Retail Opportunity Investments (ROIC) 10-K 22 Feb 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Feb. 16, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	RETAIL OPPORTUNITY INVESTMENTS CORP
Trading Symbol	roic
Document Type	10-K
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		112,420,425
Entity Public Float			$ 2.1
Amendment Flag	false
Entity Central Index Key	1,407,623
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Retail Opportunity Investments Partnership L.P.
Document Information [Line Items]
Entity Registrant Name	Retail Opportunity Investments Partnerships L.P.
Document Type	10-K
Amendment Flag	false
Entity Central Index Key	1,577,230
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Real Estate Investments:
Land	$ 878,797	$ 766,199
Building and improvements	2,230,600	1,920,819
Total real estate investments	3,109,397	2,687,018
Less: accumulated depreciation	260,115	193,021
Real Estate Investments, net	2,849,282	2,493,997
Cash and cash equivalents	11,553	13,125
Restricted cash	5,412	125
Tenant and other receivables, net	43,257	35,820
Deposits	500	0
Acquired lease intangible assets, net	82,778	79,205
Prepaid expenses	2,853	3,317
Deferred charges, net	37,167	34,753
Other	6,396	2,627
Total assets	3,039,198	2,662,969
Liabilities:
Term loan	298,816	299,191
Credit facility	140,329	95,654
Mortgage notes payable	107,915	71,303
Acquired lease intangible liabilities, net	178,984	154,958
Accounts payable and accrued expenses	18,638	18,294
Tenants’ security deposits	6,771	5,950
Other liabilities	18,018	11,922
Total liabilities	1,709,557	1,347,404
Commitments and contingencies
Equity:
Preferred stock, $.0001 par value 50,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $.0001 par value 500,000,000 shares authorized; and 109,301,762 and 99,531,034 shares issued and outstanding at December 31, 2016 and 2015, respectively	11	11
Additional paid-in-capital	1,412,590	1,357,910
Dividends in excess of earnings	(210,490)	(165,951)
Accumulated other comprehensive loss	1,856	(3,729)
Total Retail Opportunity Investments Corp. stockholders' equity	1,203,967	1,188,241
Non-controlling interests	125,674	127,324
Total equity	1,329,641	1,315,565
Total liabilities and equity	3,039,198	2,662,969
Retail Opportunity Investments Partnership L.P.
Real Estate Investments:
Land	878,797	766,199
Building and improvements	2,230,600	1,920,819
Total real estate investments	3,109,397	2,687,018
Less: accumulated depreciation	260,115	193,021
Real Estate Investments, net	2,849,282	2,493,997
Cash and cash equivalents	11,553	13,125
Restricted cash	5,412	125
Tenant and other receivables, net	43,257	35,820
Deposits	500	0
Acquired lease intangible assets, net	82,778	79,205
Prepaid expenses	2,853	3,317
Deferred charges, net	37,167	34,753
Other	6,396	2,627
Total assets	3,039,198	2,662,969
Liabilities:
Term loan	298,816	299,191
Credit facility	140,329	95,654
Mortgage notes payable	107,915	71,303
Acquired lease intangible liabilities, net	178,984	154,958
Accounts payable and accrued expenses	18,638	18,294
Tenants’ security deposits	6,771	5,950
Other liabilities	18,018	11,922
Total liabilities	1,709,557	1,347,404
Commitments and contingencies
Equity:
ROIC capital	1,202,111	1,191,970
Limited partners’ capital	125,674	127,324
Accumulated other comprehensive loss	1,856	(3,729)
Total equity	1,329,641	1,315,565
Total liabilities and equity	3,039,198	2,662,969
Senior Notes Due 2027
Liabilities:
Senior Notes	248,751	0
Senior Notes Due 2027 | Retail Opportunity Investments Partnership L.P.
Liabilities:
Senior Notes	248,751	0
Senior Notes Due 2026
Liabilities:
Senior Notes	199,752	199,727
Senior Notes Due 2026 | Retail Opportunity Investments Partnership L.P.
Liabilities:
Senior Notes	199,752	199,727
Senior Notes Due 2024
Liabilities:
Senior Notes	245,887	245,354
Senior Notes Due 2024 | Retail Opportunity Investments Partnership L.P.
Liabilities:
Senior Notes	245,887	245,354
Senior Notes Due 2023
Liabilities:
Senior Notes	245,696	245,051
Senior Notes Due 2023 | Retail Opportunity Investments Partnership L.P.
Liabilities:
Senior Notes	$ 245,696	$ 245,051

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
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)	112,347,451	109,301,762
Common stock, shares outstanding (in shares)	112,347,451	109,301,762

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Base rents	$ 210,564	$ 183,330	$ 148,622
Recoveries from tenants	58,818	51,454	40,562
Other income	3,878	2,405	3,515
Total revenues	273,260	237,189	192,699
Operating expenses
Property operating	39,151	32,201	28,475
Property taxes	29,663	25,058	19,690
Depreciation and amortization	96,256	88,359	70,957
General and administrative expenses	14,103	13,120	12,650
Acquisition transaction costs	4	824	965
Other expense	418	456	627
Total operating expenses	179,595	160,018	133,364
Operating income	93,665	77,171	59,335
Non-operating expenses
Interest expense and other finance expenses	(50,977)	(40,741)	(34,243)
Net income	42,688	36,430	25,092
Net income attributable to non-controlling interests	(4,211)	(3,676)	(1,228)
Net Income Attributable to Retail Opportunity Investments Corp.	$ 38,477	$ 32,754	$ 23,864
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.35	$ 0.31	$ 0.25
Dividends per common share or unit (in usd per share)	$ 0.75	$ 0.72	$ 0.68
Comprehensive income:
Net income	$ 42,688	$ 36,430	$ 25,092
Unrealized swap derivative gain arising during the period	3,665	541	0
Reclassification adjustment for amortization of interest expense included in net income	1,920	2,473	2,139
Other comprehensive income	5,585	3,014	2,139
Comprehensive income	48,273	39,444	27,231
Comprehensive income attributable to non-controlling interests	(4,211)	(3,676)	(1,228)
Comprehensive income attributable to Retail Opportunity Investments Corp	44,062	35,768	26,003
Retail Opportunity Investments Partnership L.P.
Revenues
Base rents	210,564	183,330	148,622
Recoveries from tenants	58,818	51,454	40,562
Other income	3,878	2,405	3,515
Total revenues	273,260	237,189	192,699
Operating expenses
Property operating	39,151	32,201	28,475
Property taxes	29,663	25,058	19,690
Depreciation and amortization	96,256	88,359	70,957
General and administrative expenses	14,103	13,120	12,650
Acquisition transaction costs	4	824	965
Other expense	418	456	627
Total operating expenses	179,595	160,018	133,364
Operating income	93,665	77,171	59,335
Non-operating expenses
Interest expense and other finance expenses	(50,977)	(40,741)	(34,243)
Net income	$ 42,688	$ 36,430	$ 25,092
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.35	$ 0.31	$ 0.25
Dividends per common share or unit (in usd per share)	$ 0.75	$ 0.72	$ 0.68
Comprehensive income:
Net income	$ 42,688	$ 36,430	$ 25,092
Unrealized swap derivative gain arising during the period	3,665	541	0
Reclassification adjustment for amortization of interest expense included in net income	1,920	2,473	2,139
Other comprehensive income	5,585	3,014	2,139
Comprehensive income attributable to Retail Opportunity Investments Corp	$ 48,273	$ 39,444	$ 27,231

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Officer	Common Stock	Additional paid-in capital	Retained earnings (Accumulated deficit)	Retained earnings (Accumulated deficit)Officer	Accumulated other comprehensive loss	Non- controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)			92,991,333
Balance at Dec. 31, 2014	$ 962,782		$ 9	$ 1,013,561	$ (80,976)		$ (8,882)	$ 39,070
Balance (in shares) at Dec. 31, 2014			92,991,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the 2009 Plan (in shares)			381,577
Shares withheld for employee taxes (in shares)			(78,570)
Shares withheld for employee taxes	(1,317)			(1,317)
Cancellation of restricted stock (in shares)			(2,832)
Stock based compensation expense	4,684			4,684
Redemption of OP Units (in shares)			174,959
Redemption of OP Units	3,184			3,184				(3,184)
Issuance of OP Units to non-controlling interests	116,640							116,640
Adjustment to non-controlling interests ownership in Operating Partnership				49,609				(49,609)
Proceeds from the issuance of common stock	101,293		$ 1	101,292
Proceeds from the issuance of common stock (in shares)			6,064,567
Registration expenditures	(4,618)			(4,618)
Cash dividends	(68,482)	$ (161)			(65,718)	$ (161)		(2,764)
Net income attributable to Retail Opportunity Investments Corp.	23,864				23,864
Net income attributable to non-controlling interests	1,228							1,228
Other comprehensive income	2,139						2,139
Total (in shares)			92,991,333
Total	1,138,052		$ 10	1,166,395	(122,991)		(6,743)	101,381
Less: Promissory note secured by equity	(6,710)
Balance (in shares) at Dec. 31, 2015			99,531,034
Balance at Dec. 31, 2015	1,131,342		$ 10	1,166,395	(122,991)		(6,743)	94,671
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)			99,531,034
Shares issued under the 2009 Plan (in shares)			341,306
Shares withheld for employee taxes (in shares)			(76,262)
Shares withheld for employee taxes	(1,368)			(1,368)
Cancellation of restricted stock (in shares)			(7,332)
Stock based compensation expense	4,916			4,916
Redemption of OP Units (in shares)			755,762
Redemption of OP Units	15,990			15,990				(15,990)
Issuance of OP Units to non-controlling interests	48,175							48,175
Cash redemption for non-controlling interests	(7,182)							(7,182)
Adjustment to non-controlling interests ownership in Operating Partnership				(5,627)				5,627
Proceeds from the issuance of common stock	184,881		$ 1	184,880
Proceeds from the issuance of common stock (in shares)			8,757,254
Registration expenditures	(7,276)			(7,276)
Cash dividends	(83,900)	(177)			(75,537)	(177)		(8,363)
Net income attributable to Retail Opportunity Investments Corp.	32,754				32,754
Net income attributable to non-controlling interests	3,676							3,676
Other comprehensive income	$ 3,014						3,014
Total (in shares)	109,301,762		99,531,034
Total	$ 1,308,855		$ 11	1,357,910	(165,951)		(3,729)	120,614
Less: Promissory note secured by equity	$ 6,710							6,710
Balance (in shares) at Dec. 31, 2016	109,301,762		109,301,762
Balance at Dec. 31, 2016	$ 1,315,565		$ 11	1,357,910	(165,951)		(3,729)	127,324
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total (in shares)	109,301,762		109,301,762
Shares issued under the 2009 Plan (in shares)			353,261
Shares issued under the 2009 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
Redemption of OP Units (in shares)	150,503		150,503
Redemption of OP Units	$ 50,155
Equity redemption and exchange of OP Units				50,155				(50,155)
Issuance of OP Units to non-controlling interests	49,599							49,599
Equity redemption and exchange of OP Units (in shares)			2,555,933
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	4,481		$ 0	4,481
Proceeds from the issuance of common stock (in shares)			212,825
Registration expenditures	(1,045)			(1,045)				0
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	$ 5,585						5,585
Total (in shares)	109,301,762		109,301,762
Balance (in shares) at Dec. 31, 2017	112,347,451		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		112,347,451

Consolidated Statements of Equ6

Consolidated Statements of Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]
Dividends per share (in dollars per share)	$ 0.75	$ 0.72	$ 0.68

Consolidated Statement of Partn

Consolidated Statement of Partners' Capital - USD ($) $ in Thousands		Total	Officer	Accumulated other comprehensive loss	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.ROIC Capital		Retail Opportunity Investments Partnership L.P.ROIC CapitalOfficer	[2]	Retail Opportunity Investments Partnership L.P.Accumulated other comprehensive loss
Total (in shares)							3,921,314	[1]	92,991,333	[2]
Balance (in shares) at Dec. 31, 2014							3,921,314	[1]	92,991,333	[2]
Balance at Dec. 31, 2014					$ 962,782		$ 39,070	[1]	$ 932,594	[2]			$ (8,882)
OP Units issued under the 2009 Plan (in shares)	[2]								381,577
Shares withheld for employee taxes (in shares)	[2]								(78,570)
Shares withheld for employee taxes		$ (1,317)			(1,317)				$ (1,317)	[2]
Cancellation of OP Units (in shares)	[2]								(2,832)
Stock based compensation expense		4,684			4,684				$ 4,684	[2]
Issuance of OP Units in connection with acquisition (in Shares)	[1]						8,449,248
Issuance of OP Units in connection with acquisition					116,640		$ 116,640	[1]
Equity redemption of OP Units (in shares)							(174,959)	[1]	174,959	[2]
Equity redemption of OP Units		3,184			3,184		$ (3,184)	[1]	$ 3,184	[2]
Adjustment to non-controlling interests ownership in Operating Partnership							(49,609)	[1]	$ 49,609	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]								6,064,567
Issuance of OP Units in connection with common stock offering		101,293			101,293				$ 101,293	[2]
Registration expenditures		(4,618)			(4,618)				(4,618)	[2]
Cash distributions					(68,482)	$ (161)	(2,764)	[1]	(65,718)	[2]	$ (161)
Dividends		(68,482)	$ (161)
Net income		25,092			25,092		$ 1,228	[1]	$ 23,864	[2]
Other comprehensive income		2,139		$ 2,139	2,139								2,139
Total (in shares)							3,921,314	[1]	92,991,333	[2]
Total					1,138,052		$ 101,381	[1]	$ 1,043,414	[2]			(6,743)
Less: Promissory note secured by capital		(6,710)			(6,710)		$ (6,710)	[1]
Balance (in shares) at Dec. 31, 2015							12,195,603	[1]	99,531,034	[2]
Balance at Dec. 31, 2015					1,131,342		$ 94,671	[1]	$ 1,043,414	[2]			(6,743)
Total (in shares)							12,195,603	[1]	99,531,034	[2]
OP Units issued under the 2009 Plan (in shares)	[2]								341,306
Shares withheld for employee taxes (in shares)	[2]								(76,262)
Shares withheld for employee taxes		(1,368)			(1,368)				$ (1,368)	[2]
Cancellation of OP Units (in shares)	[2]								(7,332)
Stock based compensation expense		4,916			4,916				$ 4,916	[2]
Issuance of OP Units in connection with acquisition (in Shares)	[1]						2,434,833
Issuance of OP Units in connection with acquisition					48,175		$ 48,175	[1]
Equity redemption of OP Units (in shares)							(755,762)	[1]	755,762	[2]
Equity redemption of OP Units		15,990			15,990		$ (15,990)	[1]	$ 15,990	[2]
Cash redemption of OP Units (in shares)	[1]						(2,206,613)
Cash redemption of OP Units		(7,182)			(7,182)		$ (7,182)	[1]
Adjustment to non-controlling interests ownership in Operating Partnership							5,627	[1]	$ (5,627)	[2]
Issuance of OP Units in connection with common stock offering (in shares)	[2]								8,757,254
Issuance of OP Units in connection with common stock offering		184,881			184,881				$ 184,881	[2]
Registration expenditures		(7,276)			(7,276)				(7,276)	[2]
Cash distributions					(83,900)	(177)	(8,363)	[1]	(75,537)	[2]	(177)
Dividends		(83,900)	(177)
Net income		36,430			36,430		$ 3,676	[1]	$ 32,754	[2]
Other comprehensive income		3,014		3,014	3,014								3,014
Total (in shares)							12,195,603	[1]	99,531,034	[2]
Total					1,308,855		$ 120,614	[1]	$ 1,191,970	[2]			(3,729)
Less: Promissory note secured by capital		6,710			6,710		$ 6,710	[1]
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)
Total (in shares)							11,668,061	[1]	109,301,762	[2]
OP Units issued under the 2009 Plan (in shares)	[2]								353,261
OP units issued under the 2009 Plan		44			44				$ 44	[2]
Shares withheld for employee taxes (in shares)	[2]								(74,331)
Shares 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)		150,503					(2,555,933)	[1]	2,555,933	[2]
Equity redemption of OP Units		$ 50,155			50,155		$ (50,155)	[1]	$ 50,155	[2]
Cash redemption of OP Units (in shares)		(157,567)					(7,064)	[1]
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)
Dividends		(91,510)	$ (235)
Net income		42,688			42,688		$ 4,211	[1]	$ 38,477	[2]
Other comprehensive income		$ 5,585		$ 5,585	5,585								5,585
Total (in shares)		124,026,442					11,668,061	[1]	109,301,762	[2]
Balance (in shares) at Dec. 31, 2017		124,026,442							112,347,451	[2]
Balance at Dec. 31, 2017					$ 1,329,641		$ 125,674	[1]	$ 1,202,111	[2]			$ 1,856
Total (in shares)		124,026,442							112,347,451	[2]
[1]	Consists of limited partnership interests held by third parties.
[2]	Consists of general and limited partnership interests held by ROIC.

Consolidated Statement of Part8

Consolidated Statement of Partners' Capital (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash distributions per unit (usd per share)	$ 0.75	$ 0.72	$ 0.68

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Restricted Cash and Investments	$ 3,800	$ 0	$ 0
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	42,688	36,430	25,092
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	96,256	88,359	70,957
Amortization of deferred financing costs and mortgage premiums, net	2,026	2,088	662
Straight-line rent adjustment	(6,176)	(4,560)	(5,013)
Amortization of above and below market rent	(17,078)	(13,847)	(9,890)
Amortization relating to stock based compensation	6,190	4,916	4,684
Provisions for tenant credit losses	1,191	1,805	1,984
Other noncash interest expense	2,139	2,139	2,139
Change in operating assets and liabilities:
Restricted cash	(643)	66	264
Tenant and other receivables	(2,452)	(4,412)	(2,599)
Prepaid expenses	464	(1,363)	501
Accounts payable and accrued expenses	456	4,417	512
Other assets and liabilities, net	3,234	(1,356)	(2,376)
Net cash provided by operating activities	128,295	114,682	86,917
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in real estate	(263,366)	(284,867)	(313,623)
Increase in restricted cash	(844)	35	23
Improvements to properties	(54,097)	(40,758)	(27,515)
Deposits on real estate acquisitions, net	(500)	500	4,000
Net cash used in investing activities	(322,607)	(325,090)	(337,115)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal repayments on mortgages	(8,848)	(7,816)	(84,308)
Proceeds from new mortgage loan	0	0	35,500
Proceeds from term loan	0	0	300,000
Proceeds from draws on credit facility	327,500	332,500	430,000
Payments on credit facility	(282,000)	(370,000)	(451,000)
Issuance of promissory note receivable	0	0	(6,710)
Proceeds on repayment of promissory note receivable	0	6,710	0
Redemption of OP Units	(150)	(38,820)	0
Distributions to OP Unitholders	(8,729)	(8,363)	(2,764)
Deferred financing and other costs	(3,845)	(266)	(1,849)
Proceeds from the issuance of OP Units in connection with issuance of common stock	4,481	184,881	101,293
Registration expenditures	(1,225)	(7,097)	(4,739)
Dividends paid to common shareholders	(82,917)	(75,672)	(65,837)
Shares withheld for employee taxes	(1,571)	(1,368)	(1,317)
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	44	0	0
Net cash provided by financing activities	192,740	214,689	248,269
Net (decrease) increase in cash and cash equivalents	(1,572)	4,281	(1,929)
Cash and cash equivalents at beginning of period	13,125	8,844	10,773
Cash and cash equivalents at end of period	11,553	13,125	8,844
Supplemental disclosure of cash activities:
Cash paid on gross receipts and income for federal and state purposes	253	206	241
Interest paid	46,271	34,275	31,996
Other non-cash investing and financing activities:
Issuance of OP Units in connection with acquisitions	49,599	46,140	150,315
Fair value of assumed mortgages upon acquisition	46,034	17,618	19,024
Intangible lease liabilities	45,456	32,615	37,480
Interest rate swap asset	3,446	875	0
Accrued real estate improvement costs	383	601	590
Equity redemption of OP Units	50,155	15,990	3,184
Retail Opportunity Investments Partnership L.P.
Increase (Decrease) in Restricted Cash and Investments	3,800	0	0
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	42,688	36,430	25,092
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	96,256	88,359	70,957
Amortization of deferred financing costs and mortgage premiums, net	2,026	2,088	662
Straight-line rent adjustment	(6,176)	(4,560)	(5,013)
Amortization of above and below market rent	(17,078)	(13,847)	(9,890)
Amortization relating to stock based compensation	6,190	4,916	4,684
Provisions for tenant credit losses	1,191	1,805	1,984
Other noncash interest expense	2,139	2,139	2,139
Change in operating assets and liabilities:
Restricted cash	(643)	66	264
Tenant and other receivables	(2,452)	(4,412)	(2,599)
Prepaid expenses	464	(1,363)	501
Accounts payable and accrued expenses	456	4,417	512
Other assets and liabilities, net	3,234	(1,356)	(2,376)
Net cash provided by operating activities	128,295	114,682	86,917
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in real estate	(263,366)	(284,867)	(313,623)
Increase in restricted cash	(844)	35	23
Improvements to properties	(54,097)	(40,758)	(27,515)
Deposits on real estate acquisitions, net	(500)	500	4,000
Net cash used in investing activities	(322,607)	(325,090)	(337,115)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal repayments on mortgages	(8,848)	(7,816)	(84,308)
Proceeds from new mortgage loan	0	0	35,500
Proceeds from term loan	0	0	300,000
Proceeds from draws on credit facility	327,500	332,500	430,000
Payments on credit facility	(282,000)	(370,000)	(451,000)
Issuance of promissory note receivable	0	0	(6,710)
Proceeds on repayment of promissory note receivable	0	6,710	0
Redemption of OP Units	(150)	(38,820)	0
Distributions to OP Unitholders	(91,646)	(84,035)	(68,601)
Deferred financing and other costs	(3,845)	(266)	(1,849)
Proceeds from the issuance of OP Units in connection with issuance of common stock	4,481	184,881	101,293
Registration expenditures	(1,225)	(7,097)	(4,739)
Shares withheld for employee taxes	(1,571)	(1,368)	(1,317)
Net cash provided by financing activities	192,740	214,689	248,269
Net (decrease) increase in cash and cash equivalents	(1,572)	4,281	(1,929)
Cash and cash equivalents at beginning of period	13,125	8,844	10,773
Cash and cash equivalents at end of period	11,553	13,125	8,844
Supplemental disclosure of cash activities:
Cash paid on gross receipts and income for federal and state purposes	253	206	241
Interest paid	46,271	34,275	31,996
Other non-cash investing and financing activities:
Issuance of OP Units in connection with acquisitions	49,599	46,140	150,315
Fair value of assumed mortgages upon acquisition	46,034	17,618	19,024
Intangible lease liabilities	45,456	32,615	37,480
Interest rate swap asset	3,446	875	0
Accrued real estate improvement costs	383	601	590
Equity redemption of OP Units	50,155	15,990	3,184
Senior Notes Due 2027
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of senior notes	250,000	0	0
Senior Notes Due 2026
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0	200,000	0
Senior Notes | Senior Notes Due 2027 | Retail Opportunity Investments Partnership L.P.
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of senior notes	250,000	0	0
Senior Notes | Senior Notes Due 2026 | Retail Opportunity Investments Partnership L.P.
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of senior notes	$ 0	$ 200,000	$ 0

Organization, Basis of Presenta

Organization, Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
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. With the approval of its stockholders, ROIC reincorporated as a Maryland corporation on June 2, 2011. ROIC began operations as a Delaware corporation, known as NRDC Acquisition Corp., which was incorporated on July 10, 2007, for the purpose of acquiring assets or operating businesses through a merger, capital stock exchange, stock purchase, asset acquisition or other similar business combination with one or more assets or control of one or more operating businesses. On October 20, 2009, ROIC’s stockholders and warrantholders approved each of the proposals presented at the special meetings of stockholders and warrantholders, respectively, in connection with the transactions contemplated by the Framework Agreement (the “Framework Agreement”) ROIC entered into on August 7, 2009 with NRDC Capital Management, LLC, which, among other things, set forth the steps to be taken by ROIC to continue its business as a corporation that has elected to qualify as a REIT for U.S. federal income tax purposes. 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 August 2017, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The pronouncement was issued to simplify the on-going assessment of hedge effectiveness and increase transparency related to hedge accounting. 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. 2017-12 effective July 1, 2017 using the modified retrospective approach. The Company determined there is no impact to the Company’s historical results as a result of adoption of the new standard and therefore no adjustment to retained earnings from application of the ASU. In January 2017, the FASB issued ASU No. 2017-1, “Business Combinations: Clarifying the Definition of a Business.” The pronouncement changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. The pronouncement requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities is not a business. 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 2017-1 effective October 1, 2016. For the period from October 1, 2016 through December 31, 2017, for the Company’s acquisitions it was concluded substantially all of the fair value of the assets acquired with each property acquisition was concentrated in a single identifiable asset and did not meet the definition of a business under ASU No. 2017-1. Acquisition transaction costs associated with these property acquisitions were capitalized to real estate investments. In February 2016, the FASB issued ASU No. 2016-2, “Leases.” ASU No. 2016-2 is expected to result 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. As of December 31, 2017 , the remaining contractual payments under ground lease agreements aggregated approximately $41.8 million . In addition, this ASU will require 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 will no longer be capitalized as initial direct costs and instead will be expensed as incurred. As a lessor, under current accounting standards, the Company recognizes rental revenue from its operating leases on a straight-line basis over the respective lease terms. The Company commences recognition of rental revenue at the date the property is ready for its intended use and the tenant takes possession of or controls the physical use of the property. Under current accounting standards, tenant recoveries related to payments of real estate taxes, insurance, utilities, repairs and maintenance, common area expenses, and other operating expenses are considered lease components. The Company recognizes these tenant recoveries as revenue when services are rendered in an amount equal to the related operating expenses incurred that are recoverable under the terms of the applicable lease. Under ASU 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 January 2018, the FASB issued a proposed amendment to ASU No. 2016-2 that would allow 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. If adopted, this practical expedient will allow 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 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 plans to adopt the provisions of ASU No. 2016-2 effective January 1, 2019 using the modified retrospective approach. The Company continues to evaluate the impact this pronouncement will have on the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-9, “Revenue from Contracts with Customers.” The pronouncement was issued to clarify the principles for recognizing revenue and to develop a common revenue standard and disclosure requirements for U.S. GAAP and International Financial Reporting Standards. The pronouncement is effective for reporting periods beginning after December 15, 2017. The Company will adopt the provisions of ASU No. 2014-9 effective January 1, 2018 using the modified retrospective approach. As discussed above, leases are specifically excluded from ASU No. 2014-9 and will be governed by the applicable lease codification; however, this update may have implications on certain variable payment terms included in lease agreements. Upon adoption of ASU No. 2016-2 in 2019, the Company may be required to classify its tenant recoveries into lease and nonlease components, whereby the nonlease components would be subject to the revenue recognition ASU, pending the resolution of the proposed amendment issued by the FASB in January 2018. Property services categorized as nonlease components that are reimbursed by the Company’s tenants may need to be presented on a net basis if it is determined that the Company holds an agent arrangement. The Company evaluated the revenue recognition for all contracts within this scope under existing accounting standards and under ASU No. 2014-9 and confirmed that there were no differences in the amounts recognized or the pattern of recognition. Therefore, the adoption of this ASU did not result in an adjustment to the Company’s retained earnings on January 1, 2018. 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. Effective January 1, 2016, the Company adopted the provisions of ASU No 2015-2, and as a result, concluded that the Operating Partnership is a VIE. The Company has concluded that 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 modifies 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 purchase price allocations, depreciable lives, revenue recognition and the collectability of tenant receivables, other receivables, notes receivables, the valuation of performance-based restricted stock, 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. In addition, taxable income from non-REIT activities managed through the Company’s taxable REIT subsidiary (“TRS”), if any, is fully subject to U.S. federal, state and local income taxes. 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, 2017 , the statute of limitations for tax years 2014 through and including 2016 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. On December 22, 2017, the Tax Cuts and Jobs Act (H.R. 1, the “TCJA”) was signed into law, which makes significant changes to U.S. federal income tax laws applicable to businesses and their owners, including REITs and their stockholders. The Company continues to evaluate the impact the TCJA will have on its consolidated financial statements. 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, 2017 and 2016 , capitalized costs related to the improvements or replacement of real estate properties were approximately $54.5 million and $41.4 million , respectively. 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 expensed acquisition transaction costs during the years ended December 31, 2017 , 2016 and 2015 of approximately $4,000 , $824,000 and $965,000 , 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 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 (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 (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 rental income, over the terms of the respective leases including option periods, if applicable. The value of in-place leases are 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. 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, 2017 . 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 Restricted cash primarily represents cash that is being held by a qualified intermediary in anticipation of the acquisition of a replacement property in a tax-free exchange under Section 1031 of the Code. Additionally, the terms of several of the Company’s mortgage loans payable 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. Property operating expense recoveries from tenants of common area maintenance, real estate taxes and other recoverable costs are recognized in the period the related expenses are incurred. Lease incentives are amortized as a reduction of rental revenue over the respective tenant lease terms. Termination fees (included in other 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 in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, “Revenue Recognition,” 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 under GAAP 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, 2017 and December 31, 2016 was approximately $6.4 million and $5.2 million , respectively. Depreciation and Amortization The Company uses the straight-line method for depreciation and amortization. Buildings are depreciated over the estimated useful lives which the Company estimates to be 39 - 40 years. Property improvements are depreciated over the 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. The unamortized balances of deferred leasing costs included in deferred charges in the Consolidated Balance Sheet as of December 31, 2017 that will be charged to future operations are as follows (in thousands): Lease Origination Costs 2018 $ 7,937 2019 6,537 2020 5,267 2021 4,353 2022 3,425 Thereafter 9,648 $ 37,167 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 Sheet as of December 31, 2017 that will be charged to future operations are as follows (in thousands): Financing Costs 2018 $ 1,805 2019 1,793 2020 1,793 2021 1,525 2022 849 Thereafter 1,515 $ 9,280 Internal Capitalized Leasing Costs The Company capitalizes a portion of payroll-related costs related to its leasing personnel associated with new leases and lease renewals. These costs are amortized over the life of the respective leases. During the years ended December 31, 2017 , 2016 and 2015 , the Company capitalized approximately $1.2 million , $1.2 million and $1.1 million , respectively, of such payroll-related costs. 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, 2017 , 2016 and 2015 , 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 grants awarded under the 2009 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, 2017 2016 2015 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less income attributable to non-controlling interests (4,211 ) (3,676 ) (1,228 ) Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available for common stockholders, basic $ 38,158 $ 32,484 $ 23,635 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available for common stockholders, diluted $ 42,369 $ 36,160 $ 24,863 Denominator: Denominator for basic EPS – weighted average common equivalent shares 109,400,123 104,072,222 95,651,780 OP units 12,060,835 11,747,509 4,086,724 Restricted stock awards – performance-based 153,807 86,996 174,198 Stock options 129,066 133,213 105,079 Denominator for diluted EPS – weighted average common equivalent shares 121,743,831 116,039,940 100,017,781 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, 2017 2016 2015 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available to unitholders, basic and diluted $ 42,369 $ 36,160 $ 24,863 Denominator: Denominator for basic earnings per unit – weighted average common equivalent units 121,460,958 115,819,731 99,738,504 Restricted stock awards – performance-based 153,807 86,996 174,198 Stock options 129,066 133,213 105,079 Denominator for diluted earnings per unit – weighted average common equivalent units 121,743,831 116,039,940 100,017,781 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 plans based on the FASB guidance which requires that compensation expense be recognized based on the fair value of the stock awards less estimated forfeitures. Restricted stock grants vest based upon the completion of a service period (“time based grants”) and/or the Company meeting certain established market specific financial performance criteria (“performance based 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 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 ma

Real Estate Investments

Real Estate Investments	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Real Estate Investments	Real Estate Investments The following real estate investment transactions occurred during the years ended December 31, 2017 and 2016 . Property Acquisitions in 2017 Asset Acquisitions Subsequent to the adoption of ASU 2017-1, the Company evaluated its real estate property acquisitions under the new framework for determining whether a real estate property acquisition meets the definition of a business. The Company evaluated each of the following acquisitions and determined that substantially all of the fair value related to each acquisition was concentrated in a single identifiable asset. In each of these acquisitions, 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. On January 25, 2017, the Company acquired the property known as PCC Community Markets Plaza located in Edmonds, Washington, within the Seattle metropolitan area, for an adjusted purchase price of approximately $8.7 million . PCC Community Markets Plaza is approximately 34,000 square feet and is anchored by PCC Community Markets. The property was acquired with available cash from operations. On March 17, 2017, the Company acquired the property known as The Terraces located in Rancho Palos Verdes, California, within the Los Angeles metropolitan area, for an adjusted purchase price of approximately $54.2 million . The Terraces is approximately 173,000 square feet and is anchored by Trader Joe’s, Marshall’s and LA Fitness. The property was acquired with borrowings under the Company’s unsecured revolving credit facility (the “credit facility”). On March 24, 2017, the Company acquired the property known as Santa Rosa Southside Shopping Center located in Santa Rosa, California, within the San Francisco metropolitan area, for an adjusted purchase price of approximately $28.9 million . Santa Rosa Southside Shopping Center is approximately 86,000 square feet and is anchored by REI and Cost Plus World Market. The property was acquired with borrowings under the credit facility and the issuance of 168,497 OP Units with a fair value of approximately $3.6 million . On April 5, 2017, the Company acquired the property known as Division Center, located in Portland, Oregon, for an adjusted purchase price of approximately $33.1 million . Division Center is approximately 122,000 square feet and is anchored by Grocery Outlet Supermarket, Rite Aid Pharmacy and Petco. The property was acquired with borrowings under the credit facility. On May 9, 2017, the Company acquired the property known as Highland Hill, located in Tacoma, Washington, within the Seattle metropolitan area, for an adjusted purchase price of approximately $47.4 million . Highland Hill is approximately 164,000 square feet and is anchored by Safeway Supermarket, LA Fitness, Dollar Tree and Petco. The property was acquired with borrowings under the credit facility. On September 19, 2017, the Company acquired the property known as Monta Loma Plaza, located in Mountain View, California, within the San Francisco metropolitan area, for an adjusted purchase price of approximately $30.0 million . Monta Loma Plaza is approximately 48,000 square feet and is anchored by Safeway Supermarket. The property was acquired with borrowings under the credit facility. On October 11, 2017, the Company acquired the properties known as Fullerton Crossroads and Riverstone Marketplace. Fullerton Crossroads, located in Fullerton, California, within Orange County, was acquired for an adjusted purchase price of approximately $61.6 million , is approximately 220,000 square feet and is anchored by Kroger (Ralph’s) Supermarket. Riverstone Marketplace, located in Vancouver, Washington, within the Portland metropolitan area, was acquired for an adjusted purchase price of approximately $31.7 million , is approximately 96,000 square feet and is anchored by Kroger (QFC) Supermarket. The properties were acquired through the issuance of 2,405,430 OP Units with a fair value of approximately $46.0 million and the assumption of existing debt on the properties with a fair value of approximately $46.0 million . On October 19, 2017, the Company acquired the property known as North Lynnwood Shopping Center, located in Lynnwood, Washington, within the Seattle metropolitan area, for an adjusted purchase price of approximately $13.3 million . North Lynnwood Shopping Center is approximately 64,000 square feet and is anchored by Kroger (QFC) Supermarket. The property was acquired with borrowings under the credit facility. On November 30, 2017, the Company acquired the property known as The Village at Nellie Gail Ranch, located in Laguna Hills, California, within Orange County, for an adjusted purchase price of approximately $46.1 million . The Village at Nellie Gail Ranch is approximately 88,000 square feet and is anchored by Smart & Final Extra Supermarket. The property was acquired with borrowings under the credit facility. Property Acquisitions in 2016 Business Combinations Prior to the adoption of ASU 2017-1 on October 1, 2016, the Company accounted for its real estate property acquisitions as business combinations. During the year ended December 31, 2016 , the Company acquired 6 properties throughout the west coast with a total of approximately 596,000 square feet for a net adjusted purchase price of approximately $270.9 million . In each of these acquisitions, the Company allocated the total consideration for each acquisition to the individual assets and liabilities acquired based on their fair values. These acquisitions were consummated prior to October 1, 2016, and accordingly, all transaction costs incurred in these acquisitions were expensed. Asset Acquisitions During the year ended December 31, 2016 , the Company acquired assets throughout the west coast with a total of approximately 239,000 square feet for a net adjusted purchase price of approximately $76.9 million . The Company evaluated each of the following acquisitions and determined that substantially all of the fair value related to each acquisition was concentrated in a single identifiable asset. In each of these acquisitions, the Company allocated the total consideration for each acquisition to the individual assets and liabilities acquired on a relative fair value basis. These acquisitions were consummated subsequent to October 1, 2016, and accordingly, all transaction costs incurred in these acquisitions were capitalized. Any reference to square footage or occupancy is unaudited and outside the scope of our independent registered public accounting firm’s audit of the Company’s financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board. The financial information set forth below summarizes the Company’s purchase price allocation for the properties acquired during the years ended December 31, 2017 and 2016 (in thousands). December 31, 2017 December 31, 2016 Assets Land $ 109,356 $ 96,113 Building and improvements 265,040 258,584 Acquired lease intangible asset 22,024 19,667 Deferred charges 8,034 6,876 Assets acquired $ 404,454 $ 381,240 Liabilities Mortgage notes assumed $ 46,034 $ 17,618 Acquired lease intangible liability 45,456 32,615 Liabilities assumed $ 91,490 $ 50,233 Pro Forma Financial Information The pro forma financial information is based upon the Company’s historical consolidated statements of operations for the year ended December 31, 2016 , adjusted to give effect to the above completed business combination transactions as if they occurred on January 1, 2015. The pro forma financial information set forth below is presented for informational purposes only and may not be indicative of what actual results of operations would have been had the transactions occurred as if they occurred on January 1 2015, nor does it purport to represent the results of future operations. The below pro forma financial information does not include asset acquisitions that occurred during the year ended December 31, 2017 or the three months ended December 31, 2016 (in thousands). Year Ended December 31, 2016 Statement of operations: Revenues $ 245,116 Net income attributable to Retail Opportunity Investments Corp. $ 33,169 The following table summarizes the operating results included in the Company’s historical consolidated statement of operations for the year ended December 31, 2017 for the properties acquired during the year ended December 31, 2017 (in thousands). Year Ended December 31, 2017 Statement of operations: Revenues $ 13,500 Net income attributable to Retail Opportunity Investments Corp. $ 2,948 The following table summarizes the operating results included in the Company’s historical consolidated statement of operations for the year ended December 31, 2016 for the properties acquired during the year ended December 31, 2016 (in thousands). Year Ended December 31, 2016 Statement of operations: Revenues $ 15,230 Net income attributable to Retail Opportunity Investments Corp. $ 2,513

Acquired Lease Intangibles

Acquired Lease Intangibles	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Lease Intangibles	Acquired Lease Intangibles Intangible assets and liabilities as of December 31, 2017 and 2016 consisted of the following (in thousands): December 31, 2017 December 31, 2016 Assets: In-place leases $ 99,924 $ 93,952 Accumulated amortization (36,971 ) (33,034 ) Above-market leases 33,176 30,251 Accumulated amortization (13,351 ) (11,964 ) Acquired lease intangible assets, net $ 82,778 $ 79,205 Liabilities: Below-market leases $ 222,929 $ 190,321 Accumulated amortization (43,945 ) (35,363 ) Acquired lease intangible liabilities, net $ 178,984 $ 154,958 For the years ended December 31, 2017 , 2016 and 2015 , the net amortization of acquired lease intangible assets and acquired lease intangible liabilities for above and below market leases was $17.1 million , $13.8 million and $9.9 million , respectively, which amounts are included in base rents in the accompanying consolidated statements of operations and comprehensive income. For the years ended December 31, 2017 , 2016 and 2015 , the net amortization of in-place leases was $14.4 million , $15.6 million and $13.2 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, 2017 is as follows (in thousands): Year Ending December 31: 2018 $ 14,085 2019 10,270 2020 8,312 2021 6,554 2022 5,523 Thereafter 38,034 Total future amortization of acquired lease intangible assets $ 82,778 The scheduled future amortization of acquired lease intangible liabilities as of December 31, 2017 is as follows (in thousands): Year Ending December 31: 2018 $ 15,297 2019 14,334 2020 13,275 2021 12,064 2022 11,045 Thereafter 112,969 Total future amortization of acquired lease intangible liabilities $ 178,984

Tenant Leases

Tenant Leases	12 Months Ended
	Dec. 31, 2017
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, 2017 are summarized as follows (in thousands): Year Ending December 31: 2018 $ 193,314 2019 175,008 2020 153,451 2021 131,249 2022 105,293 Thereafter 448,171 Total minimum lease payments $ 1,206,486

Mortgage Notes Payable, Credit

Mortgage Notes Payable, Credit Facilities and Senior Notes	12 Months Ended
	Dec. 31, 2017
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, the Senior Notes Due 2027, the Senior Notes Due 2026, the Senior Notes Due 2024 and the Senior Notes Due 2023. Mortgage Notes Payable On October 11, 2017, in connection with the acquisitions of Fullerton Crossroads and Riverstone Marketplace, the Company assumed two existing mortgage loans with outstanding principal balances of approximately $26.0 million and $18.5 million , respectively. On May 11, 2017, the Company repaid in full the Bernardo Heights mortgage note related to Bernardo Heights Plaza for a total of approximately $8.1 million , without penalty, in accordance with the prepayment provisions of the note. The mortgage notes payable collateralized by respective properties and assignment of leases at December 31, 2017 and December 31, 2016 , respectively, were as follows (in thousands, except interest rates): Property Maturity Date Interest Rate December 31, 2017 December 31, 2016 Bernardo Heights Plaza July 2017 5.700 % $ — $ 8,216 Santa Teresa Village February 2018 6.200 % 10,138 10,383 Magnolia Shopping Center October 2018 5.500 % 8,951 9,135 Casitas Plaza Shopping Center June 2022 5.320 % 7,307 7,449 Riverstone Marketplace July 2022 4.960 % 18,424 — Fullerton Crossroads April 2024 4.728 % 26,000 — Diamond Hills Plaza October 2025 3.550 % 35,500 35,500 $ 106,320 $ 70,683 Mortgage premiums 1,921 1,037 Net unamortized deferred financing costs (326 ) (417 ) Total mortgage notes payable $ 107,915 $ 71,303 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 2018 $ 18,900 $ 712 $ 493 $ 20,105 2019 — 550 360 910 2020 — 577 360 937 2021 — 717 360 1,077 2022 23,130 1,003 223 24,356 Thereafter 58,787 1,944 125 60,856 Total $ 100,817 $ 5,503 $ 1,921 $ 108,241 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, 2017 December 31, 2016 Term loan $ 300,000 $ 300,000 Net unamortized deferred financing costs (1,184 ) (809 ) Term loan $ 298,816 $ 299,191 On September 29, 2015, the Company entered into an unsecured term loan agreement under which the lenders agreed to provide a $300.0 million unsecured term loan facility. Effective September 8, 2017, the Company entered into a First Amended and Restated Term Loan Agreement (the “Term Loan Agreement”) pursuant to which the maturity date of the term loan was extended from January 31, 2019 to September 8, 2022 , 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 1.10% . The carrying values of the Company’s unsecured revolving credit facility were as follows (in thousands): December 31, 2017 December 31, 2016 Credit facility $ 143,500 $ 98,000 Net unamortized deferred financing costs (3,171 ) (2,346 ) Credit facility $ 140,329 $ 95,654 The Operating Partnership has an unsecured revolving credit facility with several banks. Effective September 8, 2017, the Company entered into a Second Amended and Restated Credit Agreement (the “Credit Facility Agreement”) pursuant to which the borrowing capacity was increased from $500.0 million to $600.0 million . The maturity date of the credit facility was extended from January 31, 2019 to September 8, 2021 , with two six-month extension options, which may be exercised by the Operating Partnership upon satisfaction of certain conditions including the payment of extension fees. Additionally, the credit facility contains an accordion feature, which allows the Operating Partnership to increase the borrowing capacity up to an aggregate of $1.2 billion , subject to lender consents and other conditions. Borrowings under the credit facility 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) 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 KeyBank, National Association as its “prime rate,” and (c) the Eurodollar Rate plus 1.00% . Additionally, the Operating Partnership is obligated to pay a facility fee at a rate based on the credit rating level of the Company, currently 0.20% , and a fronting fee at a rate of 0.125% per year with respect to each letter of credit issued under the credit facility. The Company has investment grade credit ratings from Moody’s Investors Service (Baa2) and Standard & Poor’s Ratings Services (BBB-). 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, 2017 . As of December 31, 2017 , $300.0 million and $143.5 million were outstanding under the term loan and credit facility, respectively. The average interest rates on the term loan and the credit facility during the year ended December 31, 2017 were 2.2% and 2.1% , respectively. The Company had no available borrowings under the term loan at December 31, 2017 . The Company had $456.5 million available to borrow under the credit facility at December 31, 2017 . Senior Notes Due 2027 The carrying value of the Company’s unsecured Senior Notes Due 2027 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ — Net unamortized deferred financing costs (1,249 ) — Senior Notes Due 2027 $ 248,751 $ — 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. The interest expense recognized on the Senior Notes Due 2027 during the year ended December 31, 2017 included approximately $466,000 for the contractual coupon interest. In connection with the issuance of the Senior Notes Due 2027, the Company incurred approximately $1.3 million of deferred financing costs which are being amortized over the term of the Senior Notes Due 2027. Senior Notes Due 2026 The carrying value of the Company’s unsecured Senior Notes Due 2026 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 200,000 $ 200,000 Net unamortized deferred financing costs (248 ) (273 ) Senior Notes Due 2026 $ 199,752 $ 199,727 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. The interest expense recognized on the Senior Notes Due 2026 during the year ended December 31, 2017 included approximately $7.9 million for the contractual coupon interest. The interest expense recognized on the Senior Notes Due 2026 during the year ended December 31, 2016 included approximately $2.2 million for the contractual coupon interest. In connection with the issuance of the Senior Notes Due 2026, the Company incurred approximately $283,000 of deferred financing costs which are being amortized over the term of the Senior Notes Due 2026. Senior Notes Due 2024 The carrying value of the Company’s unsecured Senior Notes Due 2024 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (2,578 ) (2,891 ) Net unamortized deferred financing costs (1,535 ) (1,755 ) Senior Notes Due 2024 $ 245,887 $ 245,354 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). The interest expense recognized on the Senior Notes Due 2024 during the year ended December 31, 2017 includes $10.0 million and approximately $313,000 for the contractual coupon interest and the accretion of the debt discount, respectively. The interest expense recognized on the Senior Notes Due 2024 during the year ended December 31, 2016 includes $10.0 million and approximately $300,000 for the contractual coupon interest and the accretion of the debt discount, respectively. In connection with the Senior Notes Due 2024 offering, the Company incurred approximately $2.2 million of deferred financing costs which are being amortized over the term of the Senior Notes Due 2024. Senior Notes Due 2023 The carrying value of the Company’s unsecured Senior Notes Due 2023 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (2,737 ) (3,119 ) Net unamortized deferred financing costs (1,567 ) (1,830 ) Senior Notes Due 2023 $ 245,696 $ 245,051 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 interest expense recognized on the Senior Notes Due 2023 during the year ended December 31, 2017 includes approximately $12.5 million and approximately $382,000 for the contractual coupon interest and the accretion of the debt discount, respectively. The interest expense recognized on the Senior Notes Due 2023 during the year ended December 31, 2016 includes approximately $12.5 million and approximately $363,000 for the contractual coupon interest and the accretion of the debt discount, respectively. In connection with the Senior Notes Due 2023 offering, the Company incurred approximately $2.6 million of deferred financing costs which are being amortized over the term of the Senior Notes Due 2023.

Preferred Stock of ROIC

Preferred Stock of ROIC	12 Months Ended
	Dec. 31, 2017
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, 2017 and 2016 , there were no shares of preferred stock outstanding.

Common Stock of ROIC

Common Stock of ROIC	12 Months Ended
	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Common Stock of ROIC	Common Stock of ROIC Equity Issuance In connection with the acquisitions of Fullerton Crossroads and Riverstone Marketplace, a portion of the consideration for the properties was funded through the issuance of 2,405,430 OP Units. On December 12, 2017, the Company issued 2,584,254 shares of common stock, at a price per share of $21.25 , in exchange for the 2,405,430 OP Units previously issued and the rights to approximately $3.8 million of cash to be used to acquire a third property to be identified by the Company. The proceeds of approximately $3.8 million are classified in Restricted Cash in the consolidated balance sheet as of December 31, 2017 , as the proceeds are being held with an exchange accommodator under Section 1031 of the Code, and are expected to be used to purchase a replacement asset during the first half of 2018. The shares of common stock of the Company were issued in a private placement in reliance on Section 4(a)(2) of the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. On July 12, 2016, ROIC issued 6,555,000 shares of common stock in a registered public offering, including shares issued upon the exercise in full of the underwriters’ option to purchase additional shares, resulting in net proceeds of approximately $133.0 million , after deducting the underwriters’ discounts and commissions and offering expenses. The net proceeds were used to reduce borrowings under the Operating Partnership’s revolving credit facility. ATM On September 19, 2014, ROIC entered into three separate Sales Agreements (the “Original Sales Agreements”) with each of Jefferies LLC, KeyBanc Capital Markets Inc. and Raymond James & Associates, Inc. (each individually, an “Original Agent” and collectively, the “Original 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 $100.0 million through the Original Agents either as agents or principals. On May 23, 2016, ROIC entered into two additional sales agreements (the “Additional Sales Agreements”, and together with the Original Sales Agreements, the “Sales Agreements”) with each of Canaccord Genuity Inc. and Robert W. Baird & Co. Incorporated (the “Additional Agents”, and together with the Original Agents, the “Agents”) pursuant to which the Company may sell shares of ROIC’s common stock through the Additional Agents either as agents or principals. During the year ended December 31, 2017 , ROIC sold a total of 34,001 shares of common stock under the Sales Agreements, which resulted in gross proceeds of approximately $681,000 and commissions of approximately $9,000 paid to the Agents. During the year ended December 31, 2016 , ROIC sold a total of 2,202,254 shares under the Sales Agreements, which resulted in gross proceeds of approximately $45.6 million and commissions of approximately $584,000 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, 2017 , 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, 2017
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 The Company 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. During 2009, the Company adopted the 2009 Plan. The 2009 Plan provides for grants of restricted common stock and stock option awards up to an aggregate of 7.5% of the issued and outstanding shares of the Company’s common stock at the time of the award, subject to a ceiling of 4,000,000 shares. Restricted Stock During the year ended December 31, 2017 , ROIC awarded 419,394 shares of restricted common stock under the 2009 Plan, of which 149,475 shares are performance-based grants and the remainder of the shares are time based grants. The performance-based grants vest based on pre-defined market-specific performance criteria with a vesting date on January 1, 2020. A summary of the status of the Company’s non-vested restricted stock awards as of December 31, 2017 , and changes during the year ended December 31, 2017 are presented below: Shares Weighted Average Non-vested at December 31, 2016 660,458 $ 16.10 Granted 419,394 $ 19.58 Vested (296,386 ) $ 15.61 Forfeited (1,999 ) $ 19.66 Non-vested at December 31, 2017 781,467 $ 18.14 As of December 31, 2017 , there remained a total of approximately $7.0 million of unrecognized restricted stock compensation related to outstanding non-vested restricted stock grants awarded under the 2009 Plan. Restricted stock compensation is expected to be expensed over a remaining weighted average period of 1.7 years (irrespective of achievement of the performance conditions). The total fair value of restricted stock that vested during the years ended December 31, 2017 , 2016 and 2015 was $6.3 million , $5.6 million and $4.6 million , respectively. Stock Based Compensation Expense For the years ended December 31, 2017 , 2016 and 2015 , the amounts charged to expense for all stock based compensation totaled approximately $6.2 million , $4.9 million and $4.7 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 $70,000 , $76,000 and $31,000 for the years ended December 31, 2017 , 2016 and 2015 , respectively.

Capital of the Operating Partne

Capital of the Operating Partnership	12 Months Ended
	Dec. 31, 2017
Partners' Capital Notes [Abstract]
Capital of the Operating Partnership	Capital of the Operating Partnership As of December 31, 2017 , the Operating Partnership had 124,026,442 OP Units outstanding. ROIC owned an approximate 90.5% interest in the Operating Partnership at December 31, 2017 , or 112,347,451 OP Units. The remaining 11,678,991 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, 2017 , 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. In connection with the acquisitions of Fullerton Crossroads and Riverstone Marketplace, a portion of the consideration for the properties was funded through the issuance of 2,405,430 OP Units. On December 12, 2017, the Company issued 2,584,254 shares of common stock in exchange for the 2,405,430 OP Units previously issued and the rights to approximately $3.8 million of cash to be used to acquire a third property to be identified by the Company. During the year ended December 31, 2017 , ROIC received notices of redemption for a total of 157,567 OP Units (excluding the OP Units exchanged, as described above). ROIC elected to redeem 150,503 OP Units for shares of ROIC common stock on a one-for-one basis, and accordingly, 150,503 shares of ROIC common stock were issued. ROIC elected to redeem the remaining 7,064 OP Units in cash. The redemption value of the OP Units owned by the limited partners as of December 31, 2017 , not including ROIC, had such units been redeemed at December 31, 2017 , was approximately $229.5 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, 2017 , which amounted to $19.65 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, 2017
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 at December 31, 2017 is approximately $249.5 million , calculated using significant inputs which are not observable in the market. The fair value of the outstanding Senior Notes Due 2026 at December 31, 2017 is approximately $196.2 million , calculated using significant inputs which are not observable in the market. The fair value, based on inputs not quoted on active markets, but corroborated by market data, or Level 2, of the outstanding Senior Notes Due 2024 at December 31, 2017 is approximately $248.3 million . The fair value, based on inputs not quoted on active markets, but corroborated by market data, or Level 2, of the outstanding Senior Notes Due 2023 at December 31, 2017 is approximately $259.6 million . Assumed mortgage notes payable were recorded at their fair value at the time they were assumed and are estimated to have a fair value of approximately $72.7 million with an interest rate range of 4.0% to 5.0% and a weighted average interest rate of 4.2% as of December 31, 2017 . Mortgage notes payable originated by the Company are estimated to have a fair value of approximately $33.2 million with an interest rate of 4.6% as of December 31, 2017 . 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, 2017
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, 2017 (in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Bank of Montreal $ 50,000 1/29/2016 1/31/2019 Regions Bank $ 50,000 2/29/2016 1/31/2019 Bank of Montreal $ 100,000 12/29/2017 8/31/2022 U.S. Bank $ 100,000 12/29/2017 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, 2017 , 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, 2017: Assets Derivative financial instruments $ — $ 4,321 $ — $ 4,321 December 31, 2016 Assets Derivative financial instruments $ — $ 875 $ — $ 875 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 $712,000 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, 2017 and 2016 , respectively (in thousands): Derivatives designed as hedging instruments Balance sheet location December 31, 2017 Fair Value December 31, 2016 Fair Value Interest rate products Other assets $ 4,321 $ 875 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, 2017 , 2016 , and 2015 , respectively (in thousands). Amounts reclassified from other comprehensive income (“OCI”) due to ineffectiveness are recognized as interest expense. Year Ended December 31, 2017 2016 2015 Amount of gain recognized in OCI on derivatives $ 3,665 $ 541 $ — Amount of loss reclassified from accumulated OCI into interest $ 1,920 $ 2,473 $ 2,139

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
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 for certain properties. For financial reporting purposes, rent expense is recognized on a straight-line basis over the term of the lease. Accordingly, rent expense recognized in excess of rent paid is reflected as a liability in the accompanying consolidated balance sheets. Rent expense, for both ground leases and corporate office storage space, was approximately $1.5 million , $831,000 , and $1.2 million for the years ended December 31, 2017 , 2016 , and 2015 , respectively. The following table represents the Company’s future minimum annual lease payments under operating leases as of December 31, 2017 (in thousands): Operating Leases 2018 $ 1,273 2019 1,278 2020 1,286 2021 1,282 2022 1,304 Thereafter 35,347 Total minimum lease payments $ 41,770 Tax Protection Agreements In connection with the acquisition of the remaining 51% of the partnership interests in the Terranomics Crossroads Associates, LP and the acquisition of 100% of the equity interest in SARM Five Points Plaza LLC in September 2013, 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, for a period of 12 years, to indemnify the respective sellers receiving OP Units against certain tax liabilities incurred by them, as calculated pursuant to the respective Tax Protection Agreements. In connection with the acquisition of Wilsonville Town Center in December 2014, Iron Horse Plaza, Bellevue Marketplace and Warner Plaza in December 2015, Magnolia Shopping Center and Casitas Plaza Shopping Center in March 2016, and Santa Rosa Southside Shopping Center in March 2017 (more fully discussed in Footnote 2), 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, for a period of 10 years, to indemnify the respective sellers receiving OP Units against certain tax liabilities incurred by them, as calculated pursuant to the respective 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).

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
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, 2017 , 2016 , and 2015 , the Company incurred approximately $52,000 , $46,000 and $42,000 , respectively, of expenses relating to the agreements which were included in general and administrative expenses in the accompanying consolidated statements of operations and other comprehensive income.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2017
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, 2017 and 2016 for ROIC are as follows (in thousands, except share data): Year Ended December 31, 2017 March 31 June 30 September 30 December 31 Total revenues $ 65,900 $ 66,640 $ 67,966 $ 72,754 Net income $ 11,251 $ 9,197 $ 10,127 $ 12,113 Net income attributable to ROIC $ 10,170 $ 8,309 $ 9,149 $ 10,849 Basic and diluted income per share $ 0.09 $ 0.08 $ 0.08 $ 0.10 Year Ended December 31, 2016 March 31 June 30 September 30 December 31 Total revenues $ 56,094 $ 58,671 $ 59,354 $ 63,070 Net income $ 8,925 $ 8,638 $ 8,215 $ 10,652 Net income attributable to ROIC $ 8,027 $ 7,704 $ 7,402 $ 9,621 Basic and diluted income per share $ 0.08 $ 0.08 $ 0.07 $ 0.09 The unaudited quarterly results of operations for the years ended December 31, 2017 and 2016 for the Operating Partnership are as follows (in thousands, except unit data): Year Ended December 31, 2017 March 31 June 30 September 30 December 31 Total revenues $ 65,900 $ 66,640 $ 67,966 $ 72,754 Net income attributable to the Operating Partnership $ 11,251 $ 9,197 $ 10,127 $ 12,113 Basic and diluted income per unit $ 0.09 $ 0.08 $ 0.08 $ 0.10 Year Ended December 31, 2016 March 31 June 30 September 30 December 31 Total revenues $ 56,094 $ 58,671 $ 59,354 $ 63,070 Net income attributable to the Operating Partnership $ 8,925 $ 8,638 $ 8,215 $ 10,652 Basic and diluted income per unit $ 0.08 $ 0.08 $ 0.07 $ 0.09

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 20, 2018, the Company’s board of directors declared a cash dividend on its common stock of $0.1950 per share, payable on March 29, 2017 to holders of record on March 15, 2017.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2017
SEC Schedule III, 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, 2017 (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 & (a) Accumulated Depreciation (b) (1) Date of Acquisition Paramount Plaza, CA $ — $ 6,347 $ 10,274 $ 317 $ 2,157 $ 6,664 $ 12,431 $ 19,095 $ 3,004 12/22/2009 Santa Ana Downtown Plaza, CA — 7,895 9,890 — 3,746 7,895 13,636 21,531 2,747 1/26/2010 Meridian Valley Plaza, WA — 1,881 4,795 — 1,510 1,881 6,305 8,186 1,361 2/1/2010 The Market at Lake Stevens, WA — 3,087 12,397 — 420 3,087 12,817 15,904 3,000 3/16/2010 Norwood Shopping Center, CA — 3,031 11,534 122 1,782 3,153 13,316 16,469 3,065 4/5/2010 Pleasant Hill Marketplace, CA — 6,359 6,927 — 1,590 6,359 8,517 14,876 2,028 4/8/2010 Vancouver Market Center, WA — 4,080 6,912 — 3,097 4,080 10,009 14,089 1,889 6/17/2010 Happy Valley Town Center, OR — 11,678 27,011 — 2,046 11,678 29,057 40,735 6,753 7/14/2010 Cascade Summit, OR — 8,853 7,732 — 388 8,853 8,120 16,973 2,245 8/20/2010 Heritage Market Center, WA — 6,595 17,399 — 648 6,595 18,047 24,642 3,905 9/23/2010 Claremont Center, CA — 5,975 1,019 183 4,526 6,158 5,545 11,703 2,245 9/23/2010 Shops At Sycamore Creek, CA — 3,747 11,584 — 574 3,747 12,158 15,905 3,139 9/30/2010 Gateway Village, CA — 5,917 27,298 — 727 5,917 28,025 33,942 5,806 12/16/2010 Division Crossing, OR — 3,706 8,327 — 5,726 3,706 14,053 17,759 3,318 12/22/2010 Halsey Crossing, OR (2) — — 7,773 — 7,459 — 15,232 15,232 2,184 12/22/2010 Marketplace Del Rio,CA — 13,420 22,251 9 1,991 13,429 24,242 37,671 5,429 1/3/2011 Pinole Vista, CA — 12,894 30,670 — 2,659 12,894 33,329 46,223 5,274 1/6/2011 Desert Spring Marketplace, CA — 8,517 18,761 443 5,953 8,960 24,714 33,674 4,820 2/17/2011 Mills Shopping Center, CA — 4,084 16,833 — 10,646 4,084 27,479 31,563 6,435 2/17/2011 Morada Ranch, CA — 2,504 19,547 — 506 2,504 20,053 22,557 4,204 5/20/2011 Renaissance, CA — 8,640 13,848 — 639 8,640 14,487 23,127 2,710 8/3/2011 Country Club Gate, CA — 6,487 17,341 — 1,194 6,487 18,535 25,022 3,828 7/8/2011 Canyon Park, WA — 9,352 15,916 — 8,947 9,352 24,863 34,215 4,395 7/29/2011 Hawks Prairie, WA — 5,334 20,694 — 2,142 5,334 22,836 28,170 3,970 9/8/2011 Kress Building, WA — 5,693 20,866 — 4,680 5,693 25,546 31,239 5,271 9/30/2011 Round Hill Square, CA — 6,358 17,734 — 796 6,358 18,530 24,888 3,799 8/23/2011 Hillsboro, OR (2) — — 17,553 — 780 — 18,333 18,333 3,780 11/23/2011 Gateway Shopping Center, WA (2) — 6,242 23,462 — (4 ) 6,242 23,458 29,700 4,033 2/16/2012 Euclid Plaza, CA — 7,407 7,753 — 2,947 7,407 10,700 18,107 2,553 3/28/2012 Green Valley, CA — 1,685 8,999 — 631 1,685 9,630 11,315 1,963 4/2/2012 Aurora Square, WA — 3,002 1,693 — (22 ) 3,002 1,671 4,673 458 5/3/2012 Marlin Cove, CA — 8,815 6,797 — 1,955 8,815 8,752 17,567 1,892 5/4/2012 Seabridge, CA — 5,098 17,164 — 2,831 5,098 19,995 25,093 3,373 5/31/2012 Novato, CA — 5,329 4,412 — 1,335 5,329 5,747 11,076 829 7/24/2012 Glendora, CA — 5,847 8,758 — 166 5,847 8,924 14,771 1,766 8/1/2012 Wilsonville, WA — 4,181 15,394 — 559 4,181 15,953 20,134 2,639 8/1/2012 Bay Plaza, CA — 5,454 14,857 — 1,326 5,454 16,183 21,637 2,840 10/5/2012 Santa Theresa, CA 10,138 14,965 17,162 — 4,855 14,965 22,017 36,982 3,889 11/8/2012 Cypress West, CA — 15,480 11,819 80 2,023 15,560 13,842 29,402 2,615 12/7/2012 Redondo Beach, CA — 16,242 13,625 36 166 16,278 13,791 30,069 2,196 12/28/2012 Harbor Place, CA — 16,506 10,527 — 342 16,506 10,869 27,375 1,653 12/28/2012 Diamond Bar Town Center, CA — 9,540 16,795 — 3,501 9,540 20,296 29,836 3,736 2/1/2013 Bernardo Heights, CA — 3,192 8,940 — 701 3,192 9,641 12,833 1,521 2/6/2013 Canyon Crossing, WA — 7,941 24,659 — 2,874 7,941 27,533 35,474 4,670 4/15/2013 Diamond Hills, CA 35,500 15,458 29,353 — 223 15,458 29,576 45,034 4,443 4/22/2013 Granada Shopping Center, CA — 3,673 13,459 — 389 3,673 13,848 17,521 2,067 6/27/2013 Hawthorne Crossings, CA — 10,383 29,277 — 413 10,383 29,690 40,073 4,183 6/27/2013 Robinwood, CA — 3,997 11,317 12 887 4,009 12,204 16,213 1,810 8/23/2013 Five Points Plaza, CA — 17,920 36,965 — 3,593 17,920 40,558 58,478 5,027 9/27/2013 Crossroads Shopping Center, CA — 68,366 67,756 — 17,965 68,366 85,721 154,087 11,165 9/27/2013 Peninsula Marketplace, CA — 14,730 19,214 — 1,900 14,730 21,114 35,844 2,795 11/1/2013 Country Club Village, CA — 9,986 26,579 — 1,778 9,986 28,357 38,343 4,140 11/26/2013 Plaza de la Canada, CA (2) — 10,351 24,819 — 400 10,351 25,219 35,570 3,028 12/13/2013 Tigard Marketplace, CA — 13,587 9,603 — 513 13,587 10,116 23,703 1,670 2/18/2014 Creekside Plaza, CA — 14,807 29,476 — 185 14,807 29,661 44,468 3,968 2/28/2014 North Park Plaza, CA — 13,593 17,733 — 543 13,593 18,276 31,869 1,927 4/30/2014 Aurora Square II, WA — 7,323 11,644 — 353 7,323 11,997 19,320 1,271 5/22/2014 Fallbrook Shopping Center (2) — 21,232 186,197 83 7,215 21,315 193,412 214,727 20,913 6/13/2014 Moorpark Town Center, CA — 7,063 19,694 — 1,568 7,063 21,262 28,325 2,670 12/4/2014 Mission Foothill Marketplace, CA — 11,415 17,783 — 118 11,415 17,901 29,316 1,343 12/4/2014 Wilsonville Town Center, OR — 10,334 27,101 — 456 10,334 27,557 37,891 2,749 12/11/2014 Park Oaks Shopping Center, CA — 8,527 38,064 — 624 8,527 38,688 47,215 3,598 1/6/2016 Ontario Plaza, CA — 9,825 26,635 — 1,415 9,825 28,050 37,875 2,759 1/6/2015 Winston Manor, CA — 10,018 9,762 — 1,729 10,018 11,491 21,509 1,182 1/7/2015 Jackson Square, CA — 6,886 24,558 — 933 6,886 25,491 32,377 1,933 7/1/2015 Tigard Promenade, OR — 9,844 10,843 — 108 9,844 10,951 20,795 826 7/28/2015 Sunnyside Village Square, OR — 4,428 13,324 — 3,313 4,428 16,637 21,065 1,143 7/28/2015 Gateway Centre, CA — 16,275 28,308 — 2,858 16,275 31,166 47,441 2,130 9/1/2015 Johnson Creek, OR — 9,009 22,534 — 1,345 9,009 23,879 32,888 1,761 11/9/2015 Iron Horse Plaza, CA — 8,187 39,654 — 459 8,187 40,113 48,300 2,289 12/4/2015 Bellevue Marketplace, WA — 10,488 39,119 — 6,812 10,488 45,931 56,419 2,464 12/10/2015 Four Corner Square, WA — 9,926 31,415 — 459 9,926 31,874 41,800 2,136 12/21/2015 Warner Plaza Shopping Center, CA — 16,104 60,188 — 7,429 16,104 67,617 83,721 3,770 12/31/2015 Magnolia Shopping Center, CA 8,951 12,501 27,040 — 1,084 12,501 28,124 40,625 1,596 3/10/2016 Casitas Plaza Shopping Center, CA 7,307 9,905 18,731 — 297 9,905 19,028 28,933 1,096 3/10/2016 Bouquet Center, CA — 10,040 48,362 — 529 10,040 48,891 58,931 2,408 4/28/2016 North Ranch Shopping Center, CA — 31,522 95,916 — (6 ) 31,522 95,910 127,432 4,235 6/1/2016 Monterey Center, CA (2) — 1,073 10,609 — 2 1,073 10,611 11,684 486 7/14/2016 Rose City Center, OR (2) — 3,637 10,301 — — 3,637 10,301 13,938 467 9/15/2016 Trader Joe’s at the Knolls, CA — 9,726 18,299 — 20 9,726 18,319 28,045 702 10/3/2016 Bridle Trails Shopping Center, WA — 11,534 20,700 — 357 11,534 21,057 32,591 840 10/17/2016 Torrey Hills Corporate Center, CA — 5,579 3,915 — 1,393 5,579 5,308 10,887 138 12/6/2016 PCC Community Markets Plaza — 1,856 6,914 — 7 1,856 6,921 $ 8,777 207 1/25/2017 The Terraces — 18,378 37,103 — 355 18,378 37,458 $ 55,836 888 3/17/2017 Santa Rosa Southside Shopping Center — 5,593 24,453 — 1,279 5,593 25,732 $ 31,325 552 3/24/2017 Division Center — 6,917 26,098 — 242 6,917 26,340 $ 33,257 610 4/5/2017 Highland Hill Shopping Center — 10,511 37,825 — 293 10,511 38,118 $ 48,629 796 5/9/2017 Monta Loma Plaza — 18,223 11,113 — 3 18,223 11,116 $ 29,339 86 9/19/2017 Fullerton Crossroads 26,000 28,164 44,870 — — 28,164 44,870 $ 73,034 351 10/11/2017 Riverstone Marketplace 18,424 5,113 27,594 — 5 5,113 27,599 $ 32,712 210 10/11/2017 North Lynnwood Shopping Center — 4,923 10,335 — 2 4,923 10,337 $ 15,260 57 10/19/2017 The Village at Nellie Gail Ranch — 9,222 36,889 — 97 9,222 36,986 $ 46,208 — 11/30/2017 $ 106,320 $ 877,512 $ 2,055,143 $ 1,285 $ 175,457 $ 878,797 $ 2,230,600 $ 3,109,397 $ 260,115 (a) RECONCILIATION OF REAL ESTATE – OWNED SUBJECT TO OPERATING LEASES (in thousands) Year Ended December 31, 2017 2016 2015 Balance at beginning of period: $ 2,687,018 $ 2,296,617 $ 1,785,898 Property improvements during the year 54,481 41,359 28,104 Properties acquired during the year 374,004 354,035 485,853 Assets written off during the year (6,106 ) (4,993 ) (3,238 ) Balance at end of period: $ 3,109,397 $ 2,687,018 $ 2,296,617 (b) RECONCILIATION OF ACCUMULATED DEPRECIATION (in thousands) Year Ended December 31, 2017 2016 2015 Balance at beginning of period: $ 193,021 $ 134,311 $ 88,173 Depreciation expenses 72,725 63,872 49,619 Property assets fully depreciated and written off (5,631 ) (5,162 ) (3,481 ) Balance at end of period: $ 260,115 $ 193,021 $ 134,311 (1) Depreciation and investments in building and improvements reflected in the consolidated statement 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 $2.8 billion at December 31, 2017 .

Organization, Basis of Presen26

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
New Accounting Pronouncements	Recent Accounting Pronouncements In August 2017, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The pronouncement was issued to simplify the on-going assessment of hedge effectiveness and increase transparency related to hedge accounting. 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. 2017-12 effective July 1, 2017 using the modified retrospective approach. The Company determined there is no impact to the Company’s historical results as a result of adoption of the new standard and therefore no adjustment to retained earnings from application of the ASU. In January 2017, the FASB issued ASU No. 2017-1, “Business Combinations: Clarifying the Definition of a Business.” The pronouncement changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. The pronouncement requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities is not a business. 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 2017-1 effective October 1, 2016. For the period from October 1, 2016 through December 31, 2017, for the Company’s acquisitions it was concluded substantially all of the fair value of the assets acquired with each property acquisition was concentrated in a single identifiable asset and did not meet the definition of a business under ASU No. 2017-1. Acquisition transaction costs associated with these property acquisitions were capitalized to real estate investments. In February 2016, the FASB issued ASU No. 2016-2, “Leases.” ASU No. 2016-2 is expected to result 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. As of December 31, 2017 , the remaining contractual payments under ground lease agreements aggregated approximately $41.8 million . In addition, this ASU will require 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 will no longer be capitalized as initial direct costs and instead will be expensed as incurred. As a lessor, under current accounting standards, the Company recognizes rental revenue from its operating leases on a straight-line basis over the respective lease terms. The Company commences recognition of rental revenue at the date the property is ready for its intended use and the tenant takes possession of or controls the physical use of the property. Under current accounting standards, tenant recoveries related to payments of real estate taxes, insurance, utilities, repairs and maintenance, common area expenses, and other operating expenses are considered lease components. The Company recognizes these tenant recoveries as revenue when services are rendered in an amount equal to the related operating expenses incurred that are recoverable under the terms of the applicable lease. Under ASU 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 January 2018, the FASB issued a proposed amendment to ASU No. 2016-2 that would allow 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. If adopted, this practical expedient will allow 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 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 plans to adopt the provisions of ASU No. 2016-2 effective January 1, 2019 using the modified retrospective approach. The Company continues to evaluate the impact this pronouncement will have on the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-9, “Revenue from Contracts with Customers.” The pronouncement was issued to clarify the principles for recognizing revenue and to develop a common revenue standard and disclosure requirements for U.S. GAAP and International Financial Reporting Standards. The pronouncement is effective for reporting periods beginning after December 15, 2017. The Company will adopt the provisions of ASU No. 2014-9 effective January 1, 2018 using the modified retrospective approach. As discussed above, leases are specifically excluded from ASU No. 2014-9 and will be governed by the applicable lease codification; however, this update may have implications on certain variable payment terms included in lease agreements. Upon adoption of ASU No. 2016-2 in 2019, the Company may be required to classify its tenant recoveries into lease and nonlease components, whereby the nonlease components would be subject to the revenue recognition ASU, pending the resolution of the proposed amendment issued by the FASB in January 2018. Property services categorized as nonlease components that are reimbursed by the Company’s tenants may need to be presented on a net basis if it is determined that the Company holds an agent arrangement. The Company evaluated the revenue recognition for all contracts within this scope under existing accounting standards and under ASU No. 2014-9 and confirmed that there were no differences in the amounts recognized or the pattern of recognition. Therefore, the adoption of this ASU did not result in an adjustment to the Company’s retained earnings on January 1, 2018.
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. Effective January 1, 2016, the Company adopted the provisions of ASU No 2015-2, and as a result, concluded that the Operating Partnership is a VIE. The Company has concluded that 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 modifies 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 purchase price allocations, depreciable lives, revenue recognition and the collectability of tenant receivables, other receivables, notes receivables, the valuation of performance-based restricted stock, 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. In addition, taxable income from non-REIT activities managed through the Company’s taxable REIT subsidiary (“TRS”), if any, is fully subject to U.S. federal, state and local income taxes. 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, 2017 , the statute of limitations for tax years 2014 through and including 2016 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, 2017 and 2016 , capitalized costs related to the improvements or replacement of real estate properties were approximately $54.5 million and $41.4 million , respectively. 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 expensed acquisition transaction costs during the years ended December 31, 2017 , 2016 and 2015 of approximately $4,000 , $824,000 and $965,000 , 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 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 (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 (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 rental income, over the terms of the respective leases including option periods, if applicable. The value of in-place leases are 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.
Asset Impairment	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.
Cash and Cash Equivalents	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.
Restricted Cash	Restricted Cash Restricted cash primarily represents cash that is being held by a qualified intermediary in anticipation of the acquisition of a replacement property in a tax-free exchange under Section 1031 of the Code. Additionally, the terms of several of the Company’s mortgage loans payable 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. Property operating expense recoveries from tenants of common area maintenance, real estate taxes and other recoverable costs are recognized in the period the related expenses are incurred. Lease incentives are amortized as a reduction of rental revenue over the respective tenant lease terms. Termination fees (included in other 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 in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, “Revenue Recognition,” 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 under GAAP 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.
Depreciation and Amortization	Depreciation and Amortization The Company uses the straight-line method for depreciation and amortization. Buildings are depreciated over the estimated useful lives which the Company estimates to be 39 - 40 years. Property improvements are depreciated over the 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.
Internal Capitalized Leasing Costs	Internal Capitalized Leasing Costs The Company capitalizes a portion of payroll-related costs related to its leasing personnel associated with new leases and lease renewals. These costs are amortized over the life of the respective leases.
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, 2017 , 2016 and 2015 , 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 grants awarded under the 2009 Plan described in Note 8 are excluded from the basic EPS calculation, as these units are not participating securities until they vest.
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 plans based on the FASB guidance which requires that compensation expense be recognized based on the fair value of the stock awards less estimated forfeitures. Restricted stock grants vest based upon the completion of a service period (“time based grants”) and/or the Company meeting certain established market specific financial performance criteria (“performance based 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 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. Awards of stock options and time based grants of stock are expensed as compensation on a straight-line basis over the vesting period. Depending on the terms of the agreement, certain awards of performance based grants are expensed as compensation under an accelerated attribution method while certain are expensed as compensation on a straight-line basis over the vesting period. All awards of performance based grants are recognized in income regardless of the results of the performance criteria.
Derivatives	Derivatives The Company records all derivatives on the balance sheet 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 risk in a fair value hedge or the earnings effect of 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. The Company includes cash payments made to terminate interest rate derivative 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 financing 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.

Organization, Basis of Presen27

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
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 Sheet as of December 31, 2017 that will be charged to future operations are as follows (in thousands): Lease Origination Costs 2018 $ 7,937 2019 6,537 2020 5,267 2021 4,353 2022 3,425 Thereafter 9,648 $ 37,167 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 Sheet as of December 31, 2017 that will be charged to future operations are as follows (in thousands): Financing Costs 2018 $ 1,805 2019 1,793 2020 1,793 2021 1,525 2022 849 Thereafter 1,515 $ 9,280
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, 2017 2016 2015 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less income attributable to non-controlling interests (4,211 ) (3,676 ) (1,228 ) Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available for common stockholders, basic $ 38,158 $ 32,484 $ 23,635 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available for common stockholders, diluted $ 42,369 $ 36,160 $ 24,863 Denominator: Denominator for basic EPS – weighted average common equivalent shares 109,400,123 104,072,222 95,651,780 OP units 12,060,835 11,747,509 4,086,724 Restricted stock awards – performance-based 153,807 86,996 174,198 Stock options 129,066 133,213 105,079 Denominator for diluted EPS – weighted average common equivalent shares 121,743,831 116,039,940 100,017,781
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, 2017 2016 2015 Numerator: Net income $ 42,688 $ 36,430 $ 25,092 Less earnings allocated to unvested shares (319 ) (270 ) (229 ) Net income available to unitholders, basic and diluted $ 42,369 $ 36,160 $ 24,863 Denominator: Denominator for basic earnings per unit – weighted average common equivalent units 121,460,958 115,819,731 99,738,504 Restricted stock awards – performance-based 153,807 86,996 174,198 Stock options 129,066 133,213 105,079 Denominator for diluted earnings per unit – weighted average common equivalent units 121,743,831 116,039,940 100,017,781

Real Estate Investments (Tables

Real Estate Investments (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017 and 2016 (in thousands). December 31, 2017 December 31, 2016 Assets Land $ 109,356 $ 96,113 Building and improvements 265,040 258,584 Acquired lease intangible asset 22,024 19,667 Deferred charges 8,034 6,876 Assets acquired $ 404,454 $ 381,240 Liabilities Mortgage notes assumed $ 46,034 $ 17,618 Acquired lease intangible liability 45,456 32,615 Liabilities assumed $ 91,490 $ 50,233
Business Acquisition, Pro Forma Information	The pro forma financial information set forth below is presented for informational purposes only and may not be indicative of what actual results of operations would have been had the transactions occurred as if they occurred on January 1 2015, nor does it purport to represent the results of future operations. The below pro forma financial information does not include asset acquisitions that occurred during the year ended December 31, 2017 or the three months ended December 31, 2016 (in thousands). Year Ended December 31, 2016 Statement of operations: Revenues $ 245,116 Net income attributable to Retail Opportunity Investments Corp. $ 33,169
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, 2016 for the properties acquired during the year ended December 31, 2016 (in thousands). Year Ended December 31, 2016 Statement of operations: Revenues $ 15,230 Net income attributable to Retail Opportunity Investments Corp. $ 2,513 The following table summarizes the operating results included in the Company’s historical consolidated statement of operations for the year ended December 31, 2017 for the properties acquired during the year ended December 31, 2017 (in thousands). Year Ended December 31, 2017 Statement of operations: Revenues $ 13,500 Net income attributable to Retail Opportunity Investments Corp. $ 2,948

Acquired Lease Intangibles (Tab

Acquired Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2017
Acquired Lease Intangibles (Tables) [Line Items]
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	Intangible assets and liabilities as of December 31, 2017 and 2016 consisted of the following (in thousands): December 31, 2017 December 31, 2016 Assets: In-place leases $ 99,924 $ 93,952 Accumulated amortization (36,971 ) (33,034 ) Above-market leases 33,176 30,251 Accumulated amortization (13,351 ) (11,964 ) Acquired lease intangible assets, net $ 82,778 $ 79,205 Liabilities: Below-market leases $ 222,929 $ 190,321 Accumulated amortization (43,945 ) (35,363 ) Acquired lease intangible liabilities, net $ 178,984 $ 154,958
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, 2017 is as follows (in thousands): Year Ending December 31: 2018 $ 14,085 2019 10,270 2020 8,312 2021 6,554 2022 5,523 Thereafter 38,034 Total future amortization of acquired lease intangible assets $ 82,778
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, 2017 is as follows (in thousands): Year Ending December 31: 2018 $ 15,297 2019 14,334 2020 13,275 2021 12,064 2022 11,045 Thereafter 112,969 Total future amortization of acquired lease intangible liabilities $ 178,984

Tenant Leases (Tables)

Tenant Leases (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017 are summarized as follows (in thousands): Year Ending December 31: 2018 $ 193,314 2019 175,008 2020 153,451 2021 131,249 2022 105,293 Thereafter 448,171 Total minimum lease payments $ 1,206,486

Mortgage Notes Payable, Credi31

Mortgage Notes Payable, Credit Facilities and Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Schedule of Debt	The mortgage notes payable collateralized by respective properties and assignment of leases at December 31, 2017 and December 31, 2016 , respectively, were as follows (in thousands, except interest rates): Property Maturity Date Interest Rate December 31, 2017 December 31, 2016 Bernardo Heights Plaza July 2017 5.700 % $ — $ 8,216 Santa Teresa Village February 2018 6.200 % 10,138 10,383 Magnolia Shopping Center October 2018 5.500 % 8,951 9,135 Casitas Plaza Shopping Center June 2022 5.320 % 7,307 7,449 Riverstone Marketplace July 2022 4.960 % 18,424 — Fullerton Crossroads April 2024 4.728 % 26,000 — Diamond Hills Plaza October 2025 3.550 % 35,500 35,500 $ 106,320 $ 70,683 Mortgage premiums 1,921 1,037 Net unamortized deferred financing costs (326 ) (417 ) Total mortgage notes payable $ 107,915 $ 71,303
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 2018 $ 18,900 $ 712 $ 493 $ 20,105 2019 — 550 360 910 2020 — 577 360 937 2021 — 717 360 1,077 2022 23,130 1,003 223 24,356 Thereafter 58,787 1,944 125 60,856 Total $ 100,817 $ 5,503 $ 1,921 $ 108,241
Schedule of Long-term Debt Instruments	The carrying values of the Company’s unsecured revolving credit facility were as follows (in thousands): December 31, 2017 December 31, 2016 Credit facility $ 143,500 $ 98,000 Net unamortized deferred financing costs (3,171 ) (2,346 ) Credit facility $ 140,329 $ 95,654 The carrying value of the Company’s unsecured Senior Notes Due 2027 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ — Net unamortized deferred financing costs (1,249 ) — Senior Notes Due 2027 $ 248,751 $ — The carrying value of the Company’s unsecured Senior Notes Due 2024 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (2,578 ) (2,891 ) Net unamortized deferred financing costs (1,535 ) (1,755 ) Senior Notes Due 2024 $ 245,887 $ 245,354 The carrying value of the Company’s unsecured Senior Notes Due 2023 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 250,000 $ 250,000 Unamortized debt discount (2,737 ) (3,119 ) Net unamortized deferred financing costs (1,567 ) (1,830 ) Senior Notes Due 2023 $ 245,696 $ 245,051 The carrying value of the Company’s unsecured Senior Notes Due 2026 is as follows (in thousands): December 31, 2017 December 31, 2016 Principal amount $ 200,000 $ 200,000 Net unamortized deferred financing costs (248 ) (273 ) Senior Notes Due 2026 $ 199,752 $ 199,727 The carrying values of the Company’s unsecured term loan (the “term loan”) were as follows (in thousands): December 31, 2017 December 31, 2016 Term loan $ 300,000 $ 300,000 Net unamortized deferred financing costs (1,184 ) (809 ) Term loan $ 298,816 $ 299,191

Stock Compensation and Other 32

Stock Compensation and Other Benefit Plans for ROIC (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	Shares Weighted Average Non-vested at December 31, 2016 660,458 $ 16.10 Granted 419,394 $ 19.58 Vested (296,386 ) $ 15.61 Forfeited (1,999 ) $ 19.66 Non-vested at December 31, 2017 781,467 $ 18.14

Derivative and Hedging Activi33

Derivative and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017 (in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Bank of Montreal $ 50,000 1/29/2016 1/31/2019 Regions Bank $ 50,000 2/29/2016 1/31/2019 Bank of Montreal $ 100,000 12/29/2017 8/31/2022 U.S. Bank $ 100,000 12/29/2017 8/31/2022
Schedule of Derivative 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, 2017: Assets Derivative financial instruments $ — $ 4,321 $ — $ 4,321 December 31, 2016 Assets Derivative financial instruments $ — $ 875 $ — $ 875
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, 2017 and 2016 , respectively (in thousands): Derivatives designed as hedging instruments Balance sheet location December 31, 2017 Fair Value December 31, 2016 Fair Value Interest rate products Other assets $ 4,321 $ 875
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, 2017 , 2016 , and 2015 , respectively (in thousands). Amounts reclassified from other comprehensive income (“OCI”) due to ineffectiveness are recognized as interest expense. Year Ended December 31, 2017 2016 2015 Amount of gain recognized in OCI on derivatives $ 3,665 $ 541 $ — Amount of loss reclassified from accumulated OCI into interest $ 1,920 $ 2,473 $ 2,139

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	The following table represents the Company’s future minimum annual lease payments under operating leases as of December 31, 2017 (in thousands): Operating Leases 2018 $ 1,273 2019 1,278 2020 1,286 2021 1,282 2022 1,304 Thereafter 35,347 Total minimum lease payments $ 41,770

Quarterly Results of Operatio35

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017 and 2016 for ROIC are as follows (in thousands, except share data): Year Ended December 31, 2017 March 31 June 30 September 30 December 31 Total revenues $ 65,900 $ 66,640 $ 67,966 $ 72,754 Net income $ 11,251 $ 9,197 $ 10,127 $ 12,113 Net income attributable to ROIC $ 10,170 $ 8,309 $ 9,149 $ 10,849 Basic and diluted income per share $ 0.09 $ 0.08 $ 0.08 $ 0.10 Year Ended December 31, 2016 March 31 June 30 September 30 December 31 Total revenues $ 56,094 $ 58,671 $ 59,354 $ 63,070 Net income $ 8,925 $ 8,638 $ 8,215 $ 10,652 Net income attributable to ROIC $ 8,027 $ 7,704 $ 7,402 $ 9,621 Basic and diluted income per share $ 0.08 $ 0.08 $ 0.07 $ 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, 2017 and 2016 for the Operating Partnership are as follows (in thousands, except unit data): Year Ended December 31, 2017 March 31 June 30 September 30 December 31 Total revenues $ 65,900 $ 66,640 $ 67,966 $ 72,754 Net income attributable to the Operating Partnership $ 11,251 $ 9,197 $ 10,127 $ 12,113 Basic and diluted income per unit $ 0.09 $ 0.08 $ 0.08 $ 0.10 Year Ended December 31, 2016 March 31 June 30 September 30 December 31 Total revenues $ 56,094 $ 58,671 $ 59,354 $ 63,070 Net income attributable to the Operating Partnership $ 8,925 $ 8,638 $ 8,215 $ 10,652 Basic and diluted income per unit $ 0.08 $ 0.08 $ 0.07 $ 0.09

Organization, Basis of Presen36

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)segment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]
Remaining contractual payments under ground lease agreements	$ 41,770
Taxable income minimum distribution portion not subject to federal taxation (in percentage)	90.00%
Real estate improvements	$ 54,500	$ 41,400
Acquisition transaction costs	4	824	$ 965
Allowance for doubtful accounts receivable	6,400	5,200
Payroll related costs capitalized	$ 1,200	$ 1,200	$ 1,100
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

Organization, Basis of Presen37

Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges [Line Items]
Deferred Costs	$ 37,167	$ 34,753
Lease Origination Costs
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges [Line Items]
2,018	7,937
2,019	6,537
2,020	5,267
2,021	4,353
2,022	3,425
Thereafter	9,648
Deferred Costs	37,167
Financing Costs
Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Unamortized Balances of Deferred Charges [Line Items]
2,018	1,805
2,019	1,793
2,020	1,793
2,021	1,525
2,022	849
Thereafter	1,515
Deferred Costs	$ 9,280

Organization, Basis of Presen38

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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income	$ 12,113	$ 10,127	$ 9,197	$ 11,251	$ 10,652	$ 8,215	$ 8,638	$ 8,925	$ 42,688	$ 36,430	$ 25,092
Less income attributable to non-controlling interests									(4,211)	(3,676)	(1,228)
Less earnings allocated to unvested shares, basic									(319)	(270)	(229)
Less earnings allocated to unvested shares, diluted									(319)	(270)	(229)
Net income available to common stockholders, basic									38,158	32,484	23,635
Net income available to common stockholders, diluted									$ 42,369	$ 36,160	$ 24,863
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)									109,400,123	104,072,222	95,651,780
OP Units (in shares)									12,060,835	11,747,509	4,086,724
Denominator for diluted EPS – weighted average common equivalent shares (in shares)									121,743,831	116,039,940	100,017,781
Retail Opportunity Investments Partnership L.P.
Numerator:
Net income	$ 12,113	$ 10,127	$ 9,197	$ 11,251	$ 10,652	$ 8,215	$ 8,638	$ 8,925	$ 42,688	$ 36,430	$ 25,092
Less earnings allocated to unvested shares, basic									(319)	(270)	(229)
Net income available to unitholders, basic and diluted									$ 42,369	$ 36,160	$ 24,863
Denominator:
Denominator for basic EPS – weighted average common equivalent shares (in shares)									121,460,958	115,819,731	99,738,504
Denominator for diluted EPS – weighted average common equivalent shares (in shares)									121,743,831	116,039,940	100,017,781
Restricted stock awards – performance-based
Denominator:
Restricted units and stock options (in shares)									153,807	86,996	174,198
Restricted stock awards – performance-based | Retail Opportunity Investments Partnership L.P.
Denominator:
Restricted units and stock options (in shares)									153,807	86,996	174,198
Stock options
Denominator:
Restricted units and stock options (in shares)									129,066	133,213	105,079
Stock options | Retail Opportunity Investments Partnership L.P.
Denominator:
Restricted units and stock options (in shares)									129,066	133,213	105,079

Real Estate Investments (Acquis

Real Estate Investments (Acquisitions) (Details) ft² in Thousands, $ in Thousands

Nov. 30, 2017USD ($)ft²

Oct. 19, 2017USD ($)ft²

Oct. 11, 2017USD ($)ft²shares

Sep. 19, 2017USD ($)ft²

May 09, 2017USD ($)ft²

Apr. 05, 2017USD ($)ft²

Mar. 24, 2017USD ($)ft²shares

Mar. 17, 2017USD ($)ft²

Jan. 25, 2017USD ($)ft²

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)ft²property

Dec. 31, 2015USD ($)

Note 2 - Real Estate Investments (Details) [Line Items]

Area of real estate property (in Square Feet) | ft²

596

Issuance of OP Units in connection with acquisitions

$ 49,599

$ 46,140

$ 150,315

Fair value of assumed mortgages upon acquisition

$ 46,034

$ 17,618

$ 19,024

Number of business acquired | property

6

Consideration transfered under old method

$ 270,900

Fullerton Crossroads and Riverstone Marketplace

Note 2 - Real Estate Investments (Details) [Line Items]

LP capital account, units issued (in shares) | shares

2,405,430

Issuance of OP Units in connection with acquisitions

$ 46,000

Fair value of assumed mortgages upon acquisition

46,000

Edmonds, Washington | PCC Community Markets Plaza

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 8,700

Area of real estate property (in Square Feet) | ft²

34

Rancho Palos Verdes, California | The Terraces

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 54,200

Area of real estate property (in Square Feet) | ft²

173

Santa Rosa, California | Santa Rosa Southside Shopping Center

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 28,900

Area of real estate property (in Square Feet) | ft²

86

LP capital account, units issued (in shares) | shares

168,497

Issuance of OP Units in connection with acquisitions

$ 3,600

Portland, Oregon | Division Center

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 33,100

Area of real estate property (in Square Feet) | ft²

122

Tacoma, Washington | North Ranch Shopping Center, CA

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 47,400

Area of real estate property (in Square Feet) | ft²

164

Mountain view, California | Monta Loma Plaza

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 30,000

Area of real estate property (in Square Feet) | ft²

48

Fullerton, California | Fullerton Crossroads

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 61,600

Area of real estate property (in Square Feet) | ft²

220

Vancouver, Washington | Riverstone Marketplace

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 31,700

Area of real estate property (in Square Feet) | ft²

96

Vancouver, Washington | Fullerton Crossroads and Riverstone Marketplace

Note 2 - Real Estate Investments (Details) [Line Items]

LP capital account, units issued (in shares) | shares

2,405,430

North Lynnwood, Washington | North Lynnwood Shopping Center

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 13,300

Area of real estate property (in Square Feet) | ft²

64

Orange County | The Village at Nellie Gail Ranch

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 46,100

Area of real estate property (in Square Feet) | ft²

88

West Coast

Note 2 - Real Estate Investments (Details) [Line Items]

Consideration transferred

$ 76,900

Area of real estate property (in Square Feet) | ft²

239

Real Estate Investments (Detail

Real Estate Investments (Details) - Purchase Price Allocation of Properties Acquired - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Business Combinations [Abstract]
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Land	$ 109,356
Assets
Land		$ 96,113
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Building and Improvements	265,040
Building and improvements		258,584
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets	22,024
Acquired lease intangible asset		19,667
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deferred Charges	8,034
Deferred charges		6,876
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets	404,454
Assets acquired		381,240
Liabilities
Mortgage notes assumed		17,618
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Lease Intangible Liability	45,456
Acquired lease intangible liability		32,615
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Liabilities	91,490
Liabilities assumed		$ 50,233
Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Long-term Debt	$ 46,034

Real Estate Investments (Deta41

Real Estate Investments (Details) - Pro Forma Financial Information - Results of Operations Had the Acquisitions Occurred at the Beginning of the Year $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Business Combinations [Abstract]
Revenues	$ 245,116
Net income attributable to Retail Opportunity Investments Corp.	$ 33,169

Real Estate Investments (Deta42

Real Estate Investments (Details) - Operating Results Included in the Company's Historical Consolidated Statement of Operations for Properties Acquired During the Reported Periods - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of operations:
Revenues	$ 72,754	$ 67,966	$ 66,640	$ 65,900	$ 63,070	$ 59,354	$ 58,671	$ 56,094	$ 273,260	$ 237,189	$ 192,699
Net income attributable to Retail Opportunity Investments Corp.	$ 10,849	$ 9,149	$ 8,309	$ 10,170	$ 9,621	$ 7,402	$ 7,704	$ 8,027	38,477	32,754	$ 23,864
Attributable to Acquired Properties During the Reporting Periods
Statement of operations:
Revenues									13,500	15,230
Net income attributable to Retail Opportunity Investments Corp.									$ 2,948	$ 2,513

Acquired Lease Intangibles (Nar

Acquired Lease Intangibles (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of above and below Market Leases	$ 17,078	$ 13,847	$ 9,890
Amortization of acquired in place leases	$ 14,400	$ 15,600	$ 13,200

Acquired Lease Intangibles (Det

Acquired Lease Intangibles (Details) - Intangible Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Assets acquired in place	$ 82,778	$ 79,205
Acquired lease intangible assets, net	82,778	79,205
Liabilities:
Below-market leases	222,929	190,321
Accumulated amortization	(43,945)	(35,363)
Acquired lease intangible liabilities, net	178,984	154,958
In-place leases
Assets:
Assets acquired in place	99,924	93,952
Accumulated amortization	(36,971)	(33,034)
Above-market leases
Assets:
Assets acquired in place	33,176	30,251
Accumulated amortization	$ (13,351)	$ (11,964)

Acquired Lease Intangibles (D45

Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 82,778	$ 79,205
Acquired Lease Intangible Assets
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
2,018	14,085
2,019	10,270
2,020	8,312
2,021	6,554
2,022	5,523
Thereafter	38,034
Acquired lease intangible assets, net	$ 82,778

Acquired Lease Intangibles (D46

Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities [Line Items]
Acquired lease intangible liabilities, net	$ 178,984	$ 154,958
Acquired Lease Intangible Liabilities
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Liabilities [Line Items]
2,018	15,297
2,019	14,334
2,020	13,275
2,021	12,064
2,022	11,045
Thereafter	112,969
Acquired lease intangible liabilities, net	$ 178,984

Tenant Leases (Details) - Minim

Tenant Leases (Details) - Minimum Future Rentals to be Received under Non-cancellable Leases $ in Thousands	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 193,314
2,019	175,008
2,020	153,451
2,021	131,249
2,022	105,293
Thereafter	448,171
Total minimum lease payments	$ 1,206,486

Mortgage Notes Payable, Credi48

Mortgage Notes Payable, Credit Facilities and Senior Notes (Narrative) (Details)

May 11, 2017USD ($)

Dec. 03, 2014USD ($)

Dec. 09, 2013USD ($)

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Nov. 10, 2017USD ($)

Oct. 11, 2017USD ($)loan

Sep. 08, 2017USD ($)

Jul. 26, 2017USD ($)

Jun. 30, 2017USD ($)

Jul. 26, 2016USD ($)

Sep. 29, 2015USD ($)

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Number of loans assumed | loan

2

Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Long-term Debt

$ 46,034,000

Principal repayments on mortgages

8,848,000

$ 7,816,000

$ 84,308,000

Revolving Credit Facility

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Line of credit facility, maximum borrowing capacity

$ 600,000,000

$ 500,000,000

Credit facility

$ 143,500,000

98,000,000

Line of credit facility, interest rate during period (in percentage)

2.10%

Remaining borrowing capacity

$ 456,500,000

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

Loan Agreements

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Line of credit facility, commitment fee (in percentage)

0.20%

Line of credit, fronting fee (in percentage)

0.125%

Eurodollar | Loan Agreements

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Basis Spread on variable rate (in percentage)

1.00%

Federal Funds Rate | Loan Agreements

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Basis Spread on variable rate (in percentage)

0.50%

Term Loan Agreement

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Debt, face amount

$ 300,000,000

Additional borrowing capacity

$ 200,000,000

Interest rate during period (in percentage)

2.20%

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)

1.10%

Senior Notes Due 2027

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Debt, face amount

$ 250,000,000

0

$ 250,000,000

Interest Rate (in percentage)

4.19%

Interest expense, debt

466,000

Deferred finance costs

$ 1,300,000

Senior Notes Due 2026

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Debt, face amount

200,000,000

200,000,000

$ 200,000,000

Interest Rate (in percentage)

3.95%

Interest expense, debt

7,900,000

2,200,000

Deferred finance costs

$ 283,000

Senior Notes Due 2024

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Debt, face amount

$ 250,000,000

Debt Instrument, Maturity Date

Dec. 15, 2024

Interest Rate (in percentage)

4.00%

Interest expense, debt

10,000,000

10,000,000

Deferred finance costs

$ 2,200,000

Amortization of debt discount

313,000

300,000

Senior Notes Due 2023

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Debt, face amount

$ 250,000,000

Debt Instrument, Maturity Date

Dec. 15, 2023

Interest Rate (in percentage)

5.00%

Interest expense, debt

12,500,000

12,500,000

Deferred finance costs

$ 2,600,000

Amortization of debt discount

$ 382,000

$ 363,000

Fullerton Crossroads

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Long-term Debt

$ 26,000,000

Interest Rate (in percentage)

4.728%

Riverstone Marketplace

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Asset Acquisition, Recognized Identifiable Assets Acquired And Liabilities Assumed, Long-term Debt

$ 18,500,000

Interest Rate (in percentage)

4.96%

Bernardo Heights Plaza

Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]

Principal repayments on mortgages

$ 8,100,000

Interest Rate (in percentage)

5.70%

Mortgage Notes Payable, Credi49

Mortgage Notes Payable, Credit Facilities and Senior Notes - Mortgage Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Long-term debt	$ 106,320	$ 70,683
Mortgage premiums	1,921	1,037
Net unamortized deferred financing costs	(326)	(417)
Total mortgage notes payable	$ 107,915	71,303
Bernardo Heights Plaza
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	5.70%
Long-term debt	$ 0	8,216
Santa Teresa Village
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	6.20%
Long-term debt	$ 10,138	10,383
Magnolia Shopping Center
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	5.50%
Long-term debt	$ 8,951	9,135
Casitas Plaza Shopping Center
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	5.32%
Long-term debt	$ 7,307	7,449
Riverstone Marketplace
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	4.96%
Long-term debt	$ 18,424	0
Fullerton Crossroads
Mortgage Notes Payable, Credit Facilities and Senior Notes [Line Items]
Interest Rate (in percentage)	4.728%
Long-term debt	$ 26,000	0
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, Credi50

Mortgage Notes Payable, Credit Facilities and Senior Notes - Combined Aggregate Principal Maturities of Mortgage Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Principal Repayments
Long-term Debt	$ 298,816	$ 299,191
Mortgage Premium
Total	1,921	1,037
Total
Total mortgage notes payable	107,915	$ 71,303
Mortgage Notes Payable
Principal Repayments
2,018	18,900
2,019	0
2,020	0
2,021	0
2,022	23,130
Thereafter	58,787
Long-term Debt	100,817
Scheduled Amortization
2,018	712
2,019	550
2,020	577
2,021	717
2,022	1,003
Thereafter	1,944
Total	5,503
Mortgage Premium
2,017	493
2,018	360
2,019	360
2,020	360
2,021	223
Thereafter	125
Total	1,921
Total
2,018	20,105
2,019	910
2,020	937
2,021	1,077
2,022	24,356
Thereafter	60,856
Total mortgage notes payable	$ 108,241

Mortgage Notes Payable, Credi51

Mortgage Notes Payable, Credit Facilities and Senior Notes - Carrying Value of the Company’s Senior Notes (Details) - USD ($)	Dec. 31, 2017	Nov. 10, 2017	Dec. 31, 2016	Jul. 26, 2016	Sep. 29, 2015	Dec. 03, 2014	Dec. 09, 2013
Debt Instrument [Line Items]
Long-term debt	$ 106,320,000		$ 70,683,000
Net unamortized deferred financing costs	(326,000)		(417,000)
Long-term Debt	298,816,000		299,191,000
Credit facility	140,329,000		95,654,000
Senior Notes Due 2027
Debt Instrument [Line Items]
Principal amount	250,000,000	$ 250,000,000	0
Net unamortized deferred financing costs	(1,249,000)		0
Senior Notes	248,751,000		0
Term Loan Agreement
Debt Instrument [Line Items]
Long-term debt	300,000,000		300,000,000
Principal amount					$ 300,000,000
Net unamortized deferred financing costs	(1,184,000)		(809,000)
Long-term Debt	298,816,000		299,191,000
Senior Notes Due 2026
Debt Instrument [Line Items]
Principal amount	200,000,000		200,000,000	$ 200,000,000
Net unamortized deferred financing costs	(248,000)		(273,000)
Senior Notes	199,752,000		199,727,000
Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt	250,000,000		250,000,000
Principal amount						$ 250,000,000
Unamortized debt discount	(2,578,000)		(2,891,000)
Net unamortized deferred financing costs	(1,535,000)		(1,755,000)
Senior Notes	245,887,000		245,354,000
Senior Notes Due 2023
Debt Instrument [Line Items]
Long-term debt	250,000,000		250,000,000
Principal amount							$ 250,000,000
Unamortized debt discount	(2,737,000)		(3,119,000)
Net unamortized deferred financing costs	(1,567,000)		(1,830,000)
Senior Notes	245,696,000		245,051,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility	143,500,000		98,000,000
Net unamortized deferred financing costs	(3,171,000)		(2,346,000)
Credit facility	$ 140,329,000		$ 95,654,000

Preferred Stock of ROIC (Detail

Preferred Stock of ROIC (Details) - shares	Dec. 31, 2017	Dec. 31, 2016
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)	Dec. 12, 2017$ / sharesshares	Jul. 12, 2016USD ($)shares	Sep. 19, 2014USD ($)agreement$ / shares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)	Oct. 11, 2017shares	Sep. 08, 2017USD ($)	Jun. 30, 2017USD ($)	Jul. 31, 2013USD ($)
Common Stock and Warrants of ROIC (Details) [Line Items]
Common stock issued (in shares) | shares		6,555,000
Proceeds from the issuance of OP Units in connection with issuance of common stock		$ 133,000,000		$ 4,481,000	$ 184,881,000	$ 101,293,000
Common stock, par value (in usd per share) | $ / shares				$ 0.0001	$ 0.0001
Stock issuance costs				$ 1,225,000	$ 7,097,000	$ 4,739,000
Stock repurchase program, authorized amount										$ 50,000,000
Sales Agreement
Common Stock and Warrants of ROIC (Details) [Line Items]
Common stock issued (in shares) | shares				34,001	2,202,254
Proceeds from the issuance of OP Units in connection with issuance of common stock				$ 681,000	$ 45,600,000
Number of sales agreements | agreement			3
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			$ 100,000,000
Stock issuance costs				9,000	$ 584,000
Revolving Credit Facility
Common Stock and Warrants of ROIC (Details) [Line Items]
Line of credit facility, maximum borrowing capacity								$ 600,000,000	$ 500,000,000
Fullerton Crossroads and Riverstone Marketplace
Common Stock and Warrants of ROIC (Details) [Line Items]
LP capital account, units issued (in shares) | shares							2,405,430
Vancouver, Washington | Fullerton Crossroads and Riverstone Marketplace
Common Stock and Warrants of ROIC (Details) [Line Items]
LP capital account, units issued (in shares) | shares							2,405,430
Common stock issued (in shares) | shares	2,584,254
Share price (usd per share) | $ / shares	$ 21.25
Restricted cash				$ 3,800,000

Stock Compensation and Other 54

Stock Compensation and Other Benefit Plans for ROIC (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Compensation expense	$ 6,200	$ 4,900	$ 4,700
Employer discretionary contribution amount	$ 70	76	31
The 2009 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)	4,000,000
Restricted Stock
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Grants in period (in shares)	419,394
Restricted Stock | The 2009 Plan
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Grants in period (in shares)	419,394
Compensation cost not yet recognized	$ 7,000
Compensation cost not yet recognized, period for recognition (in years)	1 year 255 days
Vested in period, fair value	$ 6,300	$ 5,600	$ 4,600
Restricted stock awards – performance-based | Vesting on January 1, 2019 | The 2009 Plan
Stock Compensation and Other Benefit Plans for ROIC (Details) [Line Items]
Grants in period (in shares)	149,475

Stock Compensation and Other 55

Stock Compensation and Other Benefit Plans for ROIC (Details) - Status of Non-vested Restricted Stock Awards - Restricted Stock	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Shares
Beginning balance ( in shares) | shares	660,458
Granted (in shares) | shares	419,394
Vested (in shares) | shares	(296,386)
Forfeited (in shares) | shares	(1,999)
Ending balance (in shares) | shares	781,467
Weighted Average Grant Date Fair Value
Beginning balance (in usd per share) | $ / shares	$ 16.10
Granted (in usd per share) | $ / shares	19.58
Vested (in usd per share) | $ / shares	15.61
Forfeited (in usd per share) | $ / shares	19.66
Ending balance (in usd per share) | $ / shares	$ 18.14

Capital of the Operating Part56

Capital of the Operating Partnership (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		Dec. 12, 2017	Jul. 12, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 11, 2017	Dec. 31, 2014
Capital of the Operating Partnership [Line Items]
Ownership interest (in percentage)				90.50%
Shares outstanding (in shares)				112,347,451	109,301,762
Remaining units outstanding ( in shares)				124,026,442
Proceeds from the issuance of common stock (in shares)			6,555,000
Cash redemption of OP Units (in shares)				157,567
ROIC common stock (in shares)				150,503
Equity redemption of OP Units, cash (in shares)				7,064
OP Units
Capital of the Operating Partnership [Line Items]
Non-controlling interest redemption value (in usd per share)				$ 19.65
Non-controlling interest redemption value				$ 229.5
Common Stock
Capital of the Operating Partnership [Line Items]
Shares outstanding (in shares)				112,347,451	109,301,762	99,531,034		92,991,333
Proceeds from the issuance of common stock (in shares)				212,825	8,757,254	6,064,567
ROIC common stock (in shares)				150,503	755,762	174,959
Retail Opportunity Investments Partnership L.P. | Limited Partner’s Capital
Capital of the Operating Partnership [Line Items]
Limited Partners' Capital Account, Units Outstanding	[1]			11,678,991
Remaining units outstanding ( in shares)	[1]				11,668,061	12,195,603		3,921,314
Cash redemption of OP Units (in shares)	[1]			7,064	2,206,613
ROIC common stock (in shares)	[1]			(2,555,933)	(755,762)	(174,959)
Fullerton Crossroads and Riverstone Marketplace
Capital of the Operating Partnership [Line Items]
LP capital account, units issued (in shares)							2,405,430
Fullerton Crossroads and Riverstone Marketplace | Vancouver, Washington
Capital of the Operating Partnership [Line Items]
LP capital account, units issued (in shares)							2,405,430
Restricted cash		$ 3.8
Proceeds from the issuance of common stock (in shares)		2,584,254
[1]	Consists of limited partnership interests held by third parties.

Fair Value of Financial Instr57

Fair Value of Financial Instruments (Schedule) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Minimum | Assumed Mortgage Notes Payable
Fair Value of Financial Instruments (Details) [Line Items]
Interest rate (in percentage)	4.00%
Maximum | Assumed Mortgage Notes Payable
Fair Value of Financial Instruments (Details) [Line Items]
Interest rate (in percentage)	5.00%
Weighted Average | Assumed Mortgage Notes Payable
Fair Value of Financial Instruments (Details) [Line Items]
Interest rate (in percentage)	4.20%
Significant Other Observable Inputs (Level 2) | Senior Notes Due 2024
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	$ 248.3
Significant Other Observable Inputs (Level 2) | Senior Notes Due 2023
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	259.6
Significant Unobservable Inputs (Level 3) | Assumed Mortgage Notes Payable
Fair Value of Financial Instruments (Details) [Line Items]
Notes payable, fair value	72.7
Significant Unobservable Inputs (Level 3) | Originated Mortgage Notes Payable
Fair Value of Financial Instruments (Details) [Line Items]
Notes payable, fair value	$ 33.2
Interest rate (in percentage)	4.60%
Significant Unobservable Inputs (Level 3) | Senior Notes Due 2027
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	$ 249.5
Significant Unobservable Inputs (Level 3) | Senior Notes Due 2026
Fair Value of Financial Instruments (Details) [Line Items]
Long-term debt, fair value	$ 196.2

Derivative and Hedging Activi58

Derivative and Hedging Activities (Assets and liabilities measured at fair value) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
In the next 12 months will be reclassified as an increase to interest expense	$ 712
Interest Rate Swap | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset	4,321	$ 875
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	0
Interest Rate Swap | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset	4,321	875
Interest Rate Swap | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Derivative [Line Items]
Derivative asset	0	0
Interest Rate Swap | Other assets | Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset	4,321	$ 875
Interest Rate Swap Maturing 1/31/2019 | Bank of Montreal | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	50,000
Interest Rate Swap Maturing 1/31/2019 | Regions Bank | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	50,000
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

Derivative and Hedging Activi59

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of gain recognized in OCI on derivatives	$ 3,665	$ 541	$ 0
Amount of loss reclassified from accumulated OCI into interest	$ 1,920	$ 2,473	$ 2,139

Commitments and Contingencies60

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended			28 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2017
Commitments and Contingencies (Details) [Line Items]
Rent expense	$ 1,500	$ 831	$ 1,200
Tax protection agreements, period (in years)				10 years
Terranomics Crossroads Associates, LP
Commitments and Contingencies (Details) [Line Items]
Ownership percentage (in percentage)			51.00%
Tax protection agreements, period (in years)	12 years
SARM Five Points LLC
Commitments and Contingencies (Details) [Line Items]
Ownership percentage (in percentage)			100.00%

Commitments and Contingencies61

Commitments and Contingencies (Details) - Future Minimum Annual Lease Payments Under Operating Leases $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 1,273
2,019	1,278
2,020	1,286
2,021	1,282
2,022	1,304
Thereafter	35,347
Total minimum lease payments	$ 41,770

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Lease Agreements | General and Administrative Expense
Related Party Transactions (Details) [Line Items]
SG&A expense with related party	$ 52	$ 46	$ 42

Quarterly Results of Operatio63

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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 72,754	$ 67,966	$ 66,640	$ 65,900	$ 63,070	$ 59,354	$ 58,671	$ 56,094	$ 273,260	$ 237,189	$ 192,699
Net income	12,113	10,127	9,197	11,251	10,652	8,215	8,638	8,925	42,688	36,430	25,092
Net income attributable to ROIC	$ 10,849	$ 9,149	$ 8,309	$ 10,170	$ 9,621	$ 7,402	$ 7,704	$ 8,027	$ 38,477	$ 32,754	$ 23,864
Earnings per share - basic and diluted (in usd per share)	$ 0.10	$ 0.08	$ 0.08	$ 0.09	$ 0.09	$ 0.07	$ 0.08	$ 0.08	$ 0.35	$ 0.31	$ 0.25

Quarterly Results of Operatio64

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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for the Operating Partnership [Line Items]
Total revenues	$ 72,754	$ 67,966	$ 66,640	$ 65,900	$ 63,070	$ 59,354	$ 58,671	$ 56,094	$ 273,260	$ 237,189	$ 192,699
Net income attributable to the Operating Partnership	$ 12,113	$ 10,127	$ 9,197	$ 11,251	$ 10,652	$ 8,215	$ 8,638	$ 8,925	$ 42,688	$ 36,430	$ 25,092
Earnings per unit - basic and diluted (in usd per share)	$ 0.10	$ 0.08	$ 0.08	$ 0.09	$ 0.09	$ 0.07	$ 0.08	$ 0.08	$ 0.35	$ 0.31	$ 0.25
Retail Opportunity Investments Partnership L.P.
Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations for the Operating Partnership [Line Items]
Total revenues	$ 72,754	$ 67,966	$ 66,640	$ 65,900	$ 63,070	$ 59,354	$ 58,671	$ 56,094	$ 273,260	$ 237,189	$ 192,699
Net income attributable to the Operating Partnership	$ 12,113	$ 10,127	$ 9,197	$ 11,251	$ 10,652	$ 8,215	$ 8,638	$ 8,925	$ 42,688	$ 36,430	$ 25,092
Earnings per unit - basic and diluted (in usd per share)	$ 0.10	$ 0.08	$ 0.08	$ 0.09	$ 0.09	$ 0.07	$ 0.08	$ 0.08	$ 0.35	$ 0.31	$ 0.25

Subsequent Events (Details)

Subsequent Events (Details) ft² in Thousands	Feb. 20, 2018$ / shares	Jul. 12, 2016shares	Dec. 31, 2017$ / sharesshares	Dec. 31, 2016ft²$ / shares	Dec. 31, 2015$ / shares
Subsequent Events (Details) [Line Items]
Equity redemption of OP Units (in shares) | shares			150,503
Common stock issued (in shares) | shares		6,555,000
Area of real estate property (in Square Feet) | ft²				596
Dividends per share (in dollars per share) | $ / shares			$ 0.75	$ 0.72	$ 0.68
Subsequent Event
Subsequent Events (Details) [Line Items]
Dividends per share (in dollars per share) | $ / shares	$ 0.1950

Schedule III - Real Estate an66

Schedule III - Real Estate and Accumulated Depreciation - Summary (Details) $ in Billions	12 Months Ended
	Dec. 31, 2017USD ($)
Schedule III - Real Estate and Accumulated Depreciation [Line Items]
SEC Schedule III, Real Estate, Federal Income Tax Basis (in Dollars)	$ 2.8
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 an67

Schedule III - Real Estate and Accumulated Depreciation (Details) - Real Estate and Accumulated Depreciation - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate Properties [Line Items]
Encumbrances	$ 106,320
Initial Cost to Company, Land	877,512
Initial Cost to Company, Buildings & Improvements	2,055,143
Cost Capitalized Subsequent to Acquisition, Land	1,285
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	175,457
Amount at Which Carried at Close of Period. Land	878,797
Amount at Which Carried at Close of Period, Buildings & Improvements	2,230,600
Total real estate investments	3,109,397	$ 2,687,018	$ 2,296,617	$ 1,785,898
Accumulated Depreciation	260,115
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	317
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,157
Amount at Which Carried at Close of Period. Land	6,664
Amount at Which Carried at Close of Period, Buildings & Improvements	12,431
Total real estate investments	19,095
Accumulated Depreciation	$ 3,004
Date of Acquisition	Dec. 22, 2009
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	3,746
Amount at Which Carried at Close of Period. Land	7,895
Amount at Which Carried at Close of Period, Buildings & Improvements	13,636
Total real estate investments	21,531
Accumulated Depreciation	$ 2,747
Date of Acquisition	Jan. 26, 2010
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	1,510
Amount at Which Carried at Close of Period. Land	1,881
Amount at Which Carried at Close of Period, Buildings & Improvements	6,305
Total real estate investments	8,186
Accumulated Depreciation	$ 1,361
Date of Acquisition	Feb. 1, 2010
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	420
Amount at Which Carried at Close of Period. Land	3,087
Amount at Which Carried at Close of Period, Buildings & Improvements	12,817
Total real estate investments	15,904
Accumulated Depreciation	$ 3,000
Date of Acquisition	Mar. 16, 2010
Norwood Shopping Center, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 3,031
Initial Cost to Company, Buildings & Improvements	11,534
Cost Capitalized Subsequent to Acquisition, Land	122
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,782
Amount at Which Carried at Close of Period. Land	3,153
Amount at Which Carried at Close of Period, Buildings & Improvements	13,316
Total real estate investments	16,469
Accumulated Depreciation	$ 3,065
Date of Acquisition	Apr. 5, 2010
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	$ 2,028
Date of Acquisition	Apr. 8, 2010
Vancouver Market Center, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 4,080
Initial Cost to Company, Buildings & Improvements	6,912
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3,097
Amount at Which Carried at Close of Period. Land	4,080
Amount at Which Carried at Close of Period, Buildings & Improvements	10,009
Total real estate investments	14,089
Accumulated Depreciation	$ 1,889
Date of Acquisition	Jun. 17, 2010
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	2,046
Amount at Which Carried at Close of Period. Land	11,678
Amount at Which Carried at Close of Period, Buildings & Improvements	29,057
Total real estate investments	40,735
Accumulated Depreciation	$ 6,753
Date of Acquisition	Jul. 14, 2010
Cascade Summit, 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	388
Amount at Which Carried at Close of Period. Land	8,853
Amount at Which Carried at Close of Period, Buildings & Improvements	8,120
Total real estate investments	16,973
Accumulated Depreciation	$ 2,245
Date of Acquisition	Aug. 20, 2010
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	648
Amount at Which Carried at Close of Period. Land	6,595
Amount at Which Carried at Close of Period, Buildings & Improvements	18,047
Total real estate investments	24,642
Accumulated Depreciation	$ 3,905
Date of Acquisition	Sep. 23, 2010
Claremont Center, 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	4,526
Amount at Which Carried at Close of Period. Land	6,158
Amount at Which Carried at Close of Period, Buildings & Improvements	5,545
Total real estate investments	11,703
Accumulated Depreciation	$ 2,245
Date of Acquisition	Sep. 23, 2010
Shops At 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	574
Amount at Which Carried at Close of Period. Land	3,747
Amount at Which Carried at Close of Period, Buildings & Improvements	12,158
Total real estate investments	15,905
Accumulated Depreciation	$ 3,139
Date of Acquisition	Sep. 30, 2010
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	727
Amount at Which Carried at Close of Period. Land	5,917
Amount at Which Carried at Close of Period, Buildings & Improvements	28,025
Total real estate investments	33,942
Accumulated Depreciation	$ 5,806
Date of Acquisition	Dec. 16, 2010
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	5,726
Amount at Which Carried at Close of Period. Land	3,706
Amount at Which Carried at Close of Period, Buildings & Improvements	14,053
Total real estate investments	17,759
Accumulated Depreciation	$ 3,318
Date of Acquisition	Dec. 22, 2010
Halsey Crossing, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Buildings & Improvements	$ 7,773
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	7,459
Amount at Which Carried at Close of Period, Buildings & Improvements	15,232
Total real estate investments	15,232
Accumulated Depreciation	$ 2,184
Date of Acquisition	Dec. 22, 2010
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	1,991
Amount at Which Carried at Close of Period. Land	13,429
Amount at Which Carried at Close of Period, Buildings & Improvements	24,242
Total real estate investments	37,671
Accumulated Depreciation	$ 5,429
Date of Acquisition	Jan. 3, 2011
Pinole Vista, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 12,894
Initial Cost to Company, Buildings & Improvements	30,670
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,659
Amount at Which Carried at Close of Period. Land	12,894
Amount at Which Carried at Close of Period, Buildings & Improvements	33,329
Total real estate investments	46,223
Accumulated Depreciation	$ 5,274
Date of Acquisition	Jan. 6, 2011
Desert Spring 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	5,953
Amount at Which Carried at Close of Period. Land	8,960
Amount at Which Carried at Close of Period, Buildings & Improvements	24,714
Total real estate investments	33,674
Accumulated Depreciation	$ 4,820
Date of Acquisition	Feb. 17, 2011
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	10,646
Amount at Which Carried at Close of Period. Land	4,084
Amount at Which Carried at Close of Period, Buildings & Improvements	27,479
Total real estate investments	31,563
Accumulated Depreciation	$ 6,435
Date of Acquisition	Feb. 17, 2011
Morada Ranch, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 2,504
Initial Cost to Company, Buildings & Improvements	19,547
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	506
Amount at Which Carried at Close of Period. Land	2,504
Amount at Which Carried at Close of Period, Buildings & Improvements	20,053
Total real estate investments	22,557
Accumulated Depreciation	$ 4,204
Date of Acquisition	May 20, 2011
Renaissance, 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	639
Amount at Which Carried at Close of Period. Land	8,640
Amount at Which Carried at Close of Period, Buildings & Improvements	14,487
Total real estate investments	23,127
Accumulated Depreciation	$ 2,710
Date of Acquisition	Aug. 3, 2011
Country Club Gate, 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	1,194
Amount at Which Carried at Close of Period. Land	6,487
Amount at Which Carried at Close of Period, Buildings & Improvements	18,535
Total real estate investments	25,022
Accumulated Depreciation	$ 3,828
Date of Acquisition	Jul. 8, 2011
Canyon Park, 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	8,947
Amount at Which Carried at Close of Period. Land	9,352
Amount at Which Carried at Close of Period, Buildings & Improvements	24,863
Total real estate investments	34,215
Accumulated Depreciation	$ 4,395
Date of Acquisition	Jul. 29, 2011
Hawks Prairie, 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	2,142
Amount at Which Carried at Close of Period. Land	5,334
Amount at Which Carried at Close of Period, Buildings & Improvements	22,836
Total real estate investments	28,170
Accumulated Depreciation	$ 3,970
Date of Acquisition	Sep. 8, 2011
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	4,680
Amount at Which Carried at Close of Period. Land	5,693
Amount at Which Carried at Close of Period, Buildings & Improvements	25,546
Total real estate investments	31,239
Accumulated Depreciation	$ 5,271
Date of Acquisition	Sep. 30, 2011
Round Hill Square, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 6,358
Initial Cost to Company, Buildings & Improvements	17,734
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	796
Amount at Which Carried at Close of Period. Land	6,358
Amount at Which Carried at Close of Period, Buildings & Improvements	18,530
Total real estate investments	24,888
Accumulated Depreciation	$ 3,799
Date of Acquisition	Aug. 23, 2011
Hillsboro, OR
Real Estate Properties [Line Items]
Initial Cost to Company, Buildings & Improvements	$ 17,553
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	780
Amount at Which Carried at Close of Period, Buildings & Improvements	18,333
Total real estate investments	18,333
Accumulated Depreciation	$ 3,780
Date of Acquisition	Nov. 23, 2011
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	(4)
Amount at Which Carried at Close of Period. Land	6,242
Amount at Which Carried at Close of Period, Buildings & Improvements	23,458
Total real estate investments	29,700
Accumulated Depreciation	$ 4,033
Date of Acquisition	Feb. 16, 2012
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	2,947
Amount at Which Carried at Close of Period. Land	7,407
Amount at Which Carried at Close of Period, Buildings & Improvements	10,700
Total real estate investments	18,107
Accumulated Depreciation	$ 2,553
Date of Acquisition	Mar. 28, 2012
Green Valley, 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	631
Amount at Which Carried at Close of Period. Land	1,685
Amount at Which Carried at Close of Period, Buildings & Improvements	9,630
Total real estate investments	11,315
Accumulated Depreciation	$ 1,963
Date of Acquisition	Apr. 2, 2012
Aurora Square, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 3,002
Initial Cost to Company, Buildings & Improvements	1,693
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	(22)
Amount at Which Carried at Close of Period. Land	3,002
Amount at Which Carried at Close of Period, Buildings & Improvements	1,671
Total real estate investments	4,673
Accumulated Depreciation	$ 458
Date of Acquisition	May 3, 2012
Marlin Cove, 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	1,955
Amount at Which Carried at Close of Period. Land	8,815
Amount at Which Carried at Close of Period, Buildings & Improvements	8,752
Total real estate investments	17,567
Accumulated Depreciation	$ 1,892
Date of Acquisition	May 4, 2012
Seabridge, 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	2,831
Amount at Which Carried at Close of Period. Land	5,098
Amount at Which Carried at Close of Period, Buildings & Improvements	19,995
Total real estate investments	25,093
Accumulated Depreciation	$ 3,373
Date of Acquisition	May 31, 2012
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	1,335
Amount at Which Carried at Close of Period. Land	5,329
Amount at Which Carried at Close of Period, Buildings & Improvements	5,747
Total real estate investments	11,076
Accumulated Depreciation	$ 829
Date of Acquisition	Jul. 24, 2012
Glendora, 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	166
Amount at Which Carried at Close of Period. Land	5,847
Amount at Which Carried at Close of Period, Buildings & Improvements	8,924
Total real estate investments	14,771
Accumulated Depreciation	$ 1,766
Date of Acquisition	Aug. 1, 2012
Wilsonville, WA
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	559
Amount at Which Carried at Close of Period. Land	4,181
Amount at Which Carried at Close of Period, Buildings & Improvements	15,953
Total real estate investments	20,134
Accumulated Depreciation	$ 2,639
Date of Acquisition	Aug. 1, 2012
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	1,326
Amount at Which Carried at Close of Period. Land	5,454
Amount at Which Carried at Close of Period, Buildings & Improvements	16,183
Total real estate investments	21,637
Accumulated Depreciation	$ 2,840
Date of Acquisition	Oct. 5, 2012
Santa Theresa, CA
Real Estate Properties [Line Items]
Encumbrances	$ 10,138
Initial Cost to Company, Land	14,965
Initial Cost to Company, Buildings & Improvements	17,162
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	4,855
Amount at Which Carried at Close of Period. Land	14,965
Amount at Which Carried at Close of Period, Buildings & Improvements	22,017
Total real estate investments	36,982
Accumulated Depreciation	$ 3,889
Date of Acquisition	Nov. 8, 2012
Cypress 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	80
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2,023
Amount at Which Carried at Close of Period. Land	15,560
Amount at Which Carried at Close of Period, Buildings & Improvements	13,842
Total real estate investments	29,402
Accumulated Depreciation	$ 2,615
Date of Acquisition	Dec. 7, 2012
Redondo Beach, 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	36
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	166
Amount at Which Carried at Close of Period. Land	16,278
Amount at Which Carried at Close of Period, Buildings & Improvements	13,791
Total real estate investments	30,069
Accumulated Depreciation	$ 2,196
Date of Acquisition	Dec. 28, 2012
Harbor Place, 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	342
Amount at Which Carried at Close of Period. Land	16,506
Amount at Which Carried at Close of Period, Buildings & Improvements	10,869
Total real estate investments	27,375
Accumulated Depreciation	$ 1,653
Date of Acquisition	Dec. 28, 2012
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	3,501
Amount at Which Carried at Close of Period. Land	9,540
Amount at Which Carried at Close of Period, Buildings & Improvements	20,296
Total real estate investments	29,836
Accumulated Depreciation	$ 3,736
Date of Acquisition	Feb. 1, 2013
Bernardo Heights, 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	701
Amount at Which Carried at Close of Period. Land	3,192
Amount at Which Carried at Close of Period, Buildings & Improvements	9,641
Total real estate investments	12,833
Accumulated Depreciation	$ 1,521
Date of Acquisition	Feb. 6, 2013
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	2,874
Amount at Which Carried at Close of Period. Land	7,941
Amount at Which Carried at Close of Period, Buildings & Improvements	27,533
Total real estate investments	35,474
Accumulated Depreciation	$ 4,670
Date of Acquisition	Apr. 15, 2013
Diamond Hills, 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	223
Amount at Which Carried at Close of Period. Land	15,458
Amount at Which Carried at Close of Period, Buildings & Improvements	29,576
Total real estate investments	45,034
Accumulated Depreciation	$ 4,443
Date of Acquisition	Apr. 22, 2013
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	389
Amount at Which Carried at Close of Period. Land	3,673
Amount at Which Carried at Close of Period, Buildings & Improvements	13,848
Total real estate investments	17,521
Accumulated Depreciation	$ 2,067
Date of Acquisition	Jun. 27, 2013
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	413
Amount at Which Carried at Close of Period. Land	10,383
Amount at Which Carried at Close of Period, Buildings & Improvements	29,690
Total real estate investments	40,073
Accumulated Depreciation	$ 4,183
Date of Acquisition	Jun. 27, 2013
Robinwood, CA
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	12
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	887
Amount at Which Carried at Close of Period. Land	4,009
Amount at Which Carried at Close of Period, Buildings & Improvements	12,204
Total real estate investments	16,213
Accumulated Depreciation	$ 1,810
Date of Acquisition	Aug. 23, 2013
Five 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	3,593
Amount at Which Carried at Close of Period. Land	17,920
Amount at Which Carried at Close of Period, Buildings & Improvements	40,558
Total real estate investments	58,478
Accumulated Depreciation	$ 5,027
Date of Acquisition	Sep. 27, 2013
Crossroads Shopping Center, CA
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	17,965
Amount at Which Carried at Close of Period. Land	68,366
Amount at Which Carried at Close of Period, Buildings & Improvements	85,721
Total real estate investments	154,087
Accumulated Depreciation	$ 11,165
Date of Acquisition	Sep. 27, 2013
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	1,900
Amount at Which Carried at Close of Period. Land	14,730
Amount at Which Carried at Close of Period, Buildings & Improvements	21,114
Total real estate investments	35,844
Accumulated Depreciation	$ 2,795
Date of Acquisition	Nov. 1, 2013
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	1,778
Amount at Which Carried at Close of Period. Land	9,986
Amount at Which Carried at Close of Period, Buildings & Improvements	28,357
Total real estate investments	38,343
Accumulated Depreciation	$ 4,140
Date of Acquisition	Nov. 26, 2013
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	400
Amount at Which Carried at Close of Period. Land	10,351
Amount at Which Carried at Close of Period, Buildings & Improvements	25,219
Total real estate investments	35,570
Accumulated Depreciation	$ 3,028
Date of Acquisition	Dec. 13, 2013
Tigard Marketplace, CA
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	513
Amount at Which Carried at Close of Period. Land	13,587
Amount at Which Carried at Close of Period, Buildings & Improvements	10,116
Total real estate investments	23,703
Accumulated Depreciation	$ 1,670
Date of Acquisition	Feb. 18, 2014
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	185
Amount at Which Carried at Close of Period. Land	14,807
Amount at Which Carried at Close of Period, Buildings & Improvements	29,661
Total real estate investments	44,468
Accumulated Depreciation	$ 3,968
Date of Acquisition	Feb. 28, 2014
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	543
Amount at Which Carried at Close of Period. Land	13,593
Amount at Which Carried at Close of Period, Buildings & Improvements	18,276
Total real estate investments	31,869
Accumulated Depreciation	$ 1,927
Date of Acquisition	Apr. 30, 2014
Aurora Square II, WA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 7,323
Initial Cost to Company, Buildings & Improvements	11,644
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	353
Amount at Which Carried at Close of Period. Land	7,323
Amount at Which Carried at Close of Period, Buildings & Improvements	11,997
Total real estate investments	19,320
Accumulated Depreciation	$ 1,271
Date of Acquisition	May 22, 2014
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	7,215
Amount at Which Carried at Close of Period. Land	21,315
Amount at Which Carried at Close of Period, Buildings & Improvements	193,412
Total real estate investments	214,727
Accumulated Depreciation	$ 20,913
Date of Acquisition	Jun. 13, 2014
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	1,568
Amount at Which Carried at Close of Period. Land	7,063
Amount at Which Carried at Close of Period, Buildings & Improvements	21,262
Total real estate investments	28,325
Accumulated Depreciation	$ 2,670
Date of Acquisition	Dec. 4, 2014
Mission Foothill Marketplace, CA
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 11,415
Initial Cost to Company, Buildings & Improvements	17,783
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	118
Amount at Which Carried at Close of Period. Land	11,415
Amount at Which Carried at Close of Period, Buildings & Improvements	17,901
Total real estate investments	29,316
Accumulated Depreciation	$ 1,343
Date of Acquisition	Dec. 4, 2014
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	456
Amount at Which Carried at Close of Period. Land	10,334
Amount at Which Carried at Close of Period, Buildings & Improvements	27,557
Total real estate investments	37,891
Accumulated Depreciation	$ 2,749
Date of Acquisition	Dec. 11, 2014
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	624
Amount at Which Carried at Close of Period. Land	8,527
Amount at Which Carried at Close of Period, Buildings & Improvements	38,688
Total real estate investments	47,215
Accumulated Depreciation	$ 3,598
Date of Acquisition	Jan. 6, 2016
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	1,415
Amount at Which Carried at Close of Period. Land	9,825
Amount at Which Carried at Close of Period, Buildings & Improvements	28,050
Total real estate investments	37,875
Accumulated Depreciation	$ 2,759
Date of Acquisition	Jan. 6, 2015
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	1,729
Amount at Which Carried at Close of Period. Land	10,018
Amount at Which Carried at Close of Period, Buildings & Improvements	11,491
Total real estate investments	21,509
Accumulated Depreciation	$ 1,182
Date of Acquisition	Jan. 7, 2015
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	933
Amount at Which Carried at Close of Period. Land	6,886
Amount at Which Carried at Close of Period, Buildings & Improvements	25,491
Total real estate investments	32,377
Accumulated Depreciation	$ 1,933
Date of Acquisition	Jul. 1, 2015
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	108
Amount at Which Carried at Close of Period. Land	9,844
Amount at Which Carried at Close of Period, Buildings & Improvements	10,951
Total real estate investments	20,795
Accumulated Depreciation	$ 826
Date of Acquisition	Jul. 28, 2015
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	3,313
Amount at Which Carried at Close of Period. Land	4,428
Amount at Which Carried at Close of Period, Buildings & Improvements	16,637
Total real estate investments	21,065
Accumulated Depreciation	$ 1,143
Date of Acquisition	Jul. 28, 2015
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	2,858
Amount at Which Carried at Close of Period. Land	16,275
Amount at Which Carried at Close of Period, Buildings & Improvements	31,166
Total real estate investments	47,441
Accumulated Depreciation	$ 2,130
Date of Acquisition	Sep. 1, 2015
Johnson Creek, 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	1,345
Amount at Which Carried at Close of Period. Land	9,009
Amount at Which Carried at Close of Period, Buildings & Improvements	23,879
Total real estate investments	32,888
Accumulated Depreciation	$ 1,761
Date of Acquisition	Nov. 9, 2015
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, Buildings & Improvements	459
Amount at Which Carried at Close of Period. Land	8,187
Amount at Which Carried at Close of Period, Buildings & Improvements	40,113
Total real estate investments	48,300
Accumulated Depreciation	$ 2,289
Date of Acquisition	Dec. 4, 2015
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	6,812
Amount at Which Carried at Close of Period. Land	10,488
Amount at Which Carried at Close of Period, Buildings & Improvements	45,931
Total real estate investments	56,419
Accumulated Depreciation	$ 2,464
Date of Acquisition	Dec. 10, 2015
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	459
Amount at Which Carried at Close of Period. Land	9,926
Amount at Which Carried at Close of Period, Buildings & Improvements	31,874
Total real estate investments	41,800
Accumulated Depreciation	$ 2,136
Date of Acquisition	Dec. 21, 2015
Warner Plaza Shopping Center, 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	7,429
Amount at Which Carried at Close of Period. Land	16,104
Amount at Which Carried at Close of Period, Buildings & Improvements	67,617
Total real estate investments	83,721
Accumulated Depreciation	$ 3,770
Date of Acquisition	Dec. 31, 2015
Magnolia Shopping Center
Real Estate Properties [Line Items]
Encumbrances	$ 8,951
Initial Cost to Company, Land	12,501
Initial Cost to Company, Buildings & Improvements	27,040
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,084
Amount at Which Carried at Close of Period. Land	12,501
Amount at Which Carried at Close of Period, Buildings & Improvements	28,124
Total real estate investments	40,625
Accumulated Depreciation	$ 1,596
Date of Acquisition	Mar. 10, 2016
Casitas Plaza Shopping Center
Real Estate Properties [Line Items]
Encumbrances	$ 7,307
Initial Cost to Company, Land	9,905
Initial Cost to Company, Buildings & Improvements	18,731
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	297
Amount at Which Carried at Close of Period. Land	9,905
Amount at Which Carried at Close of Period, Buildings & Improvements	19,028
Total real estate investments	28,933
Accumulated Depreciation	$ 1,096
Date of Acquisition	Mar. 10, 2016
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	529
Amount at Which Carried at Close of Period. Land	10,040
Amount at Which Carried at Close of Period, Buildings & Improvements	48,891
Total real estate investments	58,931
Accumulated Depreciation	$ 2,408
Date of Acquisition	Apr. 28, 2016
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	(6)
Amount at Which Carried at Close of Period. Land	31,522
Amount at Which Carried at Close of Period, Buildings & Improvements	95,910
Total real estate investments	127,432
Accumulated Depreciation	$ 4,235
Date of Acquisition	Jun. 1, 2016
Monterey Center
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	2
Amount at Which Carried at Close of Period. Land	1,073
Amount at Which Carried at Close of Period, Buildings & Improvements	10,611
Total real estate investments	11,684
Accumulated Depreciation	$ 486
Date of Acquisition	Jul. 14, 2016
Rose City Center
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	0
Amount at Which Carried at Close of Period. Land	3,637
Amount at Which Carried at Close of Period, Buildings & Improvements	10,301
Total real estate investments	13,938
Accumulated Depreciation	$ 467
Date of Acquisition	Sep. 15, 2016
Trader Joe’s at 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	20
Amount at Which Carried at Close of Period. Land	9,726
Amount at Which Carried at Close of Period, Buildings & Improvements	18,319
Total real estate investments	28,045
Accumulated Depreciation	$ 702
Date of Acquisition	Oct. 3, 2016
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	357
Amount at Which Carried at Close of Period. Land	11,534
Amount at Which Carried at Close of Period, Buildings & Improvements	21,057
Total real estate investments	32,591
Accumulated Depreciation	$ 840
Date of Acquisition	Oct. 17, 2016
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	1,393
Amount at Which Carried at Close of Period. Land	5,579
Amount at Which Carried at Close of Period, Buildings & Improvements	5,308
Total real estate investments	10,887
Accumulated Depreciation	$ 138
Date of Acquisition	Dec. 6, 2016
PCC Community Markets Plaza
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	$ 207
Date of Acquisition	Jan. 25, 2017
The Terraces
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	355
Amount at Which Carried at Close of Period. Land	18,378
Amount at Which Carried at Close of Period, Buildings & Improvements	37,458
Total real estate investments	55,836
Accumulated Depreciation	$ 888
Date of Acquisition	Mar. 17, 2017
Santa Rosa Southside Shopping Center
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 5,593
Initial Cost to Company, Buildings & Improvements	24,453
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	1,279
Amount at Which Carried at Close of Period. Land	5,593
Amount at Which Carried at Close of Period, Buildings & Improvements	25,732
Total real estate investments	31,325
Accumulated Depreciation	$ 552
Date of Acquisition	Mar. 24, 2017
Division Center
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	242
Amount at Which Carried at Close of Period. Land	6,917
Amount at Which Carried at Close of Period, Buildings & Improvements	26,340
Total real estate investments	33,257
Accumulated Depreciation	$ 610
Date of Acquisition	Apr. 5, 2017
Highland Hill Shopping Center
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, Buildings & Improvements	293
Amount at Which Carried at Close of Period. Land	10,511
Amount at Which Carried at Close of Period, Buildings & Improvements	38,118
Total real estate investments	48,629
Accumulated Depreciation	$ 796
Date of Acquisition	May 9, 2017
Monta Loma Plaza
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 18,223
Initial Cost to Company, Buildings & Improvements	11,113
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	3
Amount at Which Carried at Close of Period. Land	18,223
Amount at Which Carried at Close of Period, Buildings & Improvements	11,116
Total real estate investments	29,339
Accumulated Depreciation	$ 86
Date of Acquisition	Sep. 19, 2017
Fullerton Crossroads
Real Estate Properties [Line Items]
Encumbrances	$ 26,000
Initial Cost to Company, Land	28,164
Initial Cost to Company, Buildings & Improvements	44,870
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	0
Amount at Which Carried at Close of Period. Land	28,164
Amount at Which Carried at Close of Period, Buildings & Improvements	44,870
Total real estate investments	73,034
Accumulated Depreciation	$ 351
Date of Acquisition	Oct. 11, 2017
Riverstone Marketplace
Real Estate Properties [Line Items]
Encumbrances	$ 18,424
Initial Cost to Company, Land	5,113
Initial Cost to Company, Buildings & Improvements	27,594
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	5
Amount at Which Carried at Close of Period. Land	5,113
Amount at Which Carried at Close of Period, Buildings & Improvements	27,599
Total real estate investments	32,712
Accumulated Depreciation	$ 210
Date of Acquisition	Oct. 11, 2017
North Lynnwood Shopping Center
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 4,923
Initial Cost to Company, Buildings & Improvements	10,335
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	2
Amount at Which Carried at Close of Period. Land	4,923
Amount at Which Carried at Close of Period, Buildings & Improvements	10,337
Total real estate investments	15,260
Accumulated Depreciation	$ 57
Date of Acquisition	Oct. 19, 2017
The Village at Nellie Gail Ranch
Real Estate Properties [Line Items]
Initial Cost to Company, Land	$ 9,222
Initial Cost to Company, Buildings & Improvements	36,889
Cost Capitalized Subsequent to Acquisition, Buildings & Improvements	97
Amount at Which Carried at Close of Period. Land	9,222
Amount at Which Carried at Close of Period, Buildings & Improvements	36,986
Total real estate investments	46,208
Accumulated Depreciation	$ 0
Date of Acquisition	Nov. 30, 2017

Schedule III - Real Estate an68

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, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance	$ 2,687,018	$ 2,296,617	$ 1,785,898
Property improvements during the year	54,481	41,359	28,104
Properties acquired during the year	374,004	354,035	485,853
Assets written off during the year	(6,106)	(4,993)	(3,238)
Balance	$ 3,109,397	$ 2,687,018	$ 2,296,617

Schedule III - Real Estate an69

Schedule III - Real Estate and Accumulated Depreciation (Details) - Reconciliation of Accumulated Depreciation - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance	$ 193,021	$ 134,311	$ 88,173
Depreciation expenses	72,725	63,872	49,619
Property assets fully depreciated and written off	(5,631)	(5,162)	(3,481)
Balance	$ 260,115	$ 193,021	$ 134,311