec. 31, 2018	113,992,837		113,992,837
Balance at Dec. 31, 2018	$ 1,308,428		$ 11	1,441,080	(256,438)		3,561	120,214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)	113,992,837		113,992,837
Shares issued under the Equity Incentive Plan (in shares)			631,022
Shares issued under the Equity Incentive Plan	$ 1,942			1,942
Shares withheld for employee taxes (in shares)			(125,072)
Shares withheld for employee taxes	(1,986)			(1,986)
Cancellation of restricted stock (in shares)			(6,997)
Stock based compensation expense	$ 8,567			7,352				1,215
Equity Redemption of OP Units (in shares)	143,190		143,190
Equity redemption of OP Units	$ 2,632			2,632				(2,632)
Cash redemption for non-controlling interests	(5,043)							(5,043)
Adjustment to non-controlling interests ownership in Operating Partnership				(2,983)				2,983
Proceeds from the issuance of common stock (in shares)			1,861,036
Proceeds from the issuance of common stock	34,162		$ 1	34,161
Registration expenditures	(732)			(732)
Cash dividends	(99,470)	$ (30)			(90,549)	$ 145		(8,921)	$ (175)
Net income attributable to Retail Opportunity Investments Corp.	48,844				48,844
Net income attributable to non-controlling interests	4,839							4,839
Other comprehensive income (loss)	$ (7,693)						(7,693)
Total (in shares)	113,992,837		116,496,016
Balance (in shares) at Dec. 31, 2019	116,496,016		116,496,016
Balance at Dec. 31, 2019	$ 1,291,828		$ 12	$ 1,481,466	$ (297,998)		$ (4,132)	$ 112,480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)	116,496,016		116,496,016

Consolidated Statement of Partn

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 CapitalOfficer	Retail Opportunity Investments Partnership L.P.ROIC Capital		Retail Opportunity Investments Partnership L.P.ROIC CapitalOfficer	[2]	Retail Opportunity Investments Partnership L.P.Accumulated other comprehensive (loss) income
Total (in shares)					11,668,061	[1]		109,301,762	[2]
Balance (in shares) at Dec. 31, 2016					11,668,061	[1]		109,301,762	[2]
Balance at Dec. 31, 2016			$ 1,315,565		$ 127,324	[1]		$ 1,191,970	[2]			$ (3,729)
OP Units issued under the Equity Incentive Plan (in shares)	[2]							353,261
OP Units issued under the Equity Incentive Plan		$ 44	44					$ 44	[2]
OP Units withheld for employee taxes (in shares)	[2]							(74,331)
OP Units withheld for employee taxes		(1,571)	(1,571)					$ (1,571)	[2]
Cancellation of OP Units (in shares)	[2]							(1,999)
Stock based compensation expense		6,190	6,190					$ 6,190	[2]
Issuance of OP Units in connection with acquisition (in shares)	[1]				2,573,927
Issuance of OP Units in connection with acquisition			49,599		$ 49,599	[1]
Equity Redemption of OP Units (in shares)					(2,555,933)	[1]		2,555,933	[2]
Equity Redemption of OP Units					$ 50,155	[1]		$ (50,155)	[2]
Cash redemption of OP Units (in shares)	[1]				(7,064)
Cash redemption of OP Units		(150)	(150)		$ (150)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership					3,574	[1]		$ (3,574)	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]							212,825
Issuance of OP Units in connection with common stock offering		4,481	4,481					$ 4,481	[2]
Registration expenditures		(1,045)	(1,045)					(1,045)	[2]
Cash distributions			(91,510)	$ (235)	(8,729)	[1]		(82,781)	[2]	$ (235)
Net income		42,688	42,688		$ 4,211	[1]		$ 38,477	[2]
Other comprehensive income (loss)		5,585	5,585									5,585
Total (in shares)					11,678,991	[1]		112,347,451	[2]
Balance (in shares) at Dec. 31, 2017					11,678,991	[1]		112,347,451	[2]
Balance at Dec. 31, 2017			1,329,641		$ 125,674	[1]		$ 1,202,111	[2]			1,856
Total (in shares)					11,678,991	[1]		112,347,451	[2]
OP Units issued under the Equity Incentive Plan (in shares)	[2]							397,861
OP Units issued under the Equity Incentive Plan		269	269					$ 269	[2]
OP Units withheld for employee taxes (in shares)	[2]							(70,168)
OP Units withheld for employee taxes		(1,400)	(1,400)					$ (1,400)	[2]
Cancellation of OP Units (in shares)	[2]							(8,997)
Stock based compensation expense		7,392	7,392					$ 7,392	[2]
Cash redemption of OP Units (in shares)	[1]				(201,950)
Cash redemption of OP Units		(3,713)	(3,713)		$ (3,713)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership					2,904	[1]		$ (2,904)	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]							1,326,690
Issuance of OP Units in connection with common stock offering		25,703	25,703					$ 25,703	[2]
Registration expenditures		(570)	(570)					(570)	[2]
Cash distributions			(97,473)	(267)	(9,056)	[1]		(88,417)	[2]	(267)
Net income		47,141	47,141		$ 4,405	[1]		$ 42,736	[2]
Other comprehensive income (loss)		1,705	1,705									1,705
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
Total (in shares)					11,477,041	[1]		113,992,837	[2]
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			(143,190)	[1]		143,190	[2]
Equity Redemption of OP Units					$ 2,632	[1]		$ (2,632)	[2]
Cash redemption of OP Units (in shares)		(282,761)			(282,761)	[1]
Cash redemption of OP Units		$ (5,043)	(5,043)		$ (5,043)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership					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)
Total (in shares)		127,547,106			11,051,090	[1]		116,496,016	[2]
Balance (in shares) at Dec. 31, 2019		127,547,106			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)		127,547,106			11,051,090	[1]		116,496,016	[2]
[1]	Consists of limited partnership interests held by third parties.
[2]	Consists of general and limited partnership interests held by ROIC.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 53,683,000	$ 47,141,000	$ 42,688,000
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	97,559,000	100,838,000	96,256,000
Amortization of deferred financing costs and mortgage premiums, net	2,076,000	1,899,000	2,026,000
Straight-line rent adjustment	(3,083,000)	(5,380,000)	(6,176,000)
Amortization of above and below market rent	(15,618,000)	(13,965,000)	(17,078,000)
Amortization relating to stock based compensation	8,567,000	7,392,000	6,190,000
Provisions for tenant credit losses	1,969,000	1,729,000	1,191,000
Other noncash interest expense	524,000	1,674,000	2,139,000
Gain on sale of real estate	(13,175,000)	(5,890,000)	0
Change in operating assets and liabilities:
Tenant and other receivables	543,000	(57,000)	(2,452,000)
Prepaid expenses	962,000	(1,344,000)	464,000
Accounts payable and accrued expenses	303,000	(1,622,000)	456,000
Other assets and liabilities, net	(2,271,000)	(1,497,000)	3,234,000
Net cash provided by operating activities	132,039,000	130,918,000	128,938,000
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in real estate	(11,601,000)	(44,195,000)	(263,366,000)
Proceeds from sale of real estate	58,930,000	26,880,000	0
Improvements to properties	(35,177,000)	(39,240,000)	(54,097,000)
Deposits on real estate acquisitions, net	0	500,000	(500,000)
Proceeds on repayment of mortgage note receivable	250,000	0	0
Net cash provided by (used in) investing activities	12,402,000	(56,055,000)	(317,963,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal repayments on mortgages	(551,000)	(19,612,000)	(8,848,000)
Proceeds from draws on credit facility	101,000,000	177,000,000	327,500,000
Payments on credit facility	(173,000,000)	(164,500,000)	(282,000,000)
Proceeds from issuance of Senior Notes	0	0	250,000,000
Redemption of OP Units	(5,043,000)	(3,713,000)	(150,000)
Distributions to OP Unitholders	(8,921,000)	(9,056,000)	(8,729,000)
Deferred financing and other costs	(2,804,000)	0	(3,845,000)
Proceeds from the issuance of common stock	34,162,000	25,703,000	4,481,000
Registration expenditures	(478,000)	(570,000)	(1,225,000)
Dividends paid to common shareholders	(90,753,000)	(88,500,000)	(82,917,000)
Common shares issued under the Equity Incentive Plan	1,942,000	269,000	44,000
Shares withheld for employee taxes	(1,986,000)	(1,400,000)	(1,571,000)
Net cash (used in) provided by financing activities	(146,432,000)	(84,379,000)	192,740,000
Net (decrease) increase in cash, cash equivalents and restricted cash	(1,991,000)	(9,516,000)	3,715,000
Cash, cash equivalents and restricted cash at beginning of period	7,449,000	16,965,000	13,250,000
Cash, cash equivalents and restricted cash at end of period	5,458,000	7,449,000	16,965,000
Reconciliation of Cash and Cash Equivalents [Abstract]
Total cash, cash equivalents and restricted cash shown in Statements of Cash Flows	7,449,000	7,449,000	16,965,000
Retail Opportunity Investments Partnership L.P.
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	53,683,000	47,141,000	42,688,000
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	97,559,000	100,838,000	96,256,000
Amortization of deferred financing costs and mortgage premiums, net	2,076,000	1,899,000	2,026,000
Straight-line rent adjustment	(3,083,000)	(5,380,000)	(6,176,000)
Amortization of above and below market rent	(15,618,000)	(13,965,000)	(17,078,000)
Amortization relating to stock based compensation	8,567,000	7,392,000	6,190,000
Provisions for tenant credit losses	1,969,000	1,729,000	1,191,000
Other noncash interest expense	524,000	1,674,000	2,139,000
Gain on sale of real estate	(13,175,000)	(5,890,000)	0
Change in operating assets and liabilities:
Tenant and other receivables	543,000	(57,000)	(2,452,000)
Prepaid expenses	962,000	(1,344,000)	464,000
Accounts payable and accrued expenses	303,000	(1,622,000)	456,000
Other assets and liabilities, net	(2,271,000)	(1,497,000)	3,234,000
Net cash provided by operating activities	132,039,000	130,918,000	128,938,000
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in real estate	(11,601,000)	(44,195,000)	(263,366,000)
Proceeds from sale of real estate	58,930,000	26,880,000	0
Improvements to properties	(35,177,000)	(39,240,000)	(54,097,000)
Deposits on real estate acquisitions, net	0	500,000	(500,000)
Proceeds on repayment of mortgage note receivable	250,000	0	0
Net cash provided by (used in) investing activities	12,402,000	(56,055,000)	(317,963,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal repayments on mortgages	(551,000)	(19,612,000)	(8,848,000)
Proceeds from draws on credit facility	101,000,000	177,000,000	327,500,000
Payments on credit facility	(173,000,000)	(164,500,000)	(282,000,000)
Proceeds from issuance of Senior Notes	0	0	250,000,000
Redemption of OP Units	(5,043,000)	(3,713,000)	(150,000)
Distributions to OP Unitholders	(99,674,000)	(97,556,000)	(91,646,000)
Deferred financing and other costs	(2,804,000)	0	(3,845,000)
Proceeds from the issuance of common stock	34,162,000	25,703,000	4,481,000
Registration expenditures	(478,000)	(570,000)	(1,225,000)
Common shares issued under the Equity Incentive Plan	1,942,000	269,000	44,000
Shares withheld for employee taxes	(1,986,000)	(1,400,000)	(1,571,000)
Net cash (used in) provided by financing activities	(146,432,000)	(84,379,000)	192,740,000
Net (decrease) increase in cash, cash equivalents and restricted cash	(1,991,000)	(9,516,000)	3,715,000
Cash, cash equivalents and restricted cash at beginning of period	7,449,000	16,965,000	13,250,000
Cash, cash equivalents and restricted cash at end of period	5,458,000	7,449,000	16,965,000
Reconciliation of Cash and Cash Equivalents [Abstract]
Total cash, cash equivalents and restricted cash shown in Statements of Cash Flows	$ 7,449,000	$ 7,449,000	$ 13,250,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Preferred stock par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	116,496,016	113,992,837
Common stock, shares outstanding (in shares)	116,496,016	113,992,837

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Dividends per share (in dollars per share)	$ 0.7880	$ 0.7800	$ 0.7500

Consolidated Statement of Par_2

Consolidated Statement of Partners' Capital (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash distributions per unit (usd per share)	$ 0.7880	$ 0.7800	$ 0.7500
Retail Opportunity Investments Partnership L.P.
Cash distributions per unit (usd per share)	$ 0.7880	$ 0.7800	$ 0.7500

Organization, Basis of Presenta

Organization, Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Organization, Basis of Presentation and Summary of Significant Accounting Policies	Organization, Basis of Presentation and Summary of Significant Accounting Policies Business Retail Opportunity Investments Corp., a Maryland corporation (“ROIC”), is a fully integrated and self-managed real estate investment trust (“REIT”). ROIC specializes in the acquisition, ownership and management of necessity-based community and neighborhood shopping centers on the west coast of the United States anchored by supermarkets and drugstores. ROIC is organized in a traditional umbrella partnership real estate investment trust (“UpREIT”) format pursuant to which Retail Opportunity Investments GP, LLC, its wholly-owned subsidiary, serves as the general partner of, and ROIC conducts substantially all of its business through, its operating partnership subsidiary, Retail Opportunity Investments Partnership, LP, a Delaware limited partnership (the “Operating Partnership”), together with its subsidiaries. Unless otherwise indicated or unless the context requires otherwise, all references to the “Company”, “we,” “us,” “our,” or “our company” refer to ROIC together with its consolidated subsidiaries, including the Operating Partnership. ROIC’s only material asset is its ownership of direct or indirect partnership interests in the Operating Partnership and membership interest in Retail Opportunity Investments GP, LLC, which is the sole general partner of the Operating Partnership. As a result, ROIC does not conduct business itself, other than acting as the parent company and issuing equity from time to time. The Operating Partnership holds substantially all the assets of the Company and directly or indirectly holds the ownership interests in the Company’s real estate ventures. The Operating Partnership conducts the operations of the Company’s business and is structured as a partnership with no publicly traded equity. Except for net proceeds from equity issuances by ROIC, which are contributed to the Operating Partnership, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s incurrence of indebtedness (directly and through subsidiaries) or through the issuance of operating partnership units (“OP Units”) of the Operating Partnership. Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standard Update (“ASU”) No. 2016-2, “Leases.” ASU No. 2016-2 resulted in the recognition of a right-to-use asset and related liability to account for future obligations under ground lease agreements for which the Company is the lessee. In addition, this ASU requires that lessees and lessors capitalize, as initial direct costs, only those costs that are incurred due to the execution of a lease. Allocated payroll costs and other costs that are incurred regardless of whether the lease is obtained are no longer capitalized as initial direct costs and instead are expensed as incurred. Under ASU No. 2016-2, each lease agreement will be evaluated to identify the lease components and nonlease components at lease inception. The total consideration in the lease agreement will be allocated to the lease and nonlease components based on their relative standalone selling prices. Lessors will continue to recognize the lease revenue component using an approach that is substantially equivalent to existing guidance for operating leases (straight-line basis). In July 2018, the FASB issued an amendment to ASU No. 2016-2 that allows lessors to elect, as a practical expedient, not to allocate the total consideration to lease and nonlease components based on their relative standalone selling prices. This practical expedient allows lessors to elect a combined single lease component presentation if (i) the timing and pattern of the revenue recognition of the combined single lease component is the same, and (ii) the related lease component and, the combined single lease component would be classified as an operating lease. The amendment also provides a transition option that permits the application of the new guidance as of the adoption date rather than to all periods presented. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company adopted the provisions of ASU No. 2016-2 effective January 1, 2019 using the modified retrospective approach and accordingly, recognized a lease liability of approximately $18.0 million, which is included in Other liabilities in the accompanying balance sheet, and a related right-to-use asset of approximately $17.0 million, which is included in Other assets in the accompanying balance sheet, for all operating leases in which the Company is a lessee based on the present value of the minimum rental payments remaining as of the initial application date. The present value of the remaining lease payments was calculated for each operating lease using each respective remaining lease term and a corresponding estimated incremental borrowing rate, which is the interest rate that the Company estimates it would have to pay to borrow on a collateralized basis over a similar term. Based on its election of the package of practical expedients, the Company was not required to reassess whether any expired or existing contracts are or contain leases, reassess the lease classification for any expired or existing leases, or reassess initial direct costs for any existing leases. Accordingly, the Company’s ground lease agreements for which the Company is the lessee will continue to be accounted for as operating leases under the new standard. Further, the Company elected the practical expedient to account for both its lease and non-lease components as a combined single lease component and elected the optional transition method permitting January 1, 2019 to be its initial application date. Additionally, leasing payroll-related costs that are incurred regardless of whether leases are obtained are no longer capitalized as initial direct costs and instead are expensed as incurred. These costs amounted to approximately $1.3 million and $1.2 million during the years ended December 31, 2018 and 2017, respectively. Further, bad debt, which has previously been recorded in Property operating, has now been classified as a contra-revenue account in Rental revenue in the Company’s consolidated statements of operations and comprehensive income. In June 2016, the FASB issued ASU No. 2016-13 “Financial Instruments - Credit Topics.” ASU No. 2016-13 requires companies to adopt a new approach to estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans. The standard requires entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables. ASU No. 2016-13 will be effective for the Company beginning on January 1, 2020, with early adoption permitted. The Company does not expect that the adoption of this pronouncement will have a material impact on the consolidated financial statements. Principles of Consolidation The accompanying consolidated financial statements are prepared on the accrual basis in accordance with GAAP. In the opinion of management, the consolidated financial statements include all adjustments necessary, which are of a normal and recurring nature, for the fair presentation of the Company’s financial position and the results of operations and cash flows for the periods presented. The consolidated financial statements include the accounts of the Company and those of its subsidiaries, which are wholly-owned or controlled by the Company. Entities which the Company does not control through its voting interest and entities which are variable interest entities (“VIEs”), but where it is not the primary beneficiary, are accounted for under the equity method. All significant intercompany balances and transactions have been eliminated. The Company follows the FASB guidance for determining whether an entity is a VIE and requires the performance of a qualitative rather than a quantitative analysis to determine the primary beneficiary of a VIE. Under this guidance, an entity would be required to consolidate a VIE if it has (i) the power to direct the activities that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. The Company has concluded that the Operating Partnership is a VIE, and because they have both the power and the rights to control the Operating Partnership, they are the primary beneficiary and are required to continue to consolidate the Operating Partnership. A non-controlling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Non-controlling interests are required to be presented as a separate component of equity in the consolidated balance sheet and modify the presentation of net income by requiring earnings and other comprehensive income to be attributed to controlling and non-controlling interests. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the disclosure of contingent assets and liabilities, the reported amounts of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods covered by the financial statements. The most significant assumptions and estimates relate to the recoverability of assets to be held and used, purchase price allocations, depreciable lives, revenue recognition and the collectability of tenant receivables, other receivables, notes receivables, the valuation of performance-based restricted stock, LTIPs, and derivatives. Actual results could differ from these estimates. Federal Income Taxes The Company has elected to qualify as a REIT under Sections 856-860 of the Internal Revenue Code (the “Code”). Under those sections, a REIT that, among other things, distributes at least 90% of its REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gains) and meets certain other qualifications prescribed by the Code, will not be taxed on that portion of its taxable income that is distributed. Although it may qualify as a REIT for U.S. federal income tax purposes, the Company is subject to state income or franchise taxes in certain states in which some of its properties are located. For all periods from inception through September 26, 2013 the Operating Partnership had been an entity disregarded from its sole owner, ROIC, for U.S. federal income tax purposes and as such had not been subject to U.S. federal income taxes. Effective September 27, 2013, the Operating Partnership issued OP Units in connection with the acquisitions of two shopping centers. Accordingly, the Operating Partnership ceased being a disregarded entity and instead is being treated as a partnership for U.S. federal income tax purposes. The Company follows the FASB guidance that defines a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The FASB also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company records interest and penalties relating to unrecognized tax benefits, if any, as interest expense. As of December 31, 2019, the statute of limitations for tax years 2016 through and including 2018 remain open for examination by the Internal Revenue Service (“IRS”) and state taxing authorities. ROIC intends to make regular quarterly distributions to holders of its common stock. U.S. federal income tax law generally requires that a REIT distribute annually at least 90% of its REIT taxable income, without regard to the deduction for dividends paid and excluding net capital gains, and that it pay U.S. federal income tax at regular corporate rates to the extent that it annually distributes less than 100% of its net taxable income. ROIC intends to pay regular quarterly dividends to stockholders in an amount not less than its net taxable income, if and to the extent authorized by its board of directors. Before ROIC pays any dividend, whether for U.S. federal income tax purposes or otherwise, it must first meet both its operating requirements and its debt service on debt. If ROIC’s cash available for distribution is less than its net taxable income, it could be required to sell assets or borrow funds to make cash distributions or it may make a portion of the required distribution in the form of a taxable stock distribution or distribution of debt securities. Real Estate Investments All costs related to the improvement or replacement of real estate properties are capitalized. Additions, renovations and improvements that enhance and/or extend the useful life of a property are also capitalized. Expenditures for ordinary maintenance, repairs and improvements that do not materially prolong the normal useful life of an asset are charged to operations as incurred. During the years ended December 31, 2019 and 2018, capitalized costs related to the improvement or replacement of real estate properties were approximately $38.0 million and $40.3 million, respectively. The Company evaluates each acquisition of real estate to determine if the acquired property meets the definition of a business and needs to be accounted for as a business combination. Under ASU No. 2017-1, the Company first determines whether substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If this threshold is met, the acquired property does not meet the definition of a business and is accounted for as an asset acquisition. The Company expects that acquisitions of real estate properties will not meet the revised definition of a business because substantially all of the fair value is concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets). The Company recognizes the acquisition of real estate properties, including acquired tangible assets (consisting of land, buildings and improvements), and acquired intangible assets and liabilities (consisting of above-market and below-market leases and acquired in-place leases) at their fair value (for acquisitions meeting the definition of a business) and relative fair value (for acquisitions not meeting the definition of a business). The relative fair values used to allocate the cost of an asset acquisition are determined using the same methodologies and assumptions the Company utilizes to determine fair value in a business combination. Acquired lease intangible assets include above-market leases and acquired in-place leases, and acquired lease intangible liabilities represent below-market leases, in the accompanying consolidated balance sheets. The fair value of the tangible assets of an acquired property is determined by valuing the property as if it were vacant, which value is then allocated to land, buildings and improvements based on management’s determination of the relative fair values of these assets. In valuing an acquired property’s intangibles, factors considered by management include an estimate of carrying costs during the expected lease-up periods, and estimates of lost rental revenue during the expected lease-up periods based on management’s evaluation of current market demand. Management also estimates costs to execute similar leases, including leasing commissions, tenant improvements, legal and other related costs. Leasing commissions, legal and other related costs (“lease origination costs”) are classified as Deferred charges in the accompanying consolidated balance sheets. The value of in-place leases is measured by the excess of (i) the purchase price paid for a property after adjusting existing in-place leases to market rental rates, over (ii) the estimated fair value of the property as if vacant. Above-market and below-market lease values are recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between the contractual amounts to be received and management’s estimate of market lease rates, measured over the terms of the respective leases that management deemed appropriate at the time of acquisition. Such valuations include a consideration of the non-cancellable terms of the respective leases as well as any applicable renewal periods. The fair values associated with below-market rental renewal options are determined based on the Company’s experience and the relevant facts and circumstances that existed at the time of the acquisitions. The value of the above-market and below-market leases is amortized to base rental income, over the terms of the respective leases including option periods, if applicable. The value of in-place leases is amortized to expense over the remaining non-cancellable terms of the respective leases. If a lease were to be terminated prior to its stated expiration, all unamortized amounts relating to that lease would be recognized in operations at that time. The Company expenses transaction costs associated with business combinations and unsuccessful property asset acquisitions in the period incurred and capitalizes transaction costs associated with successful property asset acquisitions. In conjunction with the Company’s pursuit and acquisition of real estate investments, the Company did not expense any acquisition transaction costs during the years ended December 31, 2019 or 2018. The Company expensed acquisition transaction costs during the year ended December 31, 2017 of $4,000. Sales of real estate are recognized only when it is determined that the Company will collect substantially all of the consideration to which it is entitled, possession and other attributes of ownership have been transferred to the buyer and the Company has no controlling financial interest. The application of these criteria can be complex and requires the Company to make assumptions. Management has determined that all of these criteria were met for all real estate sold during the periods presented. Asset Impairment The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the asset to aggregate future net cash flows (undiscounted and without interest) expected to be generated by the asset. If such assets are considered impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceed the fair value. Management does not believe that the value of any of the Company’s real estate investments was impaired at December 31, 2019 or December 31, 2018. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. Cash and cash equivalents are maintained at financial institutions and, at times, balances may exceed the federally insured limit by the Federal Deposit Insurance Corporation. The Company has not experienced any losses related to these balances. Restricted Cash The terms of the Company’s mortgage loans payable may require the Company to deposit certain replacement and other reserves with its lenders. Such “restricted cash” is generally available only for property-level requirements for which the reserves have been established and is not available to fund other property level or Company level obligations. Revenue Recognition Management has determined that all of the Company’s leases with its various tenants are operating leases. Rental income is generally recognized based on the terms of leases entered into with tenants. In those instances in which the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. When the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition and lease incentive amortization when possession or control of the space is turned over to the tenant for tenant work to begin. Minimum rental income from leases with scheduled rent increases is recognized on a straight-line basis over the lease term. Percentage rent is recognized when a specific tenant’s sales breakpoint is achieved. Prior to January 1, 2019, the Company considered property operating expense recoveries from tenants of common area maintenance, real estate taxes and other recoverable costs as lease components. Effective January 1, 2019, each lease agreement is evaluated to identify the lease and nonlease components at lease inception. The Company elected the single component practical expedient, which allows lessors to elect a combined single lease component presentation if (i) the timing and pattern of the revenue recognition of the combined single lease component is the same, and (ii) the related lease component and, the combined single lease component would be classified as an operating lease. As a result of this assessment, rental revenues and tenant recoveries from the lease of real estate assets are accounted for as a single component. Lease incentives are amortized as a reduction of rental revenue over the respective tenant lease terms. Termination fees (included in Other income in the consolidated statements of operations and comprehensive income) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees when the following conditions are met: (a) the termination agreement is executed; (b) the termination fee is determinable; (c) all landlord services pursuant to the terminated lease have been rendered; and (d) collectability of the termination fee is assured. Interest income is recognized as it is earned. Gains or losses on disposition of properties are recorded when the criteria for recognizing such gains or losses have been met. The Company must make estimates as to the collectability of its accounts receivable related to base rent, straight-line rent, expense reimbursements and other revenues. Management analyzes accounts receivable by considering tenant creditworthiness, current economic trends, and changes in tenants’ payment patterns when evaluating the adequacy of the allowance for doubtful accounts receivable. The Company also provides an allowance for future credit losses of the deferred straight-line rents receivable. The provision for doubtful accounts at December 31, 2019 and December 31, 2018 was approximately $8.2 million and $6.9 million, respectively. Depreciation and Amortization The Company uses the straight-line method for depreciation and amortization. Buildings are depreciated over estimated useful lives which the Company estimates to be 39-40 years. Property improvements are depreciated over estimated useful lives that range from 10 to 20 years. Furniture and fixtures are depreciated over the estimated useful lives that range from 3 to 10 years. Tenant improvements are amortized over the shorter of the life of the related leases or their useful life. Deferred Leasing and Financing Costs Costs incurred in obtaining tenant leases (principally leasing commissions and acquired lease origination costs) are amortized ratably over the life of the tenant leases. Costs incurred in obtaining long-term financing are amortized ratably over the related debt agreement. The amortization of deferred leasing and financing costs is included in Depreciation and amortization and Interest expense and other finance expenses, respectively, in the consolidated statements of operations and comprehensive income. The unamortized balances of deferred leasing costs included in deferred charges in the Consolidated Balance Sheets as of December 31, 2019 that will be charged to future operations are as follows (in thousands): Lease Origination Costs 2020 $ 5,804 2021 4,922 2022 4,115 2023 3,261 2024 2,523 Thereafter 7,027 $ 27,652 Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and tenant receivables. The Company places its cash and cash equivalents in excess of insured amounts with high quality financial institutions. The Company performs ongoing credit evaluations of its tenants and requires tenants to provide security deposits. Earnings Per Share Basic earnings per share (“EPS”) excludes the impact of dilutive shares and is computed by dividing net income by the weighted average number of shares of common stock outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue shares of common stock were exercised or converted into shares of common stock and then shared in the earnings of the Company. For the years ended December 31, 2019, 2018 and 2017, basic EPS was determined by dividing net income allocable to common stockholders for the applicable period by the weighted average number of shares of common stock outstanding during such period. Net income during the applicable period is also allocated to the time-based unvested restricted stock as these grants are entitled to receive dividends and are therefore considered a participating security. Time-based unvested restricted stock is not allocated net losses and/or any excess of dividends declared over net income; such amounts are allocated entirely to the common stockholders other than the holders of time-based unvested restricted stock. The performance-based restricted stock awards and LTIP Units outstanding under the Equity Incentive Plan described in Note 8 are excluded from the basic EPS calculation, as these units are not participating securities until they vest. The following table sets forth the reconciliation between basic and diluted EPS for ROIC (in thousands, except share data): Year Ended December 31, 2019 2018 2017 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less income attributable to non-controlling interests (4,839) (4,405) (4,211) Less earnings allocated to unvested shares (453) (401) (319) Net income available for common stockholders, basic $ 48,391 $ 42,335 $ 38,158 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less earnings allocated to unvested shares (453) (401) (319) Net income available for common stockholders, diluted $ 53,230 $ 46,740 $ 42,369 Denominator: Denominator for basic EPS – weighted average common equivalent shares 114,177,528 112,645,490 109,400,123 OP units 11,334,408 11,626,312 12,060,835 Performance-based restricted stock awards and LTIP Units 206,100 183,683 153,807 Stock options 23,450 103,408 129,066 Denominator for diluted EPS – weighted average common equivalent shares 125,741,486 124,558,893 121,743,831 Earnings Per Unit The following table sets forth the reconciliation between basic and diluted earnings per unit for the Operating Partnership (in thousands, except unit data): Year Ended December 31, 2019 2018 2017 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less earnings allocated to unvested shares (453) (401) (319) Net income available to unitholders, basic and diluted $ 53,230 $ 46,740 $ 42,369 Denominator: Denominator for basic earnings per unit – weighted average common equivalent units 125,511,936 124,271,802 121,460,958 Performance-based restricted stock awards and LTIP Units 206,100 183,683 153,807 Stock options 23,450 103,408 129,066 Denominator for diluted earnings per unit – weighted average common equivalent units 125,741,486 124,558,893 121,743,831 Stock-Based Compensation The Company has a stock-based employee compensation plan, which is more fully described in Note 8. The Company accounts for its stock-based compensation plan based on the FASB guidance which requires that compensation expense be recognized based on the fair value of the stock awards less forfeitures. Restricted stock grants vest based upon the completion of a service period (“time-based restricted stock grants”) and/or the Company meeting certain established market-indexed financial performance criteria (“performance-based restricted stock grants”). Time-based grants are valued according to the market price for the Company’s common stock at the date of grant. For performance-based restricted stock grants, a Monte Carlo valuation model is used, taking into account the underlying contingency risks associated with the performance criteria. It is the Company’s policy to grant options with an exercise price equal to the quoted closing market price of stock on the grant date. The Company has made certain separate awards in the form of units of limited partnership interests in its Operating Partnership called LTIP Units. The LTIP Units are subject to such conditions and restrictions as the compensation committee may determine, including continued employment or service, achievement of pre-established operational performance goals and market-indexed performance criteria. For the LTIP Units subject to market-indexed performance criteria (the “marked-indexed LTIP Units”), a Monte Carlo valuation model is used, taking into account the underlying contingency risks associated with the performance criteria. All other LTIP Units (the “operational LTIP Units”) are valued according to the market price of the Company’s common stock at the date of grant. Awards of stock options, time-based restricted stock grants and operational LTIP Units are expensed as compensation on a straight-line basis over the requisite service period. Awards of performance-based restricted stock and market-indexed LTIP Units are expensed as compensation under the accelerated attribution method and are recognized in income regardless of the results of the performance criteria. Derivatives The Company records all derivatives on the balance sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged forecasted transactions in a cash flow hedge. When the Company terminates a derivative for which cash flow hedging was being applied, the balance, which was recorded in Other comprehensive income, is amortized to interest expense over the remaining contractual term of the derivative as long as the hedged forecasted transactions continue to be probable of occurring. The Company includes cash payments made to terminate interest rate derivatives as an operating activity on the statement of cash flows, given the nature of the underlying cash flows that the derivative was hedging. Segment Reporting The Company’s primary business is the ownership, management, and redevelopment of retail real estate properties. The Company reviews operating and financial information for each property on an individual basis and therefore, each property represents an individual operating segment. The Company evaluates financial performance using property operating income, defined as operating revenues (base rent and recoveries from tenants), less property and related expenses (property operating expenses and property taxes). The Company has aggregated the pro

Real Estate Investments

Real Estate Investments	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Real Estate Investments	Real Estate Investments The following real estate investment transactions occurred during the years ended December 31, 2019 and 2018. The Company evaluated the following acquisitions and determined that substantially all of the fair value related to each acquisition was concentrated in a single identifiable asset. The Company allocated the total consideration for each acquisition to the individual assets and liabilities acquired on a relative fair value basis. All transaction costs incurred in these acquisitions were capitalized. Property Asset Acquisitions in 2019 On December 13, 2019, the Company acquired the property known as Summerwalk Village located in Lacey, Washington, within the Seattle metropolitan area, for an adjusted purchase price of approximately $11.6 million. Summerwalk Village is approximately 58,000 square feet and is anchored by Walmart Neighborhood Market. The property was acquired with borrowings under the credit facility. Property Asset Acquisitions in 2018 During the year ended December 31, 2018, the Company acquired two properties with a total of approximately 112,000 square feet for an adjusted purchase price of approximately $35.0 million. The financial information set forth below summarizes the Company’s purchase price allocation for the properties acquired during the years ended December 31, 2019 and 2018 (in thousands). December 31, 2019 2018 Assets Land $ 2,320 $ 7,666 Building and improvements 9,281 35,629 Acquired lease intangible asset — 1,763 Deferred charges — 818 Assets acquired $ 11,601 $ 45,876 Liabilities Acquired lease intangible liability — 1,680 Liabilities assumed $ — $ 1,680 The following table summarizes the operating results included in the Company’s historical consolidated statement of operations for the year ended December 31, 2018 for the properties acquired during the year ended December 31, 2018 (in thousands). Year Ended December 31, 2018 Statement of operations: Revenues $ 2,343 Net income attributable to Retail Opportunity Investments Corp. $ 753 Property Dispositions in 2019 On February 15, 2019, the Company sold Vancouver Market Center, a non-core shopping center located in Vancouver, Washington. The sales price of $17.0 million, less costs to sell, resulted in net proceeds of approximately $16.0 million. The Company recorded a gain on sale of real estate of approximately $2.6 million during the year ended December 31, 2019 related to this property disposition. On May 1, 2019, the Company sold Norwood Shopping Center, a non-core shopping center located in Sacramento, California for a sales price of $13.5 million. In connection with the sale of this property, the Company entered into a $13.3 million mortgage note with the buyer. The mortgage note is a four On August 1, 2019, the Company sold Morada Ranch, a non-core shopping center located in Stockton, California. The sales price of $30.0 million, le s s costs to sell, resulted in net proceeds of approximately $29.1 million. The Company recorded a gain on sale of real estate of approximately $10.4 million during the year ended December 31, 2019 related to this property disposition. On December 12, 2019, the Company sold Mission Foothill Marketplace, located in Mission Viejo, California, as a redevelopment property. The Company retained ownership of two retail pads that will be the gateway to the buyer's planned single-family and townhome community. The sales price of approximately $13.6 million, less costs to sell, resulted in net proceeds of approximately $13.5 million. Property Dispositions in 2018 On September 27, 2018, the Company sold Round Hill Square, a non-core shopping center located in Zephyr Cove, Nevada. The sales price of $28.0 million, less costs to sell, resulted in net proceeds of approximately $26.9 million. The Company recorded a gain on sale of real estate of approximately $5.9 million during the year ended December 31, 2018 related to this property disposition.

Acquired Lease Intangibles

Acquired Lease Intangibles	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Lease Intangibles	Acquired Lease Intangibles Intangible assets and liabilities as of December 31, 2019 and 2018 consisted of the following (in thousands): December 31, 2019 2018 Assets: In-place leases $ 77,910 $ 92,354 Accumulated amortization (31,686) (36,835) Above-market leases 25,039 30,093 Accumulated amortization (11,562) (13,503) Acquired lease intangible assets, net $ 59,701 $ 72,109 Liabilities: Below-market leases $ 198,272 $ 217,212 Accumulated amortization (53,515) (51,066) Acquired lease intangible liabilities, net $ 144,757 $ 166,146 For the years ended December 31, 2019, 2018 and 2017, the net amortization of acquired lease intangible assets and acquired lease intangible liabilities for above and below market leases was $15.6 million, $14.0 million and $17.1 million, respectively, which amounts are included in Rental revenue in the accompanying consolidated statements of operations and comprehensive income. For the years ended December 31, 2019, 2018 and 2017, the amortization of in-place leases was $8.1 million, $11.4 million and $14.4 million, respectively, which amounts are included in Depreciation and amortization in the accompanying consolidated statements of operations and comprehensive income. The scheduled future amortization of acquired lease intangible assets as of December 31, 2019 is as follows (in thousands): Year Ending December 31: 2020 $ 5,179 2021 4,138 2022 3,440 2023 2,862 2024 2,458 Thereafter 41,624 Total future amortization of acquired lease intangible assets $ 59,701 The scheduled future amortization of acquired lease intangible liabilities as of December 31, 2019 is as follows (in thousands): Year Ending December 31: 2020 $ 12,289 2021 11,123 2022 10,229 2023 9,485 2024 9,324 Thereafter 92,307 Total future amortization of acquired lease intangible liabilities $ 144,757

Tenant Leases

Tenant Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Tenant Leases	Tenant Leases Space in the Company’s shopping centers is leased to various tenants under operating leases that usually grant tenants renewal options and generally provide for additional rents based on certain operating expenses as well as tenants’ sales volume. Future minimum rents to be received under non-cancellable leases as of December 31, 2019 are summarized as follows (in thousands): Year Ending December 31: 2020 $ 201,202 2021 183,897 2022 159,296 2023 130,882 2024 99,572 Thereafter 415,762 Total minimum lease payments $ 1,190,611

Mortgage Notes Payable, Credit

Mortgage Notes Payable, Credit Facilities and Senior Notes	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Mortgage Notes Payable, Credit Facilities and Senior Notes	Mortgage Notes Payable, Credit Facilities and Senior Notes ROIC does not hold any indebtedness. All debt is held directly or indirectly by the Operating Partnership; however, ROIC has guaranteed the Operating Partnership’s term loan, unsecured revolving credit facility, carve-out guarantees on property-level debt, and the Senior Notes. Costs incurred in obtaining long-term financing are amortized ratably over the related debt agreement. The amortization of deferred financing costs is included in Interest expense and other finance expenses in the consolidated statements of operations and comprehensive income. Mortgage Notes Payable The mortgage notes payable collateralized by respective properties and assignment of leases at December 31, 2019 and December 31, 2018, respectively, were as follows (in thousands, except interest rates): Maturity Date Interest Rate December 31, Property 2019 2018 Casitas Plaza Shopping Center June 2022 5.320 % $ 7,001 $ 7,158 Riverstone Marketplace July 2022 4.960 % 17,656 18,050 Fullerton Crossroads April 2024 4.728 % 26,000 26,000 Diamond Hills Plaza October 2025 3.550 % 35,500 35,500 86,157 86,708 Mortgage premiums 1,594 2,074 Net unamortized deferred financing costs (228) (271) Total mortgage notes payable $ 87,523 $ 88,511 The combined aggregate principal maturities of mortgage notes payable during the next five years and thereafter are as follows (in thousands): Principal Repayments Scheduled Amortization Mortgage Premium Total 2020 $ — $ 577 $ 481 $ 1,058 2021 — 717 481 1,198 2022 23,129 1,003 344 24,476 2023 — 686 216 902 2024 26,000 708 72 26,780 Thereafter 32,787 550 — 33,337 Total $ 81,916 $ 4,241 $ 1,594 $ 87,751 Term Loan and Credit Facility The carrying values of the Company’s unsecured term loan (the “term loan”) were as follows (in thousands): December 31, 2019 2018 Term loan $ 300,000 $ 300,000 Net unamortized deferred financing costs (1,670) (924) Term loan $ 298,330 $ 299,076 The Company has an unsecured term loan agreement with several banks under which the lenders agreed to provide a $300.0 million unsecured term loan facility. Effective December 20, 2019, the Company entered into the First Amendment to First Amended and Restated Term Loan Agreement (as amended, the “Term Loan Agreement”) pursuant to which the maturity date of the term loan was extended from September 8, 2022 to January 20, 2025, without further options for extension. The Term Loan Agreement also provides that the Company may from time to time request increased aggregate commitments of $200.0 million under certain conditions set forth in the Term Loan Agreement, including the consent of the lenders for the additional commitments. Borrowings under the Term Loan Agreement accrue interest on the outstanding principal amount at a rate equal to an applicable rate based on the credit rating level of the Company, plus, as applicable, (i) a LIBOR rate determined by reference to the cost of funds for U.S. dollar deposits for the relevant period (the “Eurodollar Rate”), or (ii) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the rate of interest announced by the Administrative Agent as its “prime rate,” and (c) the Eurodollar Rate plus 1.00%. The carrying values of the Company’s unsecured revolving credit facility were as follows (in thousands): December 31, 2019 2018 Credit facility $ 84,000 $ 156,000 Net unamortized deferred financing costs (3,257) (2,311) Credit facility $ 80,743 $ 153,689 The Operating Partnership has an unsecured revolving credit facility with several banks. Effective December 20, 2019, the Company entered into the First Amendment to Second Amended and Restated Credit Agreement (as amended, the “Credit Facility Agreement”) pursuant to which the borrowing capacity under the credit facility is $600.0 million. The maturity date of the credit facility was extended from September 8, 2021 to February 20, 2024, with two six Both the term loan and credit facility contain customary representations, financial and other covenants. The Operating Partnership’s ability to borrow under the term loan and credit facility are subject to its compliance with financial covenants and other restrictions on an ongoing basis. The Operating Partnership was in compliance with such covenants at December 31, 2019. As of December 31, 2019, $300.0 million and $84.0 million were outstanding under the term loan and credit facility, respectively. The weighted average interest rates on the term loan and the credit facility during the year ended December 31, 2019 were 3.4% and 3.3%, respectively. As discussed in Note 11 of the accompanying financial statements, the Company uses interest rate swaps to manage its interest rate risk and accordingly, the swapped interest rate on the term loan is 3.0%. The Company had no available borrowings under the term loan at December 31, 2019. The Company had $516.0 million available to borrow under the credit facility at December 31, 2019. Senior Notes Due 2027 The carrying value of the Company’s unsecured Senior Notes Due 2027 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Net unamortized deferred financing costs (998) (1,123) Senior Notes Due 2027 $ 249,002 $ 248,877 On November 10, 2017, the Operating Partnership entered into a Note Purchase Agreement which provided for the issuance of $250.0 million principal amount of 4.19% Senior Notes Due 2027 (the “Senior Notes Due 2027”) in a private placement effective December 15, 2017. The Senior Notes Due 2027 pay interest on June 15 and December 15 of each year, commencing on June 15, 2018, and mature on December 15, 2027, unless prepaid earlier by the Operating Partnership. The Operating Partnership’s performance of the obligations under the Note Purchase Agreement, including the payment of any outstanding indebtedness thereunder, are guaranteed, jointly and severally, by ROIC. The net proceeds were used to reduce borrowings under the credit facility. Senior Notes Due 2026 The carrying value of the Company’s unsecured Senior Notes Due 2026 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 200,000 $ 200,000 Net unamortized deferred financing costs (191) (219) Senior Notes Due 2026 $ 199,809 $ 199,781 On July 26, 2016, the Operating Partnership entered into a Note Purchase Agreement, as amended, which provided for the issuance of $200.0 million principal amount of 3.95% Senior Notes Due 2026 (the “Senior Notes Due 2026”) in a private placement effective September 22, 2016. The Senior Notes Due 2026 pay interest on March 22 and September 22 of each year, commencing on March 22, 2017, and mature on September 22, 2026, unless prepaid earlier by the Operating Partnership. The Operating Partnership’s performance of the obligations under the Note Purchase Agreement, including the payment of any outstanding indebtedness thereunder, are guaranteed, jointly and severally, by ROIC. The net proceeds were used to reduce borrowings under the credit facility. Senior Notes Due 2024 The carrying value of the Company’s unsecured Senior Notes Due 2024 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (1,912) (2,252) Net unamortized deferred financing costs (1,094) (1,314) Senior Notes Due 2024 $ 246,994 $ 246,434 On December 3, 2014, the Operating Partnership completed a registered underwritten public offering of $250.0 million aggregate principal amount of 4.000% Senior Notes due 2024 (the “Senior Notes Due 2024”), fully and unconditionally guaranteed by ROIC. The Senior Notes Due 2024 pay interest semi-annually on June 15 and December 15, commencing on June 15, 2015, and mature on December 15, 2024, unless redeemed earlier by the Operating Partnership. The Senior Notes Due 2024 are the Operating Partnership’s senior unsecured obligations that rank equally in right of payment with the Operating Partnership’s other unsecured indebtedness, and effectively junior to (i) all of the indebtedness and other liabilities, whether secured or unsecured, and any preferred equity of the Operating Partnership’s subsidiaries, and (ii) all of the Operating Partnership’s indebtedness that is secured by its assets, to the extent of the value of the collateral securing such indebtedness outstanding. ROIC fully and unconditionally guaranteed the Operating Partnership’s obligations under the Senior Notes Due 2024 on a senior unsecured basis, including the due and punctual payment of principal of, and premium, if any, and interest on, the notes, whether at stated maturity, upon acceleration, notice of redemption or otherwise. The guarantee is a senior unsecured obligation of ROIC and ranks equally in right of payment with all other senior unsecured indebtedness of ROIC. ROIC’s guarantee of the Senior Notes Due 2024 is effectively subordinated in right of payment to all liabilities, whether secured or unsecured, and any preferred equity of its subsidiaries (including the Operating Partnership and any entity ROIC accounts for under the equity method of accounting). Senior Notes Due 2023 The carrying value of the Company’s unsecured Senior Notes Due 2023 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (1,915) (2,339) Net unamortized deferred financing costs (1,040) (1,304) Senior Notes Due 2023 $ 247,045 $ 246,357 On December 9, 2013, the Operating Partnership completed a registered underwritten public offering of $250.0 million aggregate principal amount of 5.000% Senior Notes due 2023 (the “Senior Notes Due 2023”), fully and unconditionally guaranteed by ROIC. The Senior Notes Due 2023 pay interest semi-annually on June 15 and December 15, commencing on June 15, 2014, and mature on December 15, 2023, unless redeemed earlier by the Operating Partnership. The Senior Notes Due 2023 are the Operating Partnership’s senior unsecured obligations that rank equally in right of payment with the Operating Partnership’s other unsecured indebtedness, and effectively junior to (i) all of the indebtedness and other liabilities, whether secured or unsecured, and any preferred equity of the Operating Partnership’s subsidiaries, and (ii) all of the Operating Partnership’s indebtedness that is secured by its assets, to the extent of the value of the collateral securing such indebtedness outstanding. ROIC fully and unconditionally guaranteed the Operating Partnership’s obligations under the Senior Notes Due 2023 on a senior unsecured basis, including the due and punctual payment of principal of, and premium, if any, and interest on, the notes, whether at stated maturity, upon acceleration, notice of redemption or otherwise. The guarantee is a senior unsecured obligation of ROIC and will rank equally in right of payment with all other senior unsecured indebtedness of ROIC. ROIC’s guarantee of the Senior Notes Due 2023 is effectively subordinated in right of payment to all liabilities, whether secured or unsecured, and any preferred equity of its subsidiaries (including the Operating Partnership and any entity ROIC accounts for under the equity method of accounting). The combined aggregate principal maturities of the Company’s unsecured senior notes payable during the next five years and thereafter are as follows (in thousands): Principal Repayments 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 450,000 Total $ 950,000 Deferred Financing Costs The unamortized balances of deferred financing costs associated with the Company’s term loan, unsecured revolving credit facility, Senior Notes Due 2027, Senior Notes Due 2026, Senior Notes Due 2024, Senior Notes Due 2023, and mortgage notes payable included as a direct reduction from the carrying amount of the related debt instrument in the consolidated balance sheets as of December 31, 2019 that will be charged to future operations during the next five years and thereafter are as follows (in thousands): Financing Costs 2020 $ 1,799 2021 1,799 2022 1,796 2023 1,781 2024 836 Thereafter 467 $ 8,478

Preferred Stock of ROIC

Preferred Stock of ROIC	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Preferred Stock of ROIC	Preferred Stock of ROIC The Company is authorized to issue 50,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the board of directors. As of December 31, 2019 and 2018, there were no shares of preferred stock outstanding.

Common Stock of ROIC

Common Stock of ROIC	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Common Stock of ROIC	Common Stock of ROIC ATM On May 1, 2018, ROIC entered into five separate Sales Agreements (the “Sales Agreements”) with each of Capital One Securities, Inc., Jefferies LLC, KeyBanc Capital Markets Inc., Raymond James & Associates, Inc., and Robert W. Baird & Co. Incorporated (each individually, an “Agent” and collectively, the “Agents”) pursuant to which ROIC may sell, from time to time, shares of ROIC’s common stock, par value $0.0001 per share, having an aggregate offering price of up to $250.0 million through the Agents either as agents or principals. In addition, on April 30, 2018, the Company terminated sales agreements with Jefferies, KeyBanc and Raymond James, dated as of September 19, 2014 and with Baird, dated as of May 23, 2016 (the “Prior Sales Agreements”), which the Company entered into in connection with its prior “at the market” offering. During the year ended December 31, 2019, ROIC sold a total of 1,861,036 shares under the Sales Agreements, which resulted in gross proceeds of approximately $34.2 million and commissions of approximately $342,000 paid to the Agents. During the year ended December 31, 2018, ROIC sold a total of 1,251,376 shares under the Sales Agreements, which resulted in gross proceeds of approximately $24.2 million and commissions of approximately $242,000 paid to the Agents. Stock Repurchase Program On July 31, 2013, ROIC’s board of directors authorized a stock repurchase program to repurchase up to a maximum of $50.0 million of the Company’s common stock. Through the year ended December 31, 2019, the Company has not repurchased any shares of common stock under this program.

Stock Compensation and Other Be

Stock Compensation and Other Benefit Plans for ROIC	12 Months Ended
	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation and Other Benefit Plans for ROIC	Stock Compensation and Other Benefit Plans for ROIC ROIC follows the FASB guidance related to stock compensation which establishes financial accounting and reporting standards for stock-based employee compensation plans, including all arrangements by which employees receive shares of stock or other equity instruments of the employer, or the employer incurs liabilities to employees in amounts based on the price of the employer’s stock. The guidance also defines a fair value-based method of accounting for an employee stock option or similar equity instrument. In 2009, the Company adopted the 2009 Equity Incentive Plan. The 2009 Equity Incentive Plan provided for grants of restricted common stock and stock option awards up to an aggregate of 7.5% of the issued and outstanding shares of ROIC’s common stock at the time of the award, subject to a ceiling of 4,000,000 shares. The Company’s Annual Meeting of Stockholders was held on April 25, 2018 at which time the stockholders of the Company approved the Company’s Amended and Restated 2009 Equity Incentive Plan (the “Equity Incentive Plan”). The types of awards that may be granted under the Equity Incentive Plan include stock options, restricted shares, share appreciation rights, phantom shares, dividend equivalent rights and other equity-based awards. The Equity Incentive Plan has a fungible unit system that counts the number of shares of the Company’s common stock used in the issuance of full-value awards, such as restricted shares, differently than the number of shares of common stock used in the issuance of stock options. A total of 22,500,000 Fungible Units (as defined in the Equity Incentive Plan) are reserved for grant under the Equity Incentive Plan and the Fungible Unit-to-full-value award conversion ratio is 6.25 to 1.0. The Equity Incentive Plan will expire on April 25, 2028. Any available shares that had not been granted under the 2009 Equity Incentive Plan were incorporated into and made available for issuance under the Equity Incentive Plan. The Company has made certain awards in the form of a separate series of units of limited partnership interests in its Operating Partnership called LTIP Units, which can be granted either as free-standing awards or in tandem with other awards under the Equity Incentive Plan. The LTIP Units are subject to such conditions and restrictions as the compensation committee may determine, including continued employment or service, achievement of pre-established operational performance goals and market-indexed performance criteria. Upon the occurrence of specified events and subject to the satisfaction of applicable vesting conditions, LTIP Units (after conversion into OP Units, in accordance with the Partnership Agreement) are ultimately redeemable for cash or for unregistered shares of ROIC common stock, at the option of ROIC, on a one-for-one basis. Restricted Stock During the year ended December 31, 2019, ROIC awarded 354,161 shares of time-based restricted common stock under the Equity Incentive Plan. A summary of the status of the Company’s non-vested restricted stock awards as of December 31, 2019, and changes during the year ended December 31, 2019 are presented below: Shares Weighted Average Non-vested as of December 31, 2018 1,002,835 $ 16.88 Granted 354,161 $ 17.20 Vested (364,913) $ 19.06 Forfeited (37,286) $ 12.97 Non-vested as of December 31, 2019 954,797 $ 16.55 As of December 31, 2019, there remained a total of approximately $6.1 million of unrecognized restricted stock compensation related to outstanding non-vested restricted stock grants awarded under the Equity Incentive Plan. Restricted stock compensation is expected to be expensed over a remaining weighted average period of 1.6 years (irrespective of achievement of the performance conditions). The total fair value of restricted stock that vested during the years ended December 31, 2019, 2018 and 2017 was $5.8 million, $5.5 million and $6.3 million, respectively. LTIP Units During the year ended December 31, 2019, ROIC awarded 187,279 LTIP Units under the Equity Incentive Plan. The LTIP Units vest based on both pre-defined operational and market-indexed performance criteria with a vesting date on January 1, 2022. The LTIP Units were issued at a weighted average grant date fair value of $16.27. As of December 31, 2019, there remained a total of approximately $2.4 million of unrecognized compensation expense related to outstanding non-vested LTIPs awarded under the Equity Incentive Plan. LTIP compensation expense is expected to be expensed over a remaining weighted average period of 2.0 years. Stock Options During the year ended December 31, 2019, a total of 186,000 options were exercised at a weighted average exercise price of $10.44. The total intrinsic value of stock options exercised during the year ended December 31, 2019 was approximately $1.4 million. Stock Based Compensation Expense For the years ended December 31, 2019, 2018 and 2017, the amounts charged to expense for all stock based compensation totaled approximately $8.6 million, $7.4 million and $6.2 million, respectively. Profit Sharing and Savings Plan During 2011, the Company established a profit sharing and savings plan (the “401K Plan”), which permits eligible employees to defer a portion of their compensation in accordance with the Code. Under the 401K Plan, the Company made matching contributions on behalf of eligible employees. The Company made contributions to the 401K Plan of approximately $87,000, $86,000 and $70,000 for the years ended December 31, 2019, 2018 and 2017, respectively.

Capital of the Operating Partne

Capital of the Operating Partnership	12 Months Ended
	Dec. 31, 2019
Partners' Capital Notes [Abstract]
Capital of the Operating Partnership	Capital of the Operating Partnership As of December 31, 2019, the Operating Partnership had 127,547,106 OP Units outstanding. ROIC owned an approximate 91.3% interest in the Operating Partnership at December 31, 2019, or 116,496,016 OP Units. The remaining 11,051,090 OP Units are owned by other limited partners. A share of ROIC’s common stock and the OP Units have essentially the same economic characteristics as they share equally in the total net income or loss and distributions of the Operating Partnership. As of December 31, 2019, subject to certain exceptions, holders are able to redeem their OP Units, at the option of ROIC, for cash or for unregistered shares of ROIC common stock on a one-for-one basis. If cash is paid in the redemption, the redemption price is equal to the average closing price on the NASDAQ Stock Market for shares of ROIC’s common stock over the ten consecutive trading days immediately preceding the date a redemption notice is received by ROIC. During the year ended December 31, 2019, ROIC received notices of redemption for a total of 425,951 OP Units. ROIC elected to redeem 282,761 OP Units in cash, and accordingly, a total of approximately $5.0 million was paid during the year ended December 31, 2019 to the holder of the respective OP Units. In accordance with the Second Amended and Restated Agreement of Limited Partnership of the Operating Partnership, the redemption value of the OP Units was calculated based on the average closing price of ROIC’s common stock on the NASDAQ Stock Market for the ten consecutive trading days immediately preceding the date of receipt of the notice of redemption. ROIC elected to redeem the remaining 143,190 OP Units for shares of ROIC common stock on a one-for-one basis, and accordingly, 143,190 shares of ROIC common stock were issued. The redemption value of the OP Units owned by the limited partners as of December 31, 2019, not including ROIC, had such units been redeemed at December 31, 2019, was approximately $191.5 million, calculated based on the average closing price on the NASDAQ Stock Market of ROIC common stock for the ten consecutive trading days immediately preceding December 31, 2019, which amounted to $17.33 per share. Retail Opportunity Investments GP, LLC, ROIC’s wholly-owned subsidiary, is the sole general partner of the Operating Partnership, and as the parent company, ROIC has the full and complete authority over the Operating Partnership’s day-to-day management and control. As the sole general partner of the Operating Partnership, ROIC effectively controls the ability to issue common stock of ROIC upon redemption of any OP Units. The redemption provisions that permit ROIC to settle the redemption of OP Units in either cash or common stock, in the sole discretion of ROIC, are further evaluated in accordance with applicable accounting guidance to determine whether temporary or permanent equity classification on the balance sheet is appropriate. The Company evaluated this guidance, including the ability, in its sole discretion, to settle in unregistered shares of common stock, and determined that the OP Units meet the requirements to qualify for presentation as permanent equity.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company follows the FASB guidance that defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. The guidance applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances. The guidance emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, the guidance establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. The following disclosures of estimated fair value were determined by management, using available market information and appropriate valuation methodologies as discussed in Note 1. Considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts realizable upon disposition of the financial instruments. The use of different market assumptions or estimation methodologies may have a material effect on the estimated fair value amounts. The carrying values of cash and cash equivalents, restricted cash, tenant and other receivables, deposits, prepaid expenses, other assets, accounts payable and accrued expenses are reasonable estimates of their fair values because of the short-term nature of these instruments. The carrying values of the term loan and revolving credit facility are deemed to be at fair value since the outstanding debt is directly tied to monthly LIBOR contracts. The fair value of the outstanding Senior Notes Due 2027 and Senior Notes Due 2026 at December 31, 2019 was approximately $246.7 million and $195.0 million, respectively, calculated using significant inputs which are not observable in the market, or Level 3. The fair value of the outstanding Senior Notes Due 2024 and Senior Notes Due 2023 at December 31, 2019 was approximately $260.4 million and $269.3 million, respectively, based on inputs not quoted on active markets, but corroborated by market data, or Level 2. Assumed mortgage notes payable were recorded at their fair value at the time they were assumed. The Company’s outstanding mortgage notes payable were estimated to have a fair value of approximately $87.2 million with a weighted average interest rate of 3.8% as of December 31, 2019. These fair value measurements fall within Level 3 of the fair value hierarchy.

Derivative and Hedging Activiti

Derivative and Hedging Activities	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Company’s objectives in using interest rate derivatives is to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The following is a summary of the terms of the Company’s current interest rate swaps as of December 31, 2019 (in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Interest Rate Swap Agreements: Bank of Montreal $ 100,000 12/29/2017 8/31/2022 U.S. Bank $ 100,000 12/29/2017 8/31/2022 Regions Bank $ 50,000 1/31/2019 8/31/2022 Royal Bank of Canada $ 50,000 1/31/2019 8/31/2022 The changes in the fair value of derivatives that are designated as cash flow hedges are recorded in accumulated other comprehensive income (“AOCI”) and will be subsequently reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, including interest rate curves, and implied volatilities. The fair value of interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. The Company incorporated credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparties non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contract for the effect of non-performance risk, the Company considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. However, as of December 31, 2019, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative position and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuation in its entirety is classified in Level 2 of the fair value hierarchy. The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands). Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total December 31, 2019: Liabilities Derivative financial instruments $ — $ (3,865) $ — $ (3,865) December 31, 2018: Assets Derivative financial instruments $ — $ 4,931 $ — $ 4,931 Liabilities Derivative financial instruments $ — $ (580) $ — $ (580) Amounts paid, or received, to cash settle interest rate derivatives prior to their maturity date are recorded in AOCI at the cash settlement amount, and will be reclassified to interest expense as interest expense is recognized on the hedged debt. During the next twelve months, the Company estimates that $1.5 million will be reclassified as an increase to interest expense related to the Company’s four outstanding swap arrangements and it’s previously cash-settled swap arrangements. The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the balance sheet as of December 31, 2019 and 2018, respectively (in thousands): Derivatives designed as hedging instruments Balance sheet location December 31, 2019 Fair Value December 31, 2018 Fair Value Interest rate products Other assets $ — $ 4,931 Interest rate products Other liabilities $ (3,865) $ (580) Derivatives in Cash Flow Hedging Relationships The table below details the location in the financial statements of the gain or loss recognized on interest rate derivatives designated as cash flow hedges for the years ended December 31, 2019, 2018, and 2017, respectively (in thousands). Amounts reclassified from other comprehensive income (“OCI”) due to ineffectiveness are recognized as interest expense. Year Ended December 31, 2019 2018 2017 Amount of (loss) gain recognized in OCI on derivatives $ (7,348) $ 1,648 $ 3,665 Amount of (gain) loss reclassified from AOCI into interest $ (345) $ 57 $ 1,920

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of business, from time to time, the Company is involved in legal actions relating to the ownership and operations of its properties. In management’s opinion, the liabilities, if any, that ultimately may result from such legal actions are not expected to have a material adverse effect on the consolidated financial position, results of operations or liquidity of the Company. The Company has signed several ground leases in which the Company is the lessee for the land beneath all or a portion of the buildings for certain properties. In accordance with ASU 2016-02, the Company recorded a right-of-use asset and related lease liability for these ground leases as of January 1, 2019. As of December 31, 2019, the Company’s weighted average remaining lease term is approximately 37.6 years and the weighted average discount rate used to calculate the Company’s lease liability is approximately 5.2%. Rent expense under the Company’s ground leases was approximately $1.6 million, $1.9 million, and $1.5 million for the years ended December 31, 2019, 2018, and 2017, respectively. The following table represents a reconciliation of the Company’s undiscounted future minimum annual lease payments under operating leases to the lease liability as of December 31, 2019 (in thousands): Operating Leases 2020 $ 1,287 2021 1,282 2022 1,304 2023 1,330 2024 1,335 Thereafter 32,604 Total undiscounted future minimum lease payments 39,142 Future minimum lease payments, discount (21,467) Lease liability $ 17,675 Tax Protection Agreements In connection with certain acquisitions from September 2013 through March 2017, the Company entered into Tax Protection Agreements with certain limited partners of the Operating Partnership. The Tax Protection Agreements require the Company, subject to certain exceptions, to indemnify the respective sellers receiving OP Units against certain tax liabilities incurred by them, as calculated pursuant to the respective Tax Protection Agreements, for a period of 12 years (with respect to Tax Protection Agreements entered into in September 2013), or 10 years (with respect to Tax Protection Agreements entered into from December 2014 through March 2017) from the date of the Tax Protection Agreements. If the Company were to trigger the tax protection provisions under these agreements, the Company would be required to pay damages in the amount of the taxes owed by these limited partners (plus additional damages in the amount of the taxes incurred as a result of such payment). Legal Settlement During the year ended December 31, 2019, the Company settled an ongoing lawsuit for approximately $1.4 million and accordingly, recorded a $950,000 charge to Other expense in the accompanying consolidated statements of operations and comprehensive income during the year ended December 31, 2019.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has entered into several lease agreements with an officer of the Company, whereby pursuant to the lease agreements, the Company is provided the use of storage space. For the years ended December 31, 2019, 2018, and 2017, the Company incurred approximately $84,000, $74,000 and $52,000, respectively, of expenses relating to the agreements which were included in General and administrative expenses in the accompanying consolidated statements of operations and comprehensive income.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The unaudited quarterly results of operations for the years ended December 31, 2019 and 2018 for ROIC are as follows (in thousands, except share data): Year Ended December 31, 2019 March 31 June 30 September 30 December 31 Total revenues $ 76,053 $ 72,930 $ 72,438 $ 73,619 Net income $ 14,583 $ 8,346 $ 19,628 $ 11,126 Net income attributable to ROIC $ 13,250 $ 7,585 $ 17,858 $ 10,151 Basic and diluted income per share $ 0.12 $ 0.07 $ 0.16 $ 0.09 Year Ended December 31, 2018 March 31 June 30 September 30 December 31 Total revenues $ 74,395 $ 72,341 $ 73,904 $ 75,158 Net income $ 11,824 $ 8,102 $ 15,647 $ 11,568 Net income attributable to ROIC $ 10,702 $ 7,339 $ 14,194 $ 10,501 Basic and diluted income per share $ 0.09 $ 0.06 $ 0.12 $ 0.09 The unaudited quarterly results of operations for the years ended December 31, 2019 and 2018 for the Operating Partnership are as follows (in thousands, except unit data): Year Ended December 31, 2019 March 31 June 30 September 30 December 31 Total revenues $ 76,053 $ 72,930 $ 72,438 $ 73,619 Net income attributable to the Operating Partnership $ 14,583 $ 8,346 $ 19,628 $ 11,126 Basic and diluted income per unit $ 0.12 $ 0.07 $ 0.16 $ 0.09 Year Ended December 31, 2018 March 31 June 30 September 30 December 31 Total revenues $ 74,395 $ 72,341 $ 73,904 $ 75,158 Net income attributable to the Operating Partnership $ 11,824 $ 8,102 $ 15,647 $ 11,568 Basic and diluted income per unit $ 0.09 $ 0.06 $ 0.12 $ 0.09

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn February 18, 2020, the Company’s board of directors declared a cash dividend on its common stock of $0.20 per share, payable on March 30, 2020 to holders of record on March 16, 2020.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure	SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2019 (in thousands) Initial Cost to Company Cost Capitalized Subsequent to Acquisition Amount at Which Carried at Close of Period Description and Location Encumbrances Land Building & Land Building & Land Building & Accumulated Depreciation (b) (1) Date of Acquisition Paramount Plaza, CA $ — $ 6,347 $ 10,274 $ 530 $ 2,127 $ 6,877 $ 12,401 $ 19,278 $ 3,997 12/22/2009 Santa Ana Downtown Plaza, CA — 7,895 9,890 — 4,029 7,895 13,919 21,814 3,812 1/26/2010 Meridian Valley Plaza, WA — 1,881 4,795 — 1,757 1,881 6,552 8,433 2,085 2/1/2010 The Market at Lake Stevens, WA — 3,087 12,397 — 392 3,087 12,789 15,876 3,782 3/16/2010 Pleasant Hill Marketplace, CA — 6,359 6,927 — 1,590 6,359 8,517 14,876 2,765 4/8/2010 Happy Valley Town Center, OR — 11,678 27,011 — 2,906 11,678 29,917 41,595 8,317 7/14/2010 Cascade Summit Town Square, OR — 8,853 7,732 — 482 8,853 8,214 17,067 2,952 8/20/2010 Heritage Market Center, WA — 6,595 17,399 — 756 6,595 18,155 24,750 4,751 9/23/2010 Claremont Promenade, CA — 5,975 1,019 183 4,388 6,158 5,407 11,565 2,763 9/23/2010 Sycamore Creek, CA — 3,747 11,584 — 520 3,747 12,104 15,851 3,949 9/30/2010 Gateway Village, CA — 5,917 27,298 — 1,247 5,917 28,545 34,462 7,450 12/16/2010 Division Crossing, OR — 3,706 8,327 — 5,586 3,706 13,913 17,619 4,482 12/22/2010 Halsey Crossing, OR (2) — — 7,773 — 7,793 — 15,566 15,566 3,701 12/22/2010 Marketplace Del Rio,CA — 13,420 22,251 9 2,905 13,429 25,156 38,585 7,084 1/3/2011 Pinole Vista Shopping Center, CA — 12,894 35,689 — 5,941 12,894 41,630 54,524 7,407 1/6/2011 / 8/27/2018 Desert Springs Marketplace, CA — 8,517 18,761 443 6,127 8,960 24,888 33,848 6,022 2/17/2011 Mills Shopping Center, CA — 4,084 16,833 — 11,004 4,084 27,837 31,921 8,990 2/17/2011 Renaissance Towne Centre, CA — 8,640 13,848 — 2,346 8,640 16,194 24,834 3,587 8/3/2011 Country Club Gate Center, CA — 6,487 17,341 — 777 6,487 18,118 24,605 4,593 7/8/2011 Canyon Park Shopping Center, WA — 9,352 15,916 — 9,013 9,352 24,929 34,281 6,443 7/29/2011 Hawks Prairie Shopping Center, WA — 5,334 20,694 — 2,225 5,334 22,919 28,253 5,505 9/8/2011 The Kress Building, WA — 5,693 20,866 — 4,839 5,693 25,705 31,398 7,043 9/30/2011 Hillsboro Market Center, OR (2) — — 17,553 — 4,713 — 22,266 22,266 5,240 11/23/2011 Gateway Shopping Center, WA (2) — 6,242 23,462 — 397 6,242 23,859 30,101 5,318 2/16/2012 Euclid Plaza, CA — 7,407 7,753 — 3,117 7,407 10,870 18,277 3,470 3/28/2012 Green Valley Station, CA — 1,685 8,999 — 785 1,685 9,784 11,469 2,676 4/2/2012 Aurora Square, WA — 10,325 13,336 — 2,662 10,325 15,998 26,323 2,888 5/3/2012 / 5/22/2014 Marlin Cove Shopping Center, CA — 8,815 6,797 — 2,151 8,815 8,948 17,763 2,599 5/4/2012 Seabridge Marketplace, CA — 5,098 17,164 — 3,584 5,098 20,748 25,846 4,485 5/31/2012 The Village at Novato, CA — 5,329 4,412 — 1,833 5,329 6,245 11,574 1,246 7/24/2012 Glendora Shopping Center, CA — 5,847 8,758 — 298 5,847 9,056 14,903 2,375 8/1/2012 Wilsonville Old Town Square, OR — 4,181 15,394 — 1,396 4,181 16,790 20,971 3,440 8/1/2012 Initial Cost to Company Cost Capitalized Subsequent to Acquisition Amount at Which Carried at Close of Period Description and Location Encumbrances Land Building & Land Building & Land Building & Accumulated Depreciation (b) (1) Date of Acquisition Bay Plaza, CA — 5,454 14,857 — 1,084 5,454 15,941 21,395 3,577 10/5/2012 Santa Teresa Village, CA — 14,965 17,162 — 6,500 14,965 23,662 38,627 5,597 11/8/2012 Cypress Center West, CA — 15,480 11,819 124 2,051 15,604 13,870 29,474 3,618 12/7/2012 Redondo Beach Plaza, CA — 16,242 13,625 72 297 16,314 13,922 30,236 3,141 12/28/2012 Harbor Place Center, CA — 16,506 10,527 — 533 16,506 11,060 27,566 2,240 12/28/2012 Diamond Bar Town Center, CA — 9,540 16,795 — 3,775 9,540 20,570 30,110 5,585 2/1/2013 Bernardo Heights Plaza, CA — 3,192 8,940 — 728 3,192 9,668 12,860 2,219 2/6/2013 Canyon Crossing, WA — 7,941 24,659 — 2,959 7,941 27,618 35,559 6,814 4/15/2013 Diamond Hills Plaza, CA 35,500 15,458 29,353 — 872 15,458 30,225 45,683 5,818 4/22/2013 Granada Shopping Center, CA — 3,673 13,459 — 842 3,673 14,301 17,974 3,005 6/27/2013 Hawthorne Crossings, CA — 10,383 29,277 — 221 10,383 29,498 39,881 5,703 6/27/2013 Robinwood Shopping Center, OR — 3,997 11,317 18 1,141 4,015 12,458 16,473 2,721 8/23/2013 5 Points Plaza, CA — 17,920 36,965 — 4,242 17,920 41,207 59,127 7,778 9/27/2013 Crossroads Shopping Center, WA — 68,366 67,756 — 19,067 68,366 86,823 155,189 17,347 9/27/2013 Peninsula Marketplace, CA — 14,730 19,214 — 1,979 14,730 21,193 35,923 4,162 11/1/2013 Country Club Village, CA — 9,986 26,579 — 1,797 9,986 28,376 38,362 5,845 11/26/2013 Plaza de la Canada, CA (2) — 10,351 24,819 — 1,233 10,351 26,052 36,403 4,567 12/13/2013 Tigard Marketplace, OR — 13,587 9,603 — 692 13,587 10,295 23,882 2,533 2/18/2014 Creekside Plaza, CA — 14,807 29,476 — 2,495 14,807 31,971 46,778 5,737 2/28/2014 North Park Plaza, CA — 13,593 17,733 — 1,737 13,593 19,470 33,063 3,042 4/30/2014 Fallbrook Shopping Center, CA (2) — 21,232 186,197 83 9,379 21,315 195,576 216,891 32,933 6/13/2014 Moorpark Town Center, CA — 7,063 19,694 — 1,631 7,063 21,325 28,388 4,498 12/4/2014 Mission Foothill Marketplace Pads, CA — 3,996 11,051 — 297 3,996 11,348 15,344 1,439 12/4/2014 Wilsonville Town Center, OR — 10,334 27,101 — 602 10,334 27,703 38,037 4,553 12/11/2014 Park Oaks Shopping Center, CA — 8,527 38,064 — 569 8,527 38,633 47,160 5,934 1/6/2016 Ontario Plaza, CA — 9,825 26,635 — 1,470 9,825 28,105 37,930 4,644 1/6/2015 Winston Manor, CA — 10,018 9,762 — 2,132 10,018 11,894 21,912 2,053 1/7/2015 Jackson Square, CA — 6,886 24,558 — 1,111 6,886 25,669 32,555 3,632 7/1/2015 Tigard Promenade, OR — 9,844 10,843 — 245 9,844 11,088 20,932 1,517 7/28/2015 Sunnyside Village Square, OR — 4,428 13,324 — 3,856 4,428 17,180 21,608 2,875 7/28/2015 Gateway Centre, CA — 16,275 28,308 — 4,178 16,275 32,486 48,761 4,231 9/1/2015 Johnson Creek Center, OR — 9,009 22,534 — 1,391 9,009 23,925 32,934 3,308 11/9/2015 Iron Horse Plaza, CA — 8,187 39,654 11 2,519 8,198 42,173 50,371 4,732 12/4/2015 Bellevue Marketplace, WA — 10,488 39,119 — 10,162 10,488 49,281 59,769 5,515 12/10/2015 Four Corner Square, WA — 9,926 31,415 — 491 9,926 31,906 41,832 4,106 12/21/2015 Warner Plaza, CA — 16,104 60,188 — 9,266 16,104 69,454 85,558 8,460 12/31/2015 Magnolia Shopping Center, CA — 12,501 27,040 — 2,046 12,501 29,086 41,587 3,621 3/10/2016 Initial Cost to Company Cost Capitalized Subsequent to Acquisition Amount at Which Carried at Close of Period Description and Location Encumbrances Land Building & Land Building & Land Building & Accumulated Depreciation (b) (1) Date of Acquisition Casitas Plaza Shopping Center, CA 7,001 10,734 22,040 — 1,431 10,734 23,471 34,205 2,626 3/10/2016 Bouquet Center, CA — 10,040 48,362 — 606 10,040 48,968 59,008 5,373 4/28/2016 North Ranch Shopping Center, CA — 31,522 95,916 — 1,826 31,522 97,742 129,264 9,622 6/1/2016 Monterey Center, CA (2) — 1,073 10,609 — 237 1,073 10,846 11,919 1,080 7/14/2016 Rose City Center, OR (2) — 3,637 10,301 — (78) 3,637 10,223 13,860 987 9/15/2016 The Knolls, CA — 9,726 18,299 — 21 9,726 18,320 28,046 1,827 10/3/2016 Bridle Trails Shopping Center, WA — 11,534 20,700 — 7,906 11,534 28,606 40,140 2,586 10/17/2016 Torrey Hills Corporate Center, CA — 5,579 3,915 — 2,435 5,579 6,350 11,929 1,320 12/6/2016 PCC Community Markets Plaza, WA — 1,856 6,914 — 7 1,856 6,921 8,777 657 1/25/2017 The Terraces, CA — 18,378 37,103 — 1,423 18,378 38,526 56,904 3,291 3/17/2017 Santa Rosa Southside Shopping Center, CA — 5,595 24,453 — 1,788 5,595 26,241 31,836 2,057 3/24/2017 Division Center, OR — 6,917 26,098 — 2,086 6,917 28,184 35,101 2,353 4/5/2017 Highland Hill Shopping Center, WA — 10,511 37,825 29 382 10,540 38,207 48,747 3,210 5/9/2017 Monta Loma Plaza, CA — 18,226 11,113 — 140 18,226 11,253 29,479 784 9/19/2017 Fullerton Crossroads, CA 26,000 28,512 45,419 — 476 28,512 45,895 74,407 3,205 10/11/2017 Riverstone Marketplace, WA 17,656 5,113 27,594 — 277 5,113 27,871 32,984 1,876 10/11/2017 North Lynnwood Shopping Center, WA — 4,955 10,335 9 710 4,964 11,045 16,009 766 10/19/2017 The Village at Nellie Gail Ranch, CA — 22,730 22,578 — 1,387 22,730 23,965 46,695 1,528 11/30/2017 Stadium Center, WA — 1,699 17,229 7 87 1,706 17,316 19,022 861 2/23/2018 King City Plaza, OR — 5,161 10,072 — 43 5,161 10,115 15,276 570 5/18/2018 Summerwalk Village, WA — 2,320 9,281 — 4 2,320 9,285 11,605 20 12/13/2019 $ 86,157 $ 878,022 $ 2,023,831 $ 1,518 $ 228,470 $ 879,540 $ 2,252,301 $ 3,131,841 $ 390,916 a. RECONCILIATION OF REAL ESTATE – OWNED SUBJECT TO OPERATING LEASES (in thousands) Year Ended December 31, 2019 2018 2017 Balance at beginning of period: $ 3,160,472 $ 3,109,397 $ 2,687,018 Property improvements during the year 37,985 40,300 54,481 Properties acquired during the year 11,601 43,387 374,004 Properties sold during the year (69,056) (24,427) — Assets written off during the year (9,161) (8,185) (6,106) Balance at end of period: $ 3,131,841 $ 3,160,472 $ 3,109,397 b. RECONCILIATION OF ACCUMULATED DEPRECIATION (in thousands) Year Ended December 31, 2019 2018 2017 Balance at beginning of period: $ 329,207 $ 260,115 $ 193,021 Depreciation expenses 82,419 81,107 72,725 Properties sold during the year (10,775) (3,551) — Property assets fully depreciated and written off (9,935) (8,464) (5,631) Balance at end of period: $ 390,916 $ 329,207 $ 260,115 (1) Depreciation and investments in building and improvements reflected in the consolidated statements of operations is calculated over the estimated useful life of the assets as follows: Building: 39-40 years Property Improvements: 10-20 years (2) Property, or a portion thereof, is subject to a ground lease. (3) The aggregate cost for Federal Income Tax Purposes for real estate was approximately $2.9 billion at December 31, 2019.

Schedule IV - Mortgage Loans on

Schedule IV - Mortgage Loans on Real Estate	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Schedule IV - Mortgage Loans on Real Estate	SCHEDULE IV – MORTGAGE LOANS ON REAL ESTATE December 31, 2019 (in thousands) a. RECONCILIATION OF MORTGAGE LOANS ON REAL ESTATE (in thousands) Year Ended December 31, 2019 2018 2017 Balance at beginning of period: $ — $ — $ — Mortgage loans acquired during the current period 13,250 — — Repayments on mortgage note receivable (250) — — Balance at end of period: $ 13,000 $ — $ —

Organization, Basis of Presen_2

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standard Update (“ASU”) No. 2016-2, “Leases.” ASU No. 2016-2 resulted in the recognition of a right-to-use asset and related liability to account for future obligations under ground lease agreements for which the Company is the lessee. In addition, this ASU requires that lessees and lessors capitalize, as initial direct costs, only those costs that are incurred due to the execution of a lease. Allocated payroll costs and other costs that are incurred regardless of whether the lease is obtained are no longer capitalized as initial direct costs and instead are expensed as incurred. Under ASU No. 2016-2, each lease agreement will be evaluated to identify the lease components and nonlease components at lease inception. The total consideration in the lease agreement will be allocated to the lease and nonlease components based on their relative standalone selling prices. Lessors will continue to recognize the lease revenue component using an approach that is substantially equivalent to existing guidance for operating leases (straight-line basis). In July 2018, the FASB issued an amendment to ASU No. 2016-2 that allows lessors to elect, as a practical expedient, not to allocate the total consideration to lease and nonlease components based on their relative standalone selling prices. This practical expedient allows lessors to elect a combined single lease component presentation if (i) the timing and pattern of the revenue recognition of the combined single lease component is the same, and (ii) the related lease component and, the combined single lease component would be classified as an operating lease. The amendment also provides a transition option that permits the application of the new guidance as of the adoption date rather than to all periods presented. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company adopted the provisions of ASU No. 2016-2 effective January 1, 2019 using the modified retrospective approach and accordingly, recognized a lease liability of approximately $18.0 million, which is included in Other liabilities in the accompanying balance sheet, and a related right-to-use asset of approximately $17.0 million, which is included in Other assets in the accompanying balance sheet, for all operating leases in which the Company is a lessee based on the present value of the minimum rental payments remaining as of the initial application date. The present value of the remaining lease payments was calculated for each operating lease using each respective remaining lease term and a corresponding estimated incremental borrowing rate, which is the interest rate that the Company estimates it would have to pay to borrow on a collateralized basis over a similar term. Based on its election of the package of practical expedients, the Company was not required to reassess whether any expired or existing contracts are or contain leases, reassess the lease classification for any expired or existing leases, or reassess initial direct costs for any existing leases. Accordingly, the Company’s ground lease agreements for which the Company is the lessee will continue to be accounted for as operating leases under the new standard. Further, the Company elected the practical expedient to account for both its lease and non-lease components as a combined single lease component and elected the optional transition method permitting January 1, 2019 to be its initial application date. Additionally, leasing payroll-related costs that are incurred regardless of whether leases are obtained are no longer capitalized as initial direct costs and instead are expensed as incurred. These costs amounted to approximately $1.3 million and $1.2 million during the years ended December 31, 2018 and 2017, respectively. Further, bad debt, which has previously been recorded in Property operating, has now been classified as a contra-revenue account in Rental revenue in the Company’s consolidated statements of operations and comprehensive income. In June 2016, the FASB issued ASU No. 2016-13 “Financial Instruments - Credit Topics.” ASU No. 2016-13 requires companies to adopt a new approach to estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans. The standard requires entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables. ASU No. 2016-13 will be effective for the Company beginning on January 1, 2020, with early adoption permitted. The Company does not expect that the adoption of this pronouncement will have a material impact on the consolidated financial statements.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements are prepared on the accrual basis in accordance with GAAP. In the opinion of management, the consolidated financial statements include all adjustments necessary, which are of a normal and recurring nature, for the fair presentation of the Company’s financial position and the results of operations and cash flows for the periods presented. The consolidated financial statements include the accounts of the Company and those of its subsidiaries, which are wholly-owned or controlled by the Company. Entities which the Company does not control through its voting interest and entities which are variable interest entities (“VIEs”), but where it is not the primary beneficiary, are accounted for under the equity method. All significant intercompany balances and transactions have been eliminated. The Company follows the FASB guidance for determining whether an entity is a VIE and requires the performance of a qualitative rather than a quantitative analysis to determine the primary beneficiary of a VIE. Under this guidance, an entity would be required to consolidate a VIE if it has (i) the power to direct the activities that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. The Company has concluded that the Operating Partnership is a VIE, and because they have both the power and the rights to control the Operating Partnership, they are the primary beneficiary and are required to continue to consolidate the Operating Partnership. A non-controlling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Non-controlling interests are required to be presented as a separate component of equity in the consolidated balance sheet and modify the presentation of net income by requiring earnings and other comprehensive income to be attributed to controlling and non-controlling interests.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the disclosure of contingent assets and liabilities, the reported amounts of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the periods covered by the financial statements. The most significant assumptions and estimates relate to the recoverability of assets to be held and used, purchase price allocations, depreciable lives, revenue recognition and the collectability of tenant receivables, other receivables, notes receivables, the valuation of performance-based restricted stock, LTIPs, and derivatives. Actual results could differ from these estimates.
Federal Income Taxes	Federal Income Taxes The Company has elected to qualify as a REIT under Sections 856-860 of the Internal Revenue Code (the “Code”). Under those sections, a REIT that, among other things, distributes at least 90% of its REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gains) and meets certain other qualifications prescribed by the Code, will not be taxed on that portion of its taxable income that is distributed. Although it may qualify as a REIT for U.S. federal income tax purposes, the Company is subject to state income or franchise taxes in certain states in which some of its properties are located. For all periods from inception through September 26, 2013 the Operating Partnership had been an entity disregarded from its sole owner, ROIC, for U.S. federal income tax purposes and as such had not been subject to U.S. federal income taxes. Effective September 27, 2013, the Operating Partnership issued OP Units in connection with the acquisitions of two shopping centers. Accordingly, the Operating Partnership ceased being a disregarded entity and instead is being treated as a partnership for U.S. federal income tax purposes. The Company follows the FASB guidance that defines a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The FASB also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company records interest and penalties relating to unrecognized tax benefits, if any, as interest expense. As of December 31, 2019, the statute of limitations for tax years 2016 through and including 2018 remain open for examination by the Internal Revenue Service (“IRS”) and state taxing authorities. ROIC intends to make regular quarterly distributions to holders of its common stock. U.S. federal income tax law generally requires that a REIT distribute annually at least 90% of its REIT taxable income, without regard to the deduction for dividends paid and excluding net capital gains, and that it pay U.S. federal income tax at regular corporate rates to the extent that it annually distributes less than 100% of its net taxable income. ROIC intends to pay regular quarterly dividends to stockholders in an amount not less than its net taxable income, if and to the extent authorized by its board of directors. Before ROIC pays any dividend, whether for U.S. federal income tax purposes or otherwise, it must first meet both its operating requirements and its debt service on debt. If ROIC’s cash available for distribution is less than its net taxable income, it could be required to sell assets or borrow funds to make cash distributions or it may make a portion of the required distribution in the form of a taxable stock distribution or distribution of debt securities.
Real Estate Investments	Real Estate Investments All costs related to the improvement or replacement of real estate properties are capitalized. Additions, renovations and improvements that enhance and/or extend the useful life of a property are also capitalized. Expenditures for ordinary maintenance, repairs and improvements that do not materially prolong the normal useful life of an asset are charged to operations as incurred. During the years ended December 31, 2019 and 2018, capitalized costs related to the improvement or replacement of real estate properties were approximately $38.0 million and $40.3 million, respectively. The Company evaluates each acquisition of real estate to determine if the acquired property meets the definition of a business and needs to be accounted for as a business combination. Under ASU No. 2017-1, the Company first determines whether substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If this threshold is met, the acquired property does not meet the definition of a business and is accounted for as an asset acquisition. The Company expects that acquisitions of real estate properties will not meet the revised definition of a business because substantially all of the fair value is concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets). The Company recognizes the acquisition of real estate properties, including acquired tangible assets (consisting of land, buildings and improvements), and acquired intangible assets and liabilities (consisting of above-market and below-market leases and acquired in-place leases) at their fair value (for acquisitions meeting the definition of a business) and relative fair value (for acquisitions not meeting the definition of a business). The relative fair values used to allocate the cost of an asset acquisition are determined using the same methodologies and assumptions the Company utilizes to determine fair value in a business combination. Acquired lease intangible assets include above-market leases and acquired in-place leases, and acquired lease intangible liabilities represent below-market leases, in the accompanying consolidated balance sheets. The fair value of the tangible assets of an acquired property is determined by valuing the property as if it were vacant, which value is then allocated to land, buildings and improvements based on management’s determination of the relative fair values of these assets. In valuing an acquired property’s intangibles, factors considered by management include an estimate of carrying costs during the expected lease-up periods, and estimates of lost rental revenue during the expected lease-up periods based on management’s evaluation of current market demand. Management also estimates costs to execute similar leases, including leasing commissions, tenant improvements, legal and other related costs. Leasing commissions, legal and other related costs (“lease origination costs”) are classified as Deferred charges in the accompanying consolidated balance sheets. The value of in-place leases is measured by the excess of (i) the purchase price paid for a property after adjusting existing in-place leases to market rental rates, over (ii) the estimated fair value of the property as if vacant. Above-market and below-market lease values are recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between the contractual amounts to be received and management’s estimate of market lease rates, measured over the terms of the respective leases that management deemed appropriate at the time of acquisition. Such
Asset Impairment	Asset Impairment
Cash and Cash Equivalents	Cash and Cash Equivalents
Restricted Cash	Restricted Cash The terms of the Company’s mortgage loans payable may require the Company to deposit certain replacement and other reserves with its lenders. Such “restricted cash” is generally available only for property-level requirements for which the reserves have been established and is not available to fund other property level or Company level obligations.
Revenue Recognition	Revenue Recognition Management has determined that all of the Company’s leases with its various tenants are operating leases. Rental income is generally recognized based on the terms of leases entered into with tenants. In those instances in which the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. When the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition and lease incentive amortization when possession or control of the space is turned over to the tenant for tenant work to begin. Minimum rental income from leases with scheduled rent increases is recognized on a straight-line basis over the lease term. Percentage rent is recognized when a specific tenant’s sales breakpoint is achieved. Prior to January 1, 2019, the Company considered property operating expense recoveries from tenants of common area maintenance, real estate taxes and other recoverable costs as lease components. Effective January 1, 2019, each lease agreement is evaluated to identify the lease and nonlease components at lease inception. The Company elected the single component practical expedient, which allows lessors to elect a combined single lease component presentation if (i) the timing and pattern of the revenue recognition of the combined single lease component is the same, and (ii) the related lease component and, the combined single lease component would be classified as an operating lease. As a result of this assessment, rental revenues and tenant recoveries from the lease of real estate assets are accounted for as a single component. Lease incentives are amortized as a reduction of rental revenue over the respective tenant lease terms. Termination fees (included in Other income in the consolidated statements of operations and comprehensive income) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees when the following conditions are met: (a) the termination agreement is executed; (b) the termination fee is determinable; (c) all landlord services pursuant to the terminated lease have been rendered; and (d) collectability of the termination fee is assured. Interest income is recognized as it is earned. Gains or losses on disposition of properties are recorded when the criteria for recognizing such gains or losses have been met.
Depreciation and Amortization	Depreciation and Amortization The Company uses the straight-line method for depreciation and amortization. Buildings are depreciated over estimated useful lives which the Company estimates to be 39-40 years. Property improvements are depreciated over estimated useful lives that range from 10 to 20 years. Furniture and fixtures are depreciated over the estimated useful lives that range from 3 to 10 years. Tenant improvements are amortized over the shorter of the life of the related leases or their useful life.
Deferred Charges	Deferred Leasing and Financing Costs Costs incurred in obtaining tenant leases (principally leasing commissions and acquired lease origination costs) are amortized ratably over the life of the tenant leases. Costs incurred in obtaining long-term financing are amortized ratably over the related debt agreement. The amortization of deferred leasing and financing costs is included in Depreciation and amortization and Interest expense and other finance expenses, respectively, in the consolidated statements of operations and comprehensive income.
Concentration Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and tenant receivables. The Company places its cash and cash equivalents in excess of insured amounts with high quality financial institutions. The Company performs ongoing credit evaluations of its tenants and requires tenants to provide security deposits.
Earnings Per Share	Earnings Per Share Basic earnings per share (“EPS”) excludes the impact of dilutive shares and is computed by dividing net income by the weighted average number of shares of common stock outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue shares of common stock were exercised or converted into shares of common stock and then shared in the earnings of the Company. For the years ended December 31, 2019, 2018 and 2017, basic EPS was determined by dividing net income allocable to common stockholders for the applicable period by the weighted average number of shares of common stock outstanding during
Share-based Compensation	Stock-Based Compensation The Company has a stock-based employee compensation plan, which is more fully described in Note 8. The Company accounts for its stock-based compensation plan based on the FASB guidance which requires that compensation expense be recognized based on the fair value of the stock awards less forfeitures. Restricted stock grants vest based upon the completion of a service period (“time-based restricted stock grants”) and/or the Company meeting certain established market-indexed financial performance criteria (“performance-based restricted stock grants”). Time-based grants are valued according to the market price for the Company’s common stock at the date of grant. For performance-based restricted stock grants, a Monte Carlo valuation model is used, taking into account the underlying contingency risks associated with the performance criteria. It is the Company’s policy to grant options with an exercise price equal to the quoted closing market price of stock on the grant date. The Company has made certain separate awards in the form of units of limited partnership interests in its Operating Partnership called LTIP Units. The LTIP Units are subject to such conditions and restrictions as the compensation committee may determine, including continued employment or service, achievement of pre-established operational performance goals and market-indexed performance criteria. For the LTIP Units subject to market-indexed performance criteria (the “marked-indexed LTIP Units”), a Monte Carlo valuation model is used, taking into account the underlying contingency risks associated with the performance criteria. All other LTIP Units (the “operational LTIP Units”) are valued according to the market price of the Company’s common stock at the date of grant.
Derivatives	Derivatives The Company records all derivatives on the balance sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged forecasted transactions in a cash flow hedge. When the Company terminates a derivative for which cash flow hedging was being applied, the balance, which was recorded in Other comprehensive income, is amortized to interest expense over the remaining contractual term of the derivative as long as the hedged forecasted transactions continue to be probable of occurring. The Company includes cash payments made to terminate interest rate derivatives as an operating activity on the statement of cash flows, given the nature of the underlying cash flows that the derivative was hedging.
Segment Reporting	Segment Reporting The Company’s primary business is the ownership, management, and redevelopment of retail real estate properties. The Company reviews operating and financial information for each property on an individual basis and therefore, each property represents an individual operating segment. The Company evaluates financial performance using property operating income, defined as operating revenues (base rent and recoveries from tenants), less property and related expenses (property operating expenses and property taxes). The Company has aggregated the properties into one reportable segment as the properties share similar long-term economic characteristics and have other similarities including the fact that they are operated using consistent business strategies, are typically located in major metropolitan areas, and have similar tenant mixes.
Reclassifications	ReclassificationsCertain reclassifications have been made to the prior period consolidated financial statements and notes to conform to the current year presentation. In connection with the adoption of ASU No. 2016-2 and the Company’s practical expedient election to have a combined single lease component presentation, the Company combined Base rents and Recoveries from tenants into a single line item, Rental revenues, in its consolidated statements of operations and comprehensive income.

Organization, Basis of Presen_3

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) [Line Items]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure	The unamortized balances of deferred leasing costs included in deferred charges in the Consolidated Balance Sheets as of December 31, 2019 that will be charged to future operations are as follows (in thousands): Lease Origination Costs 2020 $ 5,804 2021 4,922 2022 4,115 2023 3,261 2024 2,523 Thereafter 7,027 $ 27,652
Schedule of Cash Flow, Supplemental Disclosures	The following tables provides supplemental disclosures related to the consolidated statements of cash flows (in thousands): Year Ended December 31, 2019 2018 2017 Supplemental disclosure of cash activities: Cash paid on gross receipts and income for federal and state purposes $ 275 $ 291 $ 253 Interest paid $ 60,319 $ 60,494 $ 46,271 Other non-cash investing and financing activities increase (decrease): Issuance of OP Units in connection with acquisitions $ — $ — $ 49,599 Fair value of assumed mortgages upon acquisition $ — $ — $ 46,801 Intangible lease liabilities $ — $ 1,680 $ 48,684 Interest rate swap asset $ (4,931) $ 610 $ 3,446 Interest rate swap liabilities $ 3,285 $ 580 $ — Accrued real estate improvement costs $ 3,222 $ 2,200 $ 3,568 Equity redemption of OP Units $ 2,632 $ — $ 50,155 Disposition of real estate through issuance of mortgage note $ 13,250 $ — $ —
ROIC
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) [Line Items]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the reconciliation between basic and diluted EPS for ROIC (in thousands, except share data): Year Ended December 31, 2019 2018 2017 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less income attributable to non-controlling interests (4,839) (4,405) (4,211) Less earnings allocated to unvested shares (453) (401) (319) Net income available for common stockholders, basic $ 48,391 $ 42,335 $ 38,158 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less earnings allocated to unvested shares (453) (401) (319) Net income available for common stockholders, diluted $ 53,230 $ 46,740 $ 42,369 Denominator: Denominator for basic EPS – weighted average common equivalent shares 114,177,528 112,645,490 109,400,123 OP units 11,334,408 11,626,312 12,060,835 Performance-based restricted stock awards and LTIP Units 206,100 183,683 153,807 Stock options 23,450 103,408 129,066 Denominator for diluted EPS – weighted average common equivalent shares 125,741,486 124,558,893 121,743,831
Retail Opportunity Investments Partnership L.P.
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) [Line Items]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the reconciliation between basic and diluted earnings per unit for the Operating Partnership (in thousands, except unit data): Year Ended December 31, 2019 2018 2017 Numerator: Net income $ 53,683 $ 47,141 $ 42,688 Less earnings allocated to unvested shares (453) (401) (319) Net income available to unitholders, basic and diluted $ 53,230 $ 46,740 $ 42,369 Denominator: Denominator for basic earnings per unit – weighted average common equivalent units 125,511,936 124,271,802 121,460,958 Performance-based restricted stock awards and LTIP Units 206,100 183,683 153,807 Stock options 23,450 103,408 129,066 Denominator for diluted earnings per unit – weighted average common equivalent units 125,741,486 124,558,893 121,743,831

Real Estate Investments (Tables

Real Estate Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Schedule of purchase price allocation	The financial information set forth below summarizes the Company’s purchase price allocation for the properties acquired during the years ended December 31, 2019 and 2018 (in thousands). December 31, 2019 2018 Assets Land $ 2,320 $ 7,666 Building and improvements 9,281 35,629 Acquired lease intangible asset — 1,763 Deferred charges — 818 Assets acquired $ 11,601 $ 45,876 Liabilities Acquired lease intangible liability — 1,680 Liabilities assumed $ — $ 1,680
Condensed Income Statement	The following table summarizes the operating results included in the Company’s historical consolidated statement of operations for the year ended December 31, 2018 for the properties acquired during the year ended December 31, 2018 (in thousands). Year Ended December 31, 2018 Statement of operations: Revenues $ 2,343 Net income attributable to Retail Opportunity Investments Corp. $ 753

Acquired Lease Intangibles (Tab

Acquired Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2019
Acquired Lease Intangibles (Tables) [Line Items]
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	Intangible assets and liabilities as of December 31, 2019 and 2018 consisted of the following (in thousands): December 31, 2019 2018 Assets: In-place leases $ 77,910 $ 92,354 Accumulated amortization (31,686) (36,835) Above-market leases 25,039 30,093 Accumulated amortization (11,562) (13,503) Acquired lease intangible assets, net $ 59,701 $ 72,109 Liabilities: Below-market leases $ 198,272 $ 217,212 Accumulated amortization (53,515) (51,066) Acquired lease intangible liabilities, net $ 144,757 $ 166,146
Acquired Lease Intangible Assets
Acquired Lease Intangibles (Tables) [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The scheduled future amortization of acquired lease intangible assets as of December 31, 2019 is as follows (in thousands): Year Ending December 31: 2020 $ 5,179 2021 4,138 2022 3,440 2023 2,862 2024 2,458 Thereafter 41,624 Total future amortization of acquired lease intangible assets $ 59,701
Acquired Lease Intangible Liabilities
Acquired Lease Intangibles (Tables) [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The scheduled future amortization of acquired lease intangible liabilities as of December 31, 2019 is as follows (in thousands): Year Ending December 31: 2020 $ 12,289 2021 11,123 2022 10,229 2023 9,485 2024 9,324 Thereafter 92,307 Total future amortization of acquired lease intangible liabilities $ 144,757

Tenant Leases (Tables)

Tenant Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Schedule of Future Minimum Base Rentals on NonCancellable Operating Leases	Future minimum rents to be received under non-cancellable leases as of December 31, 2019 are summarized as follows (in thousands): Year Ending December 31: 2020 $ 201,202 2021 183,897 2022 159,296 2023 130,882 2024 99,572 Thereafter 415,762 Total minimum lease payments $ 1,190,611

Mortgage Notes Payable, Credi_2

Mortgage Notes Payable, Credit Facilities and Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Debt	The mortgage notes payable collateralized by respective properties and assignment of leases at December 31, 2019 and December 31, 2018, respectively, were as follows (in thousands, except interest rates): Maturity Date Interest Rate December 31, Property 2019 2018 Casitas Plaza Shopping Center June 2022 5.320 % $ 7,001 $ 7,158 Riverstone Marketplace July 2022 4.960 % 17,656 18,050 Fullerton Crossroads April 2024 4.728 % 26,000 26,000 Diamond Hills Plaza October 2025 3.550 % 35,500 35,500 86,157 86,708 Mortgage premiums 1,594 2,074 Net unamortized deferred financing costs (228) (271) Total mortgage notes payable $ 87,523 $ 88,511
Schedule of Maturities of Long-term Debt	The combined aggregate principal maturities of mortgage notes payable during the next five years and thereafter are as follows (in thousands): Principal Repayments Scheduled Amortization Mortgage Premium Total 2020 $ — $ 577 $ 481 $ 1,058 2021 — 717 481 1,198 2022 23,129 1,003 344 24,476 2023 — 686 216 902 2024 26,000 708 72 26,780 Thereafter 32,787 550 — 33,337 Total $ 81,916 $ 4,241 $ 1,594 $ 87,751 The combined aggregate principal maturities of the Company’s unsecured senior notes payable during the next five years and thereafter are as follows (in thousands): Principal Repayments 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 450,000 Total $ 950,000
Schedule of Long-term Debt Instruments	The carrying values of the Company’s unsecured term loan (the “term loan”) were as follows (in thousands): December 31, 2019 2018 Term loan $ 300,000 $ 300,000 Net unamortized deferred financing costs (1,670) (924) Term loan $ 298,330 $ 299,076 The carrying values of the Company’s unsecured revolving credit facility were as follows (in thousands): December 31, 2019 2018 Credit facility $ 84,000 $ 156,000 Net unamortized deferred financing costs (3,257) (2,311) Credit facility $ 80,743 $ 153,689 The carrying value of the Company’s unsecured Senior Notes Due 2027 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Net unamortized deferred financing costs (998) (1,123) Senior Notes Due 2027 $ 249,002 $ 248,877 The carrying value of the Company’s unsecured Senior Notes Due 2026 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 200,000 $ 200,000 Net unamortized deferred financing costs (191) (219) Senior Notes Due 2026 $ 199,809 $ 199,781 The carrying value of the Company’s unsecured Senior Notes Due 2024 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (1,912) (2,252) Net unamortized deferred financing costs (1,094) (1,314) Senior Notes Due 2024 $ 246,994 $ 246,434 The carrying value of the Company’s unsecured Senior Notes Due 2023 is as follows (in thousands): December 31, 2019 2018 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (1,915) (2,339) Net unamortized deferred financing costs (1,040) (1,304) Senior Notes Due 2023 $ 247,045 $ 246,357
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure	The unamortized balances of deferred financing costs associated with the Company’s term loan, unsecured revolving credit facility, Senior Notes Due 2027, Senior Notes Due 2026, Senior Notes Due 2024, Senior Notes Due 2023, and mortgage notes payable included as a direct reduction from the carrying amount of the related debt instrument in the consolidated balance sheets as of December 31, 2019 that will be charged to future operations during the next five years and thereafter are as follows (in thousands): Financing Costs 2020 $ 1,799 2021 1,799 2022 1,796 2023 1,781 2024 836 Thereafter 467 $ 8,478

Stock Compensation and Other _2

Stock Compensation and Other Benefit Plans for ROIC (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	Shares Weighted Average Non-vested as of December 31, 2018 1,002,835 $ 16.88 Granted 354,161 $ 17.20 Vested (364,913) $ 19.06 Forfeited (37,286) $ 12.97 Non-vested as of December 31, 2019 954,797 $ 16.55

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	The following is a summary of the terms of the Company’s current interest rate swaps as of December 31, 2019 (in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Interest Rate Swap Agreements: Bank of Montreal $ 100,000 12/29/2017 8/31/2022 U.S. Bank $ 100,000 12/29/2017 8/31/2022 Regions Bank $ 50,000 1/31/2019 8/31/2022 Royal Bank of Canada $ 50,000 1/31/2019 8/31/2022
Schedule of Derivative Assets and Liabilities at Fair Value	The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands). Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total December 31, 2019: Liabilities Derivative financial instruments $ — $ (3,865) $ — $ (3,865) December 31, 2018: Assets Derivative financial instruments $ — $ 4,931 $ — $ 4,931 Liabilities Derivative financial instruments $ — $ (580) $ — $ (580)
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location	The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the balance sheet as of December 31, 2019 and 2018, respectively (in thousands): Derivatives designed as hedging instruments Balance sheet location December 31, 2019 Fair Value December 31, 2018 Fair Value Interest rate products Other assets $ — $ 4,931 Interest rate products Other liabilities $ (3,865) $ (580)
Derivative Instruments, Gain (Loss)	The table below details the location in the financial statements of the gain or loss recognized on interest rate derivatives designated as cash flow hedges for the years ended December 31, 2019, 2018, and 2017, respectively (in thousands). Amounts reclassified from other comprehensive income (“OCI”) due to ineffectiveness are recognized as interest expense. Year Ended December 31, 2019 2018 2017 Amount of (loss) gain recognized in OCI on derivatives $ (7,348) $ 1,648 $ 3,665 Amount of (gain) loss reclassified from AOCI into interest $ (345) $ 57 $ 1,920

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	The following table represents a reconciliation of the Company’s undiscounted future minimum annual lease payments under operating leases to the lease liability as of December 31, 2019 (in thousands): Operating Leases 2020 $ 1,287 2021 1,282 2022 1,304 2023 1,330 2024 1,335 Thereafter 32,604 Total undiscounted future minimum lease payments 39,142 Future minimum lease payments, discount (21,467) Lease liability $ 17,675

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Results of Operations (Unaudited) (Tables) [Line Items]
Schedule of Quarterly Financial Information	The unaudited quarterly results of operations for the years ended December 31, 2019 and 2018 for ROIC are as follows (in thousands, except share data): Year Ended December 31, 2019 March 31 June 30 September 30 December 31 Total revenues $ 76,053 $ 72,930 $ 72,438 $ 73,619 Net income $ 14,583 $ 8,346 $ 19,628 $ 11,126 Net income attributable to ROIC $ 13,250 $ 7,585 $ 17,858 $ 10,151 Basic and diluted income per share $ 0.12 $ 0.07 $ 0.16 $ 0.09 Year Ended December 31, 2018 March 31 June 30 September 30 December 31 Total revenues $ 74,395 $ 72,341 $ 73,904 $ 75,158 Net income $ 11,824 $ 8,102 $ 15,647 $ 11,568 Net income attributable to ROIC $ 10,702 $ 7,339 $ 14,194 $ 10,501 Basic and diluted income per share $ 0.09 $ 0.06 $ 0.12 $ 0.09
Retail Opportunity Investments Partnership L.P.
Quarterly Results of Operations (Unaudited) (Tables) [Line Items]
Schedule of Quarterly Financial Information	The unaudited quarterly results of operations for the years ended December 31, 2019 and 2018 for the Operating Partnership are as follows (in thousands, except unit data): Year Ended December 31, 2019 March 31 June 30 September 30 December 31 Total revenues $ 76,053 $ 72,930 $ 72,438 $ 73,619 Net income attributable to the Operating Partnership $ 14,583 $ 8,346 $ 19,628 $ 11,126 Basic and diluted income per unit $ 0.12 $ 0.07 $ 0.16 $ 0.09 Year Ended December 31, 2018 March 31 June 30 September 30 December 31 Total revenues $ 74,395 $ 72,341 $ 73,904 $ 75,158 Net income attributable to the Operating Partnership $ 11,824 $ 8,102 $ 15,647 $ 11,568 Basic and diluted income per unit $ 0.09 $ 0.06 $ 0.12 $ 0.09

Organization, Basis of Presen_4

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 01, 2019USD ($)
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
Lease liability	$ 17,675,000
Payroll related costs capitalized		$ 1,300,000	$ 1,200,000
Taxable income minimum distribution portion not subject to federal taxation (in percentage)	90.00%
Real estate improvements	$ 38,000,000	40,300,000
Acquisition transaction costs	0	0	$ 4,000
Allowance for doubtful accounts receivable	$ 8,200,000	$ 6,900,000
Number of segments | segment	1
Minimum | Building
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	39 years
Minimum | Building Improvements
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	10 years
Minimum | Furniture and Fixtures
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	3 years
Maximum | Building
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	40 years
Maximum | Building Improvements
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	20 years
Maximum | Furniture and Fixtures
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
PPE useful life (in years)	10 years
Accounting Standards Update 2016-02
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
Lease liability				$ 18,000,000
Operating lease, right-of-use asset				$ 17,000,000

Organization, Basis of Presen_5

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges [Line Items]
Deferred charges, net	$ 27,652	$ 33,857
Lease Origination Costs
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges [Line Items]
2020	5,804
2021	4,922
2022	4,115
2023	3,261
2024	2,523
Thereafter	7,027
Deferred charges, net	$ 27,652

Organization, Basis of Presen_6

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Reconciliation Between Basic and Diluted EPS - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income	$ 11,126	$ 19,628	$ 8,346	$ 14,583	$ 11,568	$ 15,647	$ 8,102	$ 11,824	$ 53,683	$ 47,141	$ 42,688
Less income attributable to non-controlling interests									(4,839)	(4,405)	(4,211)
Less earnings allocated to unvested shares, basic									(453)	(401)	(319)
Net income available to common stockholders, basic									48,391	42,335	38,158
Less earnings allocated to unvested shares, diluted									(453)	(401)	(319)
Net income available to common stockholders, diluted									$ 53,230	$ 46,740	$ 42,369
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)									114,177,528	112,645,490	109,400,123
Denominator for diluted EPS – weighted average common equivalent shares (in shares)									125,741,486	124,558,893	121,743,831
Retail Opportunity Investments Partnership L.P.
Numerator:
Net income	$ 11,126	$ 19,628	$ 8,346	$ 14,583	$ 11,568	$ 15,647	$ 8,102	$ 11,824	$ 53,683	$ 47,141	$ 42,688
Less earnings allocated to unvested shares, basic									(453)	(401)	(319)
Net income available to unitholders, basic and diluted									$ 53,230	$ 46,740	$ 42,369
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)									125,511,936	124,271,802	121,460,958
Denominator for diluted EPS – weighted average common equivalent shares (in shares)									125,741,486	124,558,893	121,743,831
OP Units
Denominator:
OP Units (in shares)									11,334,408	11,626,312	12,060,835
Performance-based restricted stock awards and LTIP Units
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)									206,100	183,683	153,807
Performance-based restricted stock awards and LTIP Units | Retail Opportunity Investments Partnership L.P.
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)									206,100	183,683	153,807
Stock options
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)									23,450	103,408	129,066
Stock options | Retail Opportunity Investments Partnership L.P.
Denominator:
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)									23,450	103,408	129,066

Organization, Basis of Presen_7

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Supplemental Cash Flow Disclosure) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other non-cash investing and financing activities [Abstract]
Cash paid on gross receipts and income for federal and state purposes	$ 275	$ 291	$ 253
Interest paid	60,319	60,494	46,271
Issuance of OP Units in connection with acquisitions	0	0	49,599
Fair value of assumed mortgages upon acquisition	0	0	46,801
Intangible lease liabilities	0	1,680	48,684
Interest rate swap asset	(4,931)	610	3,446
Interest rate swap liabilities	3,285	580	0
Accrued real estate improvement costs	3,222	2,200	3,568
Equity redemption of OP Units	2,632	0	50,155
Disposition of real estate through issuance of mortgage note	$ 13,250	$ 0	$ 0

Real Estate Investments (Acquis

Real Estate Investments (Acquisitions) (Details) $ in Thousands	Dec. 13, 2019USD ($)ft²	Dec. 12, 2019USD ($)	Aug. 01, 2019USD ($)	May 01, 2019USD ($)	Feb. 15, 2019USD ($)	Sep. 27, 2018USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)ft²property	Dec. 31, 2017USD ($)
Note 2 - Real Estate Investments (Details) [Line Items]
Adjusted purchase price								$ 35,000
Area of real estate property (in Square Feet) | ft²								112,000
Number of properties acquired | property								2
Proceeds from sale of real estate							$ 58,930	$ 26,880	$ 0
Gain on sale of real estate							13,175	5,890	$ 0
Mortgage note receivable							$ 13,000	$ 0
Summerwalk Village, WA | Lacey, Washington
Note 2 - Real Estate Investments (Details) [Line Items]
Adjusted purchase price	$ 11,600
Area of real estate property (in Square Feet) | ft²	58,000
Vancouver Market Center | Vancouver, Washington
Note 2 - Real Estate Investments (Details) [Line Items]
Sales Price of Property Sold					$ 17,000
Proceeds from sale of real estate					16,000
Gain on sale of real estate					$ 2,600
Norwood Shopping Center | Sacramento, California
Note 2 - Real Estate Investments (Details) [Line Items]
Sales Price of Property Sold				$ 13,500
Gain on sale of real estate				180
Mortgage note receivable				$ 13,300
Mortgage notes receivable, term				4 years
Mortgage notes receivable, interest rate, increase (decrease)				1.00%
Morada Ranch | Stockton, California
Note 2 - Real Estate Investments (Details) [Line Items]
Sales Price of Property Sold			$ 30,000
Proceeds from sale of real estate			29,100
Gain on sale of real estate			$ 10,400
Mission Foothill Marketplace | Mission Viejo, California
Note 2 - Real Estate Investments (Details) [Line Items]
Sales Price of Property Sold		$ 13,600
Proceeds from sale of real estate		$ 13,500
Round Hill Square | Zephyr Cove, Nevada
Note 2 - Real Estate Investments (Details) [Line Items]
Sales Price of Property Sold						$ 28,000
Proceeds from sale of real estate						26,900
Gain on sale of real estate						$ 5,900
Minimum | Norwood Shopping Center
Note 2 - Real Estate Investments (Details) [Line Items]
Mortgage notes receivable, interest rate, stated percentage				3.00%
Maximum | Norwood Shopping Center
Note 2 - Real Estate Investments (Details) [Line Items]
Mortgage notes receivable, interest rate, stated percentage				6.00%

Real Estate Investments (Detail

Real Estate Investments (Details) - Purchase Price Allocation of Properties Acquired - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Land	$ 2,320	$ 7,666
Building and improvements	9,281	35,629
Acquired lease intangible asset	0	1,763
Deferred charges	0	818
Assets acquired	11,601	45,876
Liabilities
Acquired lease intangible liability	0	1,680
Liabilities assumed	$ 0	$ 1,680

Real Estate Investments (Deta_2

Real Estate Investments (Details) - Operating Results Included in the Company's Historical Consolidated Statement of Operations for Properties Acquired During the Reported Periods $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Business Combinations [Abstract]
Revenues	$ 2,343
Net income attributable to Retail Opportunity Investments Corp.	$ 753

Acquired Lease Intangibles (Nar

Acquired Lease Intangibles (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of above and below Market Leases	$ 15,618	$ 13,965	$ 17,078
Amortization of acquired in place leases	$ 8,100	$ 11,400	$ 14,400

Acquired Lease Intangibles (Det

Acquired Lease Intangibles (Details) - Intangible Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Acquired lease intangible assets	$ 59,701	$ 72,109
Acquired lease intangible assets, net	59,701	72,109
Liabilities:
Below-market leases	198,272	217,212
Accumulated amortization	(53,515)	(51,066)
Acquired lease intangible liabilities, net	144,757	166,146
In-place leases
Assets:
Acquired lease intangible assets	77,910	92,354
Accumulated amortization	(31,686)	(36,835)
Above-market leases
Assets:
Acquired lease intangible assets	25,039	30,093
Accumulated amortization	$ (11,562)	$ (13,503)

Acquired Lease Intangibles (D_2

Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 59,701	$ 72,109
Acquired Lease Intangible Assets
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
2020	5,179
2021	4,138
2022	3,440
2023	2,862
2024	2,458
Thereafter	41,624
Acquired lease intangible assets, net	$ 59,701

Acquired Lease Intangibles (D_3

Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities [Line Items]
Acquired lease intangible liabilities, net	$ 144,757	$ 166,146
Acquired Lease Intangible Liabilities
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities [Line Items]
2020	12,289
2021	11,123
2022	10,229
2023	9,485
2024	9,324
Thereafter	92,307
Acquired lease intangible liabilities, net	$ 144,757

Tenant Leases (Details) - Minim

Tenant Leases (Details) - Minimum Future Rentals to be Received under Non-cancellable Leases $ in Thousands	Dec. 31, 2019USD ($)
Leases [Abstract]
2020	$ 201,202
2021	183,897
2022	159,296
2023	130,882
2024	99,572
Thereafter	415,762
Total minimum lease payments	$ 1,190,611

Mortgage Notes Payable, Credi_3

Mortgage Notes Payable, Credit Facilities and Senior Notes (Narrative) (Details)	Dec. 20, 2019USD ($)credit_facility_extension	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Nov. 10, 2017USD ($)	Jul. 26, 2016USD ($)	Dec. 03, 2014USD ($)	Dec. 09, 2013USD ($)
Revolving Credit Facility
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600,000,000
Number of extension options | credit_facility_extension	2
Extension term	6 months
Line of credit facility, commitment fee (in percentage)		0.20%
Line of credit, fronting fee (in percentage)		0.125%
Credit facility		$ 84,000,000	$ 156,000,000
Line of credit facility, interest rate during period (in percentage)		3.30%
Remaining borrowing capacity		$ 516,000,000
Revolving Credit Facility | Accordion Feature
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,200,000,000
Federal Funds Effective Swap Rate | Revolving Credit Facility
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Basis Spread on variable rate (in percentage)		0.50%
Eurodollar | Revolving Credit Facility
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Basis Spread on variable rate (in percentage)		0.90%
Senior Notes
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount		$ 950,000,000
Term Loan Agreement
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount	$ 300,000,000	300,000,000	300,000,000
Additional borrowing capacity	$ 200,000,000
Long-term debt		$ 300,000,000
Interest rate during period (in percentage)		3.40%
Debt Instrument, Swapped Interest Rate		3.00%
Term Loan Agreement | Federal Funds Effective Swap Rate
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Basis Spread on variable rate (in percentage)		0.50%
Term Loan Agreement | Eurodollar
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Basis Spread on variable rate (in percentage)		1.00%
Senior Notes Due 2027 | Senior Notes
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount		$ 250,000,000	250,000,000	$ 250,000,000
Interest Rate (in percentage)				4.19%
Senior Notes Due 2026 | Senior Notes
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount		200,000,000	200,000,000		$ 200,000,000
Interest Rate (in percentage)					3.95%
Senior Notes Due 2024 | Senior Notes
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount		250,000,000	250,000,000			$ 250,000,000
Interest Rate (in percentage)						4.00%
Senior Notes Due 2023 | Senior Notes
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Principal amount		$ 250,000,000	$ 250,000,000				$ 250,000,000
Interest Rate (in percentage)							5.00%

Mortgage Notes Payable, Credi_4

Mortgage Notes Payable, Credit Facilities and Senior Notes - Mortgage Notes Payable (Details) - Notes Payable - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Long-term debt	$ 86,157	$ 86,708
Mortgage premiums	1,594	2,074
Net unamortized deferred financing costs	(228)	(271)
Total mortgage notes payable	$ 87,523	88,511
Casitas Plaza Shopping Center
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	5.32%
Long-term debt	$ 7,001	7,158
Riverstone Marketplace
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	4.96%
Long-term debt	$ 17,656	18,050
Fullerton Crossroads
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	4.728%
Long-term debt	$ 26,000	26,000
Diamond Hills Plaza
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	3.55%
Long-term debt	$ 35,500	$ 35,500

Mortgage Notes Payable, Credi_5

Mortgage Notes Payable, Credit Facilities and Senior Notes - Combined Aggregate Principal Maturities of Mortgage Notes Payable (Details) - Mortgage Notes Payable $ in Thousands	Dec. 31, 2019USD ($)
Principal Repayments
2020	$ 0
2021	0
2022	23,129
2023	0
2024	26,000
Thereafter	32,787
Term loan	81,916
Scheduled Amortization
2020	577
2021	717
2022	1,003
2023	686
2024	708
Thereafter	550
Total	4,241
Mortgage Premium
2020	481
2021	481
2022	344
2023	216
2024	72
Thereafter	0
Total	1,594
Total
2020	1,058
2021	1,198
2022	24,476
2023	902
2024	26,780
Thereafter	33,337
Total mortgage notes payable	$ 87,751

Mortgage Notes Payable, Credi_6

Mortgage Notes Payable, Credit Facilities and Senior Notes - Carrying Value of the Company’s Unsecured Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 20, 2019	Dec. 31, 2018	Nov. 10, 2017	Jul. 26, 2016	Dec. 03, 2014	Dec. 09, 2013
Debt Instrument [Line Items]
Credit facility	$ 80,743,000		$ 153,689,000
Senior Notes	942,850,000		941,449,000
Term Loan Agreement
Debt Instrument [Line Items]
Principal amount	300,000,000	$ 300,000,000	300,000,000
Net unamortized deferred financing costs	(1,670,000)		(924,000)
Term loan	298,330,000		299,076,000
Senior Notes
Debt Instrument [Line Items]
Principal amount	950,000,000
Senior Notes | Senior Notes Due 2027
Debt Instrument [Line Items]
Principal amount	250,000,000		250,000,000	$ 250,000,000
Net unamortized deferred financing costs	(998,000)		(1,123,000)
Senior Notes	249,002,000		248,877,000
Senior Notes | Senior Notes Due 2026
Debt Instrument [Line Items]
Principal amount	200,000,000		200,000,000		$ 200,000,000
Net unamortized deferred financing costs	(191,000)		(219,000)
Senior Notes	199,809,000		199,781,000
Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Principal amount	250,000,000		250,000,000			$ 250,000,000
Unamortized debt discount	(1,912,000)		(2,252,000)
Net unamortized deferred financing costs	(1,094,000)		(1,314,000)
Senior Notes	246,994,000		246,434,000
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Principal amount	250,000,000		250,000,000				$ 250,000,000
Unamortized debt discount	(1,915,000)		(2,339,000)
Net unamortized deferred financing costs	(1,040,000)		(1,304,000)
Senior Notes	247,045,000		246,357,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility	84,000,000		156,000,000
Net unamortized deferred financing costs	(3,257,000)		(2,311,000)
Credit facility	$ 80,743,000		$ 153,689,000

Mortgage Notes Payable, Credi_7

Mortgage Notes Payable, Credit Facilities and Senior Notes Mortgage Notes Payable, Credit Facility and Senior Notes - Principal Repayments of Unsecured Senior Notes (Details) - Senior Notes	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
2020	$ 0
2021	0
2022	0
2023	250,000,000
2024	250,000,000
Thereafter	450,000,000
Total	$ 950,000,000

Mortgage Notes Payable, Credi_8

Mortgage Notes Payable, Credit Facilities and Senior Notes - Amortization of Financing Costs (Details) - Total Debt [Member] $ in Thousands	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
2020	$ 1,799
2021	1,799
2022	1,796
2023	1,781
2024	836
Thereafter	467
Deferred charges, net	$ 8,478

Preferred Stock of ROIC (Detail

Preferred Stock of ROIC (Details) - shares	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares outstanding (in shares)	0	0

Common Stock of ROIC (Narrative

Common Stock of ROIC (Narrative) (Details)	May 01, 2018USD ($)agreement$ / shares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)	Jul. 31, 2013USD ($)
Common Stock and Warrants of ROIC (Details) [Line Items]
Common stock, par value (in usd per share) | $ / shares		$ 0.0001	$ 0.0001
Proceeds from the issuance of common stock		$ 34,162,000	$ 25,703,000	$ 4,481,000
Stock issuance costs		$ 478,000	$ 570,000	$ 1,225,000
Stock repurchase program, authorized amount					$ 50,000,000
Sales Agreement
Common Stock and Warrants of ROIC (Details) [Line Items]
Number of sales agreements | agreement	5
Common stock, par value (in usd per share) | $ / shares	$ 0.0001
Common shares that may be sold under a sales agreement aggregate offering price, maximum	$ 250,000,000
Common stock issued (in shares) | shares		1,861,036	1,251,376
Proceeds from the issuance of common stock		$ 34,200,000	$ 24,200,000
Stock issuance costs		$ 342,000	$ 242,000

Stock Compensation and Other _3

Stock Compensation and Other Benefit Plans for ROIC (Narrative) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2009shares	Apr. 25, 2018shares
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Exercises in period (in shares) | shares	186,000
Exercises in period (in dollars per share) | $ / shares	$ 10.44
Intrinsic value for exercises in period	$ 1,400
Share-based compensation expense	8,600	$ 7,400	$ 6,200
Employer discretionary contribution amount	$ 87	86	70
2009 Equity Incentive Plan
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Percentage of outstanding stock maximum (in percentage)				7.50%
Maximum number of shares (in shares) | shares				4,000,000
Equity Incentive Plan
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Number of shares authorized | shares					22,500,000
Fungible Unit to full value award conversion ratio					6.25
Restricted Stock
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Granted (in shares) | shares	354,161
Granted (in dollars per share) | $ / shares	$ 17.20
Compensation cost not yet recognized	$ 6,100
Compensation cost not yet recognized, period for recognition (in years)	1 year 7 months 6 days
Vested in period, fair value	$ 5,800	$ 5,500	$ 6,300
LTIP Units
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Granted (in dollars per share) | $ / shares	$ 16.27
Compensation cost not yet recognized	$ 2,400
Compensation cost not yet recognized, period for recognition (in years)	2 years
LTIP Units | Vesting on January 1, 2022
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Granted (in shares) | shares	187,279

Stock Compensation and Other _4

Stock Compensation and Other Benefit Plans for ROIC (Details) - Status of Non-vested Restricted Stock Awards - Restricted Stock	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Shares
Beginning balance ( in shares) | shares	1,002,835
Granted (in shares) | shares	354,161
Vested (in shares) | shares	(364,913)
Forfeited (in shares) | shares	(37,286)
Ending balance (in shares) | shares	954,797
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 16.88
Granted (in dollars per share) | $ / shares	17.20
Vested (in dollars per share) | $ / shares	19.06
Forfeited (in dollars per share) | $ / shares	12.97
Ending balance (in dollars per share) | $ / shares	$ 16.55

Capital of the Operating Part_2

Capital of the Operating Partnership (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Capital of the Operating Partnership [Line Items]
Partnership units ( in shares)		127,547,106
Shares outstanding (in shares)		116,496,016	113,992,837
Notices of redemptions received		425,951
Cash redemption of OP Units (in shares)		282,761
Cash redemption for non-controlling interests		$ 5,043	$ 3,713	$ 150
Equity Redemption of OP Units (in shares)		143,190
Common Stock
Capital of the Operating Partnership [Line Items]
Shares outstanding (in shares)		116,496,016	113,992,837	112,347,451	109,301,762
Equity Redemption of OP Units (in shares)		143,190		2,555,933
OP Units
Capital of the Operating Partnership [Line Items]
Non-controlling interest redemption value		$ 191,500
Non-controlling interest redemption value (in usd per share)		$ 17.33
Retail Opportunity Investments Partnership L.P.
Capital of the Operating Partnership [Line Items]
Cash redemption for non-controlling interests		$ 5,043	$ 3,713	$ 150
Limited Partner’s Capital | Retail Opportunity Investments Partnership L.P.
Capital of the Operating Partnership [Line Items]
Partnership units ( in shares)	[1]	11,051,090	11,477,041	11,678,991	11,668,061
Cash redemption of OP Units (in shares)	[1]	282,761	201,950	7,064
Cash redemption for non-controlling interests	[1]	$ 5,043	$ 3,713	$ 150
Equity Redemption of OP Units (in shares)	[1]	(143,190)		(2,555,933)
Retail Opportunity Investments Partnership L.P.
Capital of the Operating Partnership [Line Items]
ROIC ownership percentage in ROIP LP		91.30%
[1]	Consists of limited partnership interests held by third parties.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Schedule) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Weighted Average
Fair Value of Financial Instruments (Details) [Line Items]
Interest rate (in percentage)	3.80%
Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Details) [Line Items]
Notes payable, fair value	$ 87.2
Senior Notes | Significant Unobservable Inputs (Level 3) | Senior Notes Due 2027
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	246.7
Senior Notes | Significant Unobservable Inputs (Level 3) | Senior Notes Due 2026
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	195
Senior Notes | Significant Other Observable Inputs (Level 2) | Senior Notes Due 2024
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	260.4
Senior Notes | Significant Other Observable Inputs (Level 2) | Senior Notes Due 2023
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	$ 269.3

Derivative and Hedging Activi_3

Derivative and Hedging Activities (Assets and liabilities measured at fair value) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
In the next 12 months will be reclassified as an increase to interest expense	$ 1,500
Interest Rate Swap | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset		$ 4,931
Derivative liability	(3,865)	(580)
Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset		0
Derivative liability	0	0
Interest Rate Swap | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset		4,931
Derivative liability	(3,865)	(580)
Interest Rate Swap | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset		0
Derivative liability	0	0
Interest Rate Swap | Other assets | Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset	0	4,931
Interest Rate Swap | Other liabilities | Designated as Hedging Instrument
Derivative [Line Items]
Derivative liability	(3,865)	$ (580)
Interest Rate Swap Maturing 8/31/2022 | Bank of Montreal | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	100,000
Interest Rate Swap Maturing 8/31/2022 | U.S. Bank | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	100,000
Interest Rate Swap Maturing 8/31/2022 | Regions Bank | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	50,000
Interest Rate Swap Maturing 8/31/2022 | Royal Bank of Canada | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	$ 50,000

Derivative and Hedging Activi_4

Derivative and Hedging Activities (Details) - Location of Gain or Loss on Interest Rate Derivatives Designated as Cash Flow Hedges - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of (loss) gain recognized in OCI on derivatives	$ (7,348)	$ 1,648	$ 3,665
Amount of (gain) loss reclassified from AOCI into interest	$ (345)	$ 57	$ 1,920

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended			28 Months Ended
	Sep. 30, 2013	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Commitments and Contingencies (Details) [Line Items]
Operating Lease, Weighted Average Remaining Lease Term		37 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent		5.20%
Operating lease, rent expense		$ 1,600	$ 1,900	$ 1,500
Tax protection agreements, period (in years)					10 years
Litigation settlement, amount awarded to other party		1,400
Litigation settlement expense		$ 950
Terranomics Crossroads Associates LP Member and SARM Five Points LLC
Commitments and Contingencies (Details) [Line Items]
Tax protection agreements, period (in years)	12 years

Commitments and Contingencies_3

Commitments and Contingencies (Details) - Future Minimum Annual Lease Payments Under Operating Leases $ in Thousands	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2020	$ 1,287
2021	1,282
2022	1,304
2023	1,330
2024	1,335
Thereafter	32,604
Total undiscounted future minimum lease payments	39,142
Future minimum lease payments, discount	(21,467)
Lease liability	$ 17,675

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Lease Agreements | General and Administrative Expense
Related Party Transactions (Details) [Line Items]
SG&A expense with related party	$ 84	$ 74	$ 52

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for ROIC - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 73,619	$ 72,438	$ 72,930	$ 76,053	$ 75,158	$ 73,904	$ 72,341	$ 74,395	$ 295,040	$ 295,798	$ 273,260
Net income	11,126	19,628	8,346	14,583	11,568	15,647	8,102	11,824	53,683	47,141	42,688
Net income attributable to ROIC	$ 10,151	$ 17,858	$ 7,585	$ 13,250	$ 10,501	$ 14,194	$ 7,339	$ 10,702	$ 48,844	$ 42,736	$ 38,477
Earnings per share - basic and diluted (in usd per share)	$ 0.09	$ 0.16	$ 0.07	$ 0.12	$ 0.09	$ 0.12	$ 0.06	$ 0.09	$ 0.42	$ 0.38	$ 0.35

Quarterly Results of Operatio_4

Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for the Operating Partnership - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for the Operating Partnership [Line Items]
Total revenues	$ 73,619	$ 72,438	$ 72,930	$ 76,053	$ 75,158	$ 73,904	$ 72,341	$ 74,395	$ 295,040	$ 295,798	$ 273,260
Net income attributable to the Operating Partnership	$ 11,126	$ 19,628	$ 8,346	$ 14,583	$ 11,568	$ 15,647	$ 8,102	$ 11,824	$ 53,683	$ 47,141	$ 42,688
Earnings per unit - basic and diluted (in usd per share)	$ 0.09	$ 0.16	$ 0.07	$ 0.12	$ 0.09	$ 0.12	$ 0.06	$ 0.09	$ 0.42	$ 0.38	$ 0.35
Retail Opportunity Investments Partnership L.P.
Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for the Operating Partnership [Line Items]
Total revenues	$ 73,619	$ 72,438	$ 72,930	$ 76,053	$ 75,158	$ 73,904	$ 72,341	$ 74,395	$ 295,040	$ 295,798	$ 273,260
Net income attributable to the Operating Partnership	$ 11,126	$ 19,628	$ 8,346	$ 14,583	$ 11,568	$ 15,647	$ 8,102	$ 11,824	$ 53,683	$ 47,141	$ 42,688
Earnings per unit - basic and diluted (in usd per share)	$ 0.09	$ 0.16	$ 0.07	$ 0.12	$ 0.09	$ 0.12	$ 0.06	$ 0.09	$ 0.42	$ 0.38	$ 0.35

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	Feb. 18, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Subsequent Events (Details) [Line Items]
Dividends per share (in dollars per share)		$ 0.7880	$ 0.7800	$ 0.7500
Subsequent Event
Subsequent Events (Details) [Line Items]
Dividends per share (in dollars per share)	$ 0.20

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation - Summary (Details) $ in Billions	12 Months Ended
	Dec. 31, 2019USD ($)
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate, Federal Income Tax Basis (in Dollars)	$ 2.9
Minimum | Building
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
PPE useful life (in years)	39 years
Minimum | Building Improvements
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
PPE useful life (in years)	10 years
Maximum | Building
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
PPE useful life (in years)	40 years
Maximum | Building Improvements
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
PPE useful life (in years)	20 years

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation (Details) - Real Estate and Accumulated Depreciation - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Properties [Line Items]
Encumbrances	$ 86,157
Initial Cost to Company, Land	878,022
Initial Cost to Company, Buildings & Improvements	2,023,831
Cost Capitalized Subsequent to Acquisition, Land	1,518
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	228,470
Amount at Which Carried at Close of Period. Land	879,540
Amount at Which Carried at Close of Period, Buildings & Improvements	2,252,301
Total real estate investments	3,131,841	$ 3,160,472	$ 3,109,397	$ 2,687,018
Accumulated Depreciation	390,916
Paramount Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,347
Initial Cost to Company, Buildings & Improvements	10,274
Cost Capitalized Subsequent to Acquisition, Land	530
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,127
Amount at Which Carried at Close of Period. Land	6,877
Amount at Which Carried at Close of Period, Buildings & Improvements	12,401
Total real estate investments	19,278
Accumulated Depreciation	3,997
Santa Ana Downtown Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	7,895
Initial Cost to Company, Buildings & Improvements	9,890
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,029
Amount at Which Carried at Close of Period. Land	7,895
Amount at Which Carried at Close of Period, Buildings & Improvements	13,919
Total real estate investments	21,814
Accumulated Depreciation	3,812
Meridian Valley Plaza, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	1,881
Initial Cost to Company, Buildings & Improvements	4,795
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,757
Amount at Which Carried at Close of Period. Land	1,881
Amount at Which Carried at Close of Period, Buildings & Improvements	6,552
Total real estate investments	8,433
Accumulated Depreciation	2,085
The Market at Lake Stevens, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,087
Initial Cost to Company, Buildings & Improvements	12,397
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	392
Amount at Which Carried at Close of Period. Land	3,087
Amount at Which Carried at Close of Period, Buildings & Improvements	12,789
Total real estate investments	15,876
Accumulated Depreciation	3,782
Pleasant Hill Marketplace, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,359
Initial Cost to Company, Buildings & Improvements	6,927
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,590
Amount at Which Carried at Close of Period. Land	6,359
Amount at Which Carried at Close of Period, Buildings & Improvements	8,517
Total real estate investments	14,876
Accumulated Depreciation	2,765
Happy Valley Town Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	11,678
Initial Cost to Company, Buildings & Improvements	27,011
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,906
Amount at Which Carried at Close of Period. Land	11,678
Amount at Which Carried at Close of Period, Buildings & Improvements	29,917
Total real estate investments	41,595
Accumulated Depreciation	8,317
Cascade Summit Town Square, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,853
Initial Cost to Company, Buildings & Improvements	7,732
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	482
Amount at Which Carried at Close of Period. Land	8,853
Amount at Which Carried at Close of Period, Buildings & Improvements	8,214
Total real estate investments	17,067
Accumulated Depreciation	2,952
Heritage Market Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,595
Initial Cost to Company, Buildings & Improvements	17,399
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	756
Amount at Which Carried at Close of Period. Land	6,595
Amount at Which Carried at Close of Period, Buildings & Improvements	18,155
Total real estate investments	24,750
Accumulated Depreciation	4,751
Claremont Promenade, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,975
Initial Cost to Company, Buildings & Improvements	1,019
Cost Capitalized Subsequent to Acquisition, Land	183
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,388
Amount at Which Carried at Close of Period. Land	6,158
Amount at Which Carried at Close of Period, Buildings & Improvements	5,407
Total real estate investments	11,565
Accumulated Depreciation	2,763
Sycamore Creek, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,747
Initial Cost to Company, Buildings & Improvements	11,584
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	520
Amount at Which Carried at Close of Period. Land	3,747
Amount at Which Carried at Close of Period, Buildings & Improvements	12,104
Total real estate investments	15,851
Accumulated Depreciation	3,949
Gateway Village, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,917
Initial Cost to Company, Buildings & Improvements	27,298
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,247
Amount at Which Carried at Close of Period. Land	5,917
Amount at Which Carried at Close of Period, Buildings & Improvements	28,545
Total real estate investments	34,462
Accumulated Depreciation	7,450
Division Crossing, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,706
Initial Cost to Company, Buildings & Improvements	8,327
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	5,586
Amount at Which Carried at Close of Period. Land	3,706
Amount at Which Carried at Close of Period, Buildings & Improvements	13,913
Total real estate investments	17,619
Accumulated Depreciation	4,482
Halsey Crossing, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Buildings & Improvements	7,773
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	7,793
Amount at Which Carried at Close of Period, Buildings & Improvements	15,566
Total real estate investments	15,566
Accumulated Depreciation	3,701
Marketplace Del Rio,CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	13,420
Initial Cost to Company, Buildings & Improvements	22,251
Cost Capitalized Subsequent to Acquisition, Land	9
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,905
Amount at Which Carried at Close of Period. Land	13,429
Amount at Which Carried at Close of Period, Buildings & Improvements	25,156
Total real estate investments	38,585
Accumulated Depreciation	7,084
Pinole Vista Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	12,894
Initial Cost to Company, Buildings & Improvements	35,689
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	5,941
Amount at Which Carried at Close of Period. Land	12,894
Amount at Which Carried at Close of Period, Buildings & Improvements	41,630
Total real estate investments	54,524
Accumulated Depreciation	7,407
Desert Springs Marketplace, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,517
Initial Cost to Company, Buildings & Improvements	18,761
Cost Capitalized Subsequent to Acquisition, Land	443
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	6,127
Amount at Which Carried at Close of Period. Land	8,960
Amount at Which Carried at Close of Period, Buildings & Improvements	24,888
Total real estate investments	33,848
Accumulated Depreciation	6,022
Mills Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	4,084
Initial Cost to Company, Buildings & Improvements	16,833
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	11,004
Amount at Which Carried at Close of Period. Land	4,084
Amount at Which Carried at Close of Period, Buildings & Improvements	27,837
Total real estate investments	31,921
Accumulated Depreciation	8,990
Renaissance Towne Centre, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,640
Initial Cost to Company, Buildings & Improvements	13,848
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,346
Amount at Which Carried at Close of Period. Land	8,640
Amount at Which Carried at Close of Period, Buildings & Improvements	16,194
Total real estate investments	24,834
Accumulated Depreciation	3,587
Country Club Gate Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,487
Initial Cost to Company, Buildings & Improvements	17,341
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	777
Amount at Which Carried at Close of Period. Land	6,487
Amount at Which Carried at Close of Period, Buildings & Improvements	18,118
Total real estate investments	24,605
Accumulated Depreciation	4,593
Canyon Park Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,352
Initial Cost to Company, Buildings & Improvements	15,916
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	9,013
Amount at Which Carried at Close of Period. Land	9,352
Amount at Which Carried at Close of Period, Buildings & Improvements	24,929
Total real estate investments	34,281
Accumulated Depreciation	6,443
Hawks Prairie Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,334
Initial Cost to Company, Buildings & Improvements	20,694
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,225
Amount at Which Carried at Close of Period. Land	5,334
Amount at Which Carried at Close of Period, Buildings & Improvements	22,919
Total real estate investments	28,253
Accumulated Depreciation	5,505
The Kress Building, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,693
Initial Cost to Company, Buildings & Improvements	20,866
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,839
Amount at Which Carried at Close of Period. Land	5,693
Amount at Which Carried at Close of Period, Buildings & Improvements	25,705
Total real estate investments	31,398
Accumulated Depreciation	7,043
Hillsboro Market Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Buildings & Improvements	17,553
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,713
Amount at Which Carried at Close of Period, Buildings & Improvements	22,266
Total real estate investments	22,266
Accumulated Depreciation	5,240
Gateway Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,242
Initial Cost to Company, Buildings & Improvements	23,462
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	397
Amount at Which Carried at Close of Period. Land	6,242
Amount at Which Carried at Close of Period, Buildings & Improvements	23,859
Total real estate investments	30,101
Accumulated Depreciation	5,318
Euclid Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	7,407
Initial Cost to Company, Buildings & Improvements	7,753
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3,117
Amount at Which Carried at Close of Period. Land	7,407
Amount at Which Carried at Close of Period, Buildings & Improvements	10,870
Total real estate investments	18,277
Accumulated Depreciation	3,470
Green Valley Station, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	1,685
Initial Cost to Company, Buildings & Improvements	8,999
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	785
Amount at Which Carried at Close of Period. Land	1,685
Amount at Which Carried at Close of Period, Buildings & Improvements	9,784
Total real estate investments	11,469
Accumulated Depreciation	2,676
Aurora Square, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,325
Initial Cost to Company, Buildings & Improvements	13,336
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,662
Amount at Which Carried at Close of Period. Land	10,325
Amount at Which Carried at Close of Period, Buildings & Improvements	15,998
Total real estate investments	26,323
Accumulated Depreciation	2,888
Marlin Cove Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,815
Initial Cost to Company, Buildings & Improvements	6,797
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,151
Amount at Which Carried at Close of Period. Land	8,815
Amount at Which Carried at Close of Period, Buildings & Improvements	8,948
Total real estate investments	17,763
Accumulated Depreciation	2,599
Seabridge Marketplace, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,098
Initial Cost to Company, Buildings & Improvements	17,164
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3,584
Amount at Which Carried at Close of Period. Land	5,098
Amount at Which Carried at Close of Period, Buildings & Improvements	20,748
Total real estate investments	25,846
Accumulated Depreciation	4,485
The Village at Novato, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,329
Initial Cost to Company, Buildings & Improvements	4,412
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,833
Amount at Which Carried at Close of Period. Land	5,329
Amount at Which Carried at Close of Period, Buildings & Improvements	6,245
Total real estate investments	11,574
Accumulated Depreciation	1,246
Glendora Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,847
Initial Cost to Company, Buildings & Improvements	8,758
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	298
Amount at Which Carried at Close of Period. Land	5,847
Amount at Which Carried at Close of Period, Buildings & Improvements	9,056
Total real estate investments	14,903
Accumulated Depreciation	2,375
Wilsonville Old Town Square, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	4,181
Initial Cost to Company, Buildings & Improvements	15,394
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,396
Amount at Which Carried at Close of Period. Land	4,181
Amount at Which Carried at Close of Period, Buildings & Improvements	16,790
Total real estate investments	20,971
Accumulated Depreciation	3,440
Bay Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,454
Initial Cost to Company, Buildings & Improvements	14,857
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,084
Amount at Which Carried at Close of Period. Land	5,454
Amount at Which Carried at Close of Period, Buildings & Improvements	15,941
Total real estate investments	21,395
Accumulated Depreciation	3,577
Santa Teresa Village, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	14,965
Initial Cost to Company, Buildings & Improvements	17,162
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	6,500
Amount at Which Carried at Close of Period. Land	14,965
Amount at Which Carried at Close of Period, Buildings & Improvements	23,662
Total real estate investments	38,627
Accumulated Depreciation	5,597
Cypress Center West, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	15,480
Initial Cost to Company, Buildings & Improvements	11,819
Cost Capitalized Subsequent to Acquisition, Land	124
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,051
Amount at Which Carried at Close of Period. Land	15,604
Amount at Which Carried at Close of Period, Buildings & Improvements	13,870
Total real estate investments	29,474
Accumulated Depreciation	3,618
Redondo Beach Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	16,242
Initial Cost to Company, Buildings & Improvements	13,625
Cost Capitalized Subsequent to Acquisition, Land	72
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	297
Amount at Which Carried at Close of Period. Land	16,314
Amount at Which Carried at Close of Period, Buildings & Improvements	13,922
Total real estate investments	30,236
Accumulated Depreciation	3,141
Harbor Place Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	16,506
Initial Cost to Company, Buildings & Improvements	10,527
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	533
Amount at Which Carried at Close of Period. Land	16,506
Amount at Which Carried at Close of Period, Buildings & Improvements	11,060
Total real estate investments	27,566
Accumulated Depreciation	2,240
Diamond Bar Town Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,540
Initial Cost to Company, Buildings & Improvements	16,795
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3,775
Amount at Which Carried at Close of Period. Land	9,540
Amount at Which Carried at Close of Period, Buildings & Improvements	20,570
Total real estate investments	30,110
Accumulated Depreciation	5,585
Bernardo Heights Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,192
Initial Cost to Company, Buildings & Improvements	8,940
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	728
Amount at Which Carried at Close of Period. Land	3,192
Amount at Which Carried at Close of Period, Buildings & Improvements	9,668
Total real estate investments	12,860
Accumulated Depreciation	2,219
Canyon Crossing, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	7,941
Initial Cost to Company, Buildings & Improvements	24,659
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,959
Amount at Which Carried at Close of Period. Land	7,941
Amount at Which Carried at Close of Period, Buildings & Improvements	27,618
Total real estate investments	35,559
Accumulated Depreciation	6,814
Diamond Hills Plaza, CA
Real Estate Properties [Line Items]
Encumbrances	35,500
Initial Cost to Company, Land	15,458
Initial Cost to Company, Buildings & Improvements	29,353
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	872
Amount at Which Carried at Close of Period. Land	15,458
Amount at Which Carried at Close of Period, Buildings & Improvements	30,225
Total real estate investments	45,683
Accumulated Depreciation	5,818
Granada Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,673
Initial Cost to Company, Buildings & Improvements	13,459
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	842
Amount at Which Carried at Close of Period. Land	3,673
Amount at Which Carried at Close of Period, Buildings & Improvements	14,301
Total real estate investments	17,974
Accumulated Depreciation	3,005
Hawthorne Crossings, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,383
Initial Cost to Company, Buildings & Improvements	29,277
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	221
Amount at Which Carried at Close of Period. Land	10,383
Amount at Which Carried at Close of Period, Buildings & Improvements	29,498
Total real estate investments	39,881
Accumulated Depreciation	5,703
Robinwood Shopping Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,997
Initial Cost to Company, Buildings & Improvements	11,317
Cost Capitalized Subsequent to Acquisition, Land	18
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,141
Amount at Which Carried at Close of Period. Land	4,015
Amount at Which Carried at Close of Period, Buildings & Improvements	12,458
Total real estate investments	16,473
Accumulated Depreciation	2,721
5 Points Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	17,920
Initial Cost to Company, Buildings & Improvements	36,965
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,242
Amount at Which Carried at Close of Period. Land	17,920
Amount at Which Carried at Close of Period, Buildings & Improvements	41,207
Total real estate investments	59,127
Accumulated Depreciation	7,778
Crossroads Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	68,366
Initial Cost to Company, Buildings & Improvements	67,756
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	19,067
Amount at Which Carried at Close of Period. Land	68,366
Amount at Which Carried at Close of Period, Buildings & Improvements	86,823
Total real estate investments	155,189
Accumulated Depreciation	17,347
Peninsula Marketplace, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	14,730
Initial Cost to Company, Buildings & Improvements	19,214
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,979
Amount at Which Carried at Close of Period. Land	14,730
Amount at Which Carried at Close of Period, Buildings & Improvements	21,193
Total real estate investments	35,923
Accumulated Depreciation	4,162
Country Club Village, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,986
Initial Cost to Company, Buildings & Improvements	26,579
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,797
Amount at Which Carried at Close of Period. Land	9,986
Amount at Which Carried at Close of Period, Buildings & Improvements	28,376
Total real estate investments	38,362
Accumulated Depreciation	5,845
Plaza de la Canada, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,351
Initial Cost to Company, Buildings & Improvements	24,819
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,233
Amount at Which Carried at Close of Period. Land	10,351
Amount at Which Carried at Close of Period, Buildings & Improvements	26,052
Total real estate investments	36,403
Accumulated Depreciation	4,567
Tigard Marketplace, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	13,587
Initial Cost to Company, Buildings & Improvements	9,603
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	692
Amount at Which Carried at Close of Period. Land	13,587
Amount at Which Carried at Close of Period, Buildings & Improvements	10,295
Total real estate investments	23,882
Accumulated Depreciation	2,533
Creekside Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	14,807
Initial Cost to Company, Buildings & Improvements	29,476
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,495
Amount at Which Carried at Close of Period. Land	14,807
Amount at Which Carried at Close of Period, Buildings & Improvements	31,971
Total real estate investments	46,778
Accumulated Depreciation	5,737
North Park Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	13,593
Initial Cost to Company, Buildings & Improvements	17,733
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,737
Amount at Which Carried at Close of Period. Land	13,593
Amount at Which Carried at Close of Period, Buildings & Improvements	19,470
Total real estate investments	33,063
Accumulated Depreciation	3,042
Fallbrook Shopping Center
Real Estate Properties [Line Items]
Initial Cost to Company, Land	21,232
Initial Cost to Company, Buildings & Improvements	186,197
Cost Capitalized Subsequent to Acquisition, Land	83
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	9,379
Amount at Which Carried at Close of Period. Land	21,315
Amount at Which Carried at Close of Period, Buildings & Improvements	195,576
Total real estate investments	216,891
Accumulated Depreciation	32,933
Moorpark Town Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	7,063
Initial Cost to Company, Buildings & Improvements	19,694
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,631
Amount at Which Carried at Close of Period. Land	7,063
Amount at Which Carried at Close of Period, Buildings & Improvements	21,325
Total real estate investments	28,388
Accumulated Depreciation	4,498
Mission Foothill Marketplace Pads, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,996
Initial Cost to Company, Buildings & Improvements	11,051
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	297
Amount at Which Carried at Close of Period. Land	3,996
Amount at Which Carried at Close of Period, Buildings & Improvements	11,348
Total real estate investments	15,344
Accumulated Depreciation	1,439
Wilsonville Town Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,334
Initial Cost to Company, Buildings & Improvements	27,101
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	602
Amount at Which Carried at Close of Period. Land	10,334
Amount at Which Carried at Close of Period, Buildings & Improvements	27,703
Total real estate investments	38,037
Accumulated Depreciation	4,553
Park Oaks Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,527
Initial Cost to Company, Buildings & Improvements	38,064
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	569
Amount at Which Carried at Close of Period. Land	8,527
Amount at Which Carried at Close of Period, Buildings & Improvements	38,633
Total real estate investments	47,160
Accumulated Depreciation	5,934
Ontario Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,825
Initial Cost to Company, Buildings & Improvements	26,635
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,470
Amount at Which Carried at Close of Period. Land	9,825
Amount at Which Carried at Close of Period, Buildings & Improvements	28,105
Total real estate investments	37,930
Accumulated Depreciation	4,644
Winston Manor, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,018
Initial Cost to Company, Buildings & Improvements	9,762
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,132
Amount at Which Carried at Close of Period. Land	10,018
Amount at Which Carried at Close of Period, Buildings & Improvements	11,894
Total real estate investments	21,912
Accumulated Depreciation	2,053
Jackson Square, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,886
Initial Cost to Company, Buildings & Improvements	24,558
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,111
Amount at Which Carried at Close of Period. Land	6,886
Amount at Which Carried at Close of Period, Buildings & Improvements	25,669
Total real estate investments	32,555
Accumulated Depreciation	3,632
Tigard Promenade, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,844
Initial Cost to Company, Buildings & Improvements	10,843
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	245
Amount at Which Carried at Close of Period. Land	9,844
Amount at Which Carried at Close of Period, Buildings & Improvements	11,088
Total real estate investments	20,932
Accumulated Depreciation	1,517
Sunnyside Village Square, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	4,428
Initial Cost to Company, Buildings & Improvements	13,324
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3,856
Amount at Which Carried at Close of Period. Land	4,428
Amount at Which Carried at Close of Period, Buildings & Improvements	17,180
Total real estate investments	21,608
Accumulated Depreciation	2,875
Gateway Centre, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	16,275
Initial Cost to Company, Buildings & Improvements	28,308
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,178
Amount at Which Carried at Close of Period. Land	16,275
Amount at Which Carried at Close of Period, Buildings & Improvements	32,486
Total real estate investments	48,761
Accumulated Depreciation	4,231
Johnson Creek Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,009
Initial Cost to Company, Buildings & Improvements	22,534
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,391
Amount at Which Carried at Close of Period. Land	9,009
Amount at Which Carried at Close of Period, Buildings & Improvements	23,925
Total real estate investments	32,934
Accumulated Depreciation	3,308
Iron Horse Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	8,187
Initial Cost to Company, Buildings & Improvements	39,654
Cost Capitalized Subsequent to Acquisition, Land	11
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,519
Amount at Which Carried at Close of Period. Land	8,198
Amount at Which Carried at Close of Period, Buildings & Improvements	42,173
Total real estate investments	50,371
Accumulated Depreciation	4,732
Bellevue Marketplace, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,488
Initial Cost to Company, Buildings & Improvements	39,119
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	10,162
Amount at Which Carried at Close of Period. Land	10,488
Amount at Which Carried at Close of Period, Buildings & Improvements	49,281
Total real estate investments	59,769
Accumulated Depreciation	5,515
Four Corner Square, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,926
Initial Cost to Company, Buildings & Improvements	31,415
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	491
Amount at Which Carried at Close of Period. Land	9,926
Amount at Which Carried at Close of Period, Buildings & Improvements	31,906
Total real estate investments	41,832
Accumulated Depreciation	4,106
Warner Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	16,104
Initial Cost to Company, Buildings & Improvements	60,188
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	9,266
Amount at Which Carried at Close of Period. Land	16,104
Amount at Which Carried at Close of Period, Buildings & Improvements	69,454
Total real estate investments	85,558
Accumulated Depreciation	8,460
Magnolia Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	12,501
Initial Cost to Company, Buildings & Improvements	27,040
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,046
Amount at Which Carried at Close of Period. Land	12,501
Amount at Which Carried at Close of Period, Buildings & Improvements	29,086
Total real estate investments	41,587
Accumulated Depreciation	3,621
Casitas Plaza Shopping Center, CA
Real Estate Properties [Line Items]
Encumbrances	7,001
Initial Cost to Company, Land	10,734
Initial Cost to Company, Buildings & Improvements	22,040
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,431
Amount at Which Carried at Close of Period. Land	10,734
Amount at Which Carried at Close of Period, Buildings & Improvements	23,471
Total real estate investments	34,205
Accumulated Depreciation	2,626
Bouquet Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,040
Initial Cost to Company, Buildings & Improvements	48,362
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	606
Amount at Which Carried at Close of Period. Land	10,040
Amount at Which Carried at Close of Period, Buildings & Improvements	48,968
Total real estate investments	59,008
Accumulated Depreciation	5,373
North Ranch Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	31,522
Initial Cost to Company, Buildings & Improvements	95,916
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,826
Amount at Which Carried at Close of Period. Land	31,522
Amount at Which Carried at Close of Period, Buildings & Improvements	97,742
Total real estate investments	129,264
Accumulated Depreciation	9,622
Monterey Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	1,073
Initial Cost to Company, Buildings & Improvements	10,609
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	237
Amount at Which Carried at Close of Period. Land	1,073
Amount at Which Carried at Close of Period, Buildings & Improvements	10,846
Total real estate investments	11,919
Accumulated Depreciation	1,080
Rose City Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	3,637
Initial Cost to Company, Buildings & Improvements	10,301
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	(78)
Amount at Which Carried at Close of Period. Land	3,637
Amount at Which Carried at Close of Period, Buildings & Improvements	10,223
Total real estate investments	13,860
Accumulated Depreciation	987
The Knolls, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	9,726
Initial Cost to Company, Buildings & Improvements	18,299
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	21
Amount at Which Carried at Close of Period. Land	9,726
Amount at Which Carried at Close of Period, Buildings & Improvements	18,320
Total real estate investments	28,046
Accumulated Depreciation	1,827
Bridle Trails Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	11,534
Initial Cost to Company, Buildings & Improvements	20,700
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	7,906
Amount at Which Carried at Close of Period. Land	11,534
Amount at Which Carried at Close of Period, Buildings & Improvements	28,606
Total real estate investments	40,140
Accumulated Depreciation	2,586
Torrey Hills Corporate Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,579
Initial Cost to Company, Buildings & Improvements	3,915
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,435
Amount at Which Carried at Close of Period. Land	5,579
Amount at Which Carried at Close of Period, Buildings & Improvements	6,350
Total real estate investments	11,929
Accumulated Depreciation	1,320
PCC Community Markets Plaza, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	1,856
Initial Cost to Company, Buildings & Improvements	6,914
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	7
Amount at Which Carried at Close of Period. Land	1,856
Amount at Which Carried at Close of Period, Buildings & Improvements	6,921
Total real estate investments	8,777
Accumulated Depreciation	657
The Terraces, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	18,378
Initial Cost to Company, Buildings & Improvements	37,103
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,423
Amount at Which Carried at Close of Period. Land	18,378
Amount at Which Carried at Close of Period, Buildings & Improvements	38,526
Total real estate investments	56,904
Accumulated Depreciation	3,291
Santa Rosa Southside Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,595
Initial Cost to Company, Buildings & Improvements	24,453
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,788
Amount at Which Carried at Close of Period. Land	5,595
Amount at Which Carried at Close of Period, Buildings & Improvements	26,241
Total real estate investments	31,836
Accumulated Depreciation	2,057
Division Center, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	6,917
Initial Cost to Company, Buildings & Improvements	26,098
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,086
Amount at Which Carried at Close of Period. Land	6,917
Amount at Which Carried at Close of Period, Buildings & Improvements	28,184
Total real estate investments	35,101
Accumulated Depreciation	2,353
Highland Hill Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	10,511
Initial Cost to Company, Buildings & Improvements	37,825
Cost Capitalized Subsequent to Acquisition, Land	29
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	382
Amount at Which Carried at Close of Period. Land	10,540
Amount at Which Carried at Close of Period, Buildings & Improvements	38,207
Total real estate investments	48,747
Accumulated Depreciation	3,210
Monta Loma Plaza, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	18,226
Initial Cost to Company, Buildings & Improvements	11,113
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	140
Amount at Which Carried at Close of Period. Land	18,226
Amount at Which Carried at Close of Period, Buildings & Improvements	11,253
Total real estate investments	29,479
Accumulated Depreciation	784
Fullerton Crossroads, CA
Real Estate Properties [Line Items]
Encumbrances	26,000
Initial Cost to Company, Land	28,512
Initial Cost to Company, Buildings & Improvements	45,419
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	476
Amount at Which Carried at Close of Period. Land	28,512
Amount at Which Carried at Close of Period, Buildings & Improvements	45,895
Total real estate investments	74,407
Accumulated Depreciation	3,205
Riverstone Marketplace, CA
Real Estate Properties [Line Items]
Encumbrances	17,656
Initial Cost to Company, Land	5,113
Initial Cost to Company, Buildings & Improvements	27,594
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	277
Amount at Which Carried at Close of Period. Land	5,113
Amount at Which Carried at Close of Period, Buildings & Improvements	27,871
Total real estate investments	32,984
Accumulated Depreciation	1,876
North Lynnwood Shopping Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	4,955
Initial Cost to Company, Buildings & Improvements	10,335
Cost Capitalized Subsequent to Acquisition, Land	9
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	710
Amount at Which Carried at Close of Period. Land	4,964
Amount at Which Carried at Close of Period, Buildings & Improvements	11,045
Total real estate investments	16,009
Accumulated Depreciation	766
The Village at Nellie Gail Ranch, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	22,730
Initial Cost to Company, Buildings & Improvements	22,578
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,387
Amount at Which Carried at Close of Period. Land	22,730
Amount at Which Carried at Close of Period, Buildings & Improvements	23,965
Total real estate investments	46,695
Accumulated Depreciation	1,528
Stadium Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	1,699
Initial Cost to Company, Buildings & Improvements	17,229
Cost Capitalized Subsequent to Acquisition, Land	7
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	87
Amount at Which Carried at Close of Period. Land	1,706
Amount at Which Carried at Close of Period, Buildings & Improvements	17,316
Total real estate investments	19,022
Accumulated Depreciation	861
King City Plaza, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Land	5,161
Initial Cost to Company, Buildings & Improvements	10,072
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	43
Amount at Which Carried at Close of Period. Land	5,161
Amount at Which Carried at Close of Period, Buildings & Improvements	10,115
Total real estate investments	15,276
Accumulated Depreciation	570
Summerwalk Village, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	2,320
Initial Cost to Company, Buildings & Improvements	9,281
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4
Amount at Which Carried at Close of Period. Land	2,320
Amount at Which Carried at Close of Period, Buildings & Improvements	9,285
Total real estate investments	11,605
Accumulated Depreciation	$ 20

Schedule III - Real Estate an_4

Schedule III - Real Estate and Accumulated Depreciation (Details) - Reconciliation of Real Estate - Owned Subject to Operating Leases - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance	$ 3,160,472	$ 3,109,397	$ 2,687,018
Property improvements during the year	37,985	40,300	54,481
Properties acquired during the year	11,601	43,387	374,004
Properties sold during the year	69,056	24,427	0
Assets written off during the year	(9,161)	(8,185)	(6,106)
Balance	$ 3,131,841	$ 3,160,472	$ 3,109,397

Schedule III - Real Estate an_5

Schedule III - Real Estate and Accumulated Depreciation (Details) - Reconciliation of Accumulated Depreciation - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance	$ 329,207	$ 260,115	$ 193,021
Depreciation expenses	82,419	81,107	72,725
Properties sold during the year	10,775	3,551	0
Property assets fully depreciated and written off	(9,935)	(8,464)	(5,631)
Balance	$ 390,916	$ 329,207	$ 260,115

Schedule IV - Mortgage Loans _2

Schedule IV - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of period	$ 0	$ 0	$ 0
Mortgage loans acquired during the current period	13,250	0	0
Repayments on mortgage note receivable	(250)	0	0
Balance at end of period	$ 13,000	$ 0	$ 0