Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Base rents	$ 183,330	$ 148,622	$ 119,842
Recoveries from tenants	51,454	40,562	32,945
Other income	2,405	3,515	3,077
Total revenues	237,189	192,699	155,864
Operating expenses
Property operating	32,201	28,475	25,036
Property taxes	25,058	19,690	15,953
Depreciation and amortization	88,359	70,957	58,435
General and administrative expenses	13,120	12,650	11,200
Acquisition transaction costs	824	965	961
Other expense	456	627	505
Total operating expenses	160,018	133,364	112,090
Operating income	77,171	59,335	43,774
Non-operating income (expenses)
Interest expense and other finance expenses	(40,741)	(34,243)	(27,593)
Gain on sale of real estate	0	0	4,869
Net income	36,430	25,092	21,050
Net income attributable to non-controlling interests	(3,676)	(1,228)	(749)
Net Income Attributable to Retail Opportunity Investments Corp.	$ 32,754	$ 23,864	$ 20,301
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.31	$ 0.25	$ 0.24
Dividends per common share or unit (in usd per share)	$ 0.72	$ 0.68	$ 0.64
Comprehensive income:
Net income	$ 36,430	$ 25,092	$ 21,050
Unrealized swap derivative gain (loss) arising during the period	541	0	(3,132)
Reclassification adjustment for amortization of interest expense included in net income	2,473	2,139	3,219
Other comprehensive income	3,014	2,139	87
Comprehensive income	39,444	27,231	21,137
Comprehensive income attributable to non-controlling interests	(3,676)	(1,228)	(749)
Comprehensive income attributable to Retail Opportunity Investments Corp	35,768	26,003	20,388
Retail Opportunity Investments Partnership L.P.
Revenues
Base rents	183,330	148,622	119,842
Recoveries from tenants	51,454	40,562	32,945
Other income	2,405	3,515	3,077
Total revenues	237,189	192,699	155,864
Operating expenses
Property operating	32,201	28,475	25,036
Property taxes	25,058	19,690	15,953
Depreciation and amortization	88,359	70,957	58,435
General and administrative expenses	13,120	12,650	11,200
Acquisition transaction costs	824	965	961
Other expense	456	627	505
Total operating expenses	160,018	133,364	112,090
Operating income	77,171	59,335	43,774
Non-operating income (expenses)
Interest expense and other finance expenses	(40,741)	(34,243)	(27,593)
Gain on sale of real estate	0	0	4,869
Net income	$ 36,430	$ 25,092	$ 21,050
Earnings per share/unit - basic and diluted (in usd per share)	$ 0.31	$ 0.25	$ 0.24
Dividends per common share or unit (in usd per share)	$ 0.72	$ 0.68	$ 0.64
Comprehensive income:
Net income	$ 36,430	$ 25,092	$ 21,050
Unrealized swap derivative gain (loss) arising during the period	541	0	(3,132)
Reclassification adjustment for amortization of interest expense included in net income	2,473	2,139	3,219
Other comprehensive income	3,014	2,139	87
Comprehensive income attributable to Retail Opportunity Investments Corp	$ 39,444	$ 27,231	$ 21,137