Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Base rents	$ 37,654,000	$ 31,558,000	$ 108,884,000	$ 87,230,000
Recoveries from tenants	10,279,000	8,143,000	29,809,000	24,137,000
Other income	2,144,000	1,155,000	2,721,000	2,754,000
Total revenues	50,077,000	40,856,000	141,414,000	114,121,000
Operating expenses
Property operating	7,285,000	5,865,000	21,064,000	18,062,000
Property taxes	4,933,000	4,160,000	14,351,000	11,566,000
Depreciation and amortization	18,059,000	15,365,000	52,567,000	42,986,000
General and administrative expenses	3,092,000	2,987,000	9,387,000	8,324,000
Acquisition transaction costs	91,000	125,000	507,000	654,000
Other expenses	254,000	58,000	507,000	405,000
Total operating expenses	33,714,000	28,560,000	98,383,000	81,997,000
Operating income	16,363,000	12,296,000	43,031,000	32,124,000
Non-operating income (expenses)
Interest expense and other finance expenses	(8,526,000)	(6,865,000)	(25,407,000)	(20,695,000)
Gain on sale of real estate		1,550,000		4,869,000
Net Income	7,837,000	6,981,000	17,624,000	16,298,000
Unrealized gain (loss) on swap derivative
Unrealized swap derivative gain (loss) arising during the period		135,000		(2,792,000)
Reclassification adjustment for amortization of interest expense included in net income	535,000	869,000	1,604,000	2,641,000
Other comprehensive income (loss)	535,000	1,004,000	1,604,000	(151,000)
Comprehensive income	8,372,000	7,985,000	19,228,000	16,147,000
Comprehensive income attributable to non-controlling interests	(295,000)	(233,000)	(681,000)	(584,000)
Net income attributable to non-controlling interests	(295,000)	(233,000)	(681,000)	(584,000)
Net Income Attributable to Retail Opportunity Investments Corp.	7,542,000	6,748,000	16,943,000	15,714,000
Comprehensive income attributable to Retail Opportunity Investments Corp.	$ 8,077,000	$ 7,752,000	$ 18,547,000	$ 15,563,000
Net earnings per share – basic: (in Dollars per share)	$ 0.08	$ 0.07	$ 0.18	$ 0.19
Net earnings per share – diluted: (in Dollars per share)	0.08	0.07	0.18	0.19
Dividends per common share (in Dollars per share)	$ 0.17	$ 0.16	$ 0.51	$ 0.48
Retail Opportunity Investments Partnership L.P. [Member]
Revenues
Base rents	$ 37,654,000	$ 31,558,000	$ 108,884,000	$ 87,230,000
Recoveries from tenants	10,279,000	8,143,000	29,809,000	24,137,000
Other income	2,144,000	1,155,000	2,721,000	2,754,000
Total revenues	50,077,000	40,856,000	141,414,000	114,121,000
Operating expenses
Property operating	7,285,000	5,865,000	21,064,000	18,062,000
Property taxes	4,933,000	4,160,000	14,351,000	11,566,000
Depreciation and amortization	18,059,000	15,365,000	52,567,000	42,986,000
General and administrative expenses	3,092,000	2,987,000	9,387,000	8,324,000
Acquisition transaction costs	91,000	125,000	507,000	654,000
Other expenses	254,000	58,000	507,000	405,000
Total operating expenses	33,714,000	28,560,000	98,383,000	81,997,000
Operating income	$ 16,363,000	$ 12,296,000	$ 43,031,000	$ 32,124,000
Net earnings per unit – basic and diluted: (in Dollars per share)	$ 0.08	$ 0.07	$ 0.18	$ 0.19
Non-operating income (expenses)
Interest expense and other finance expenses	$ (8,526,000)	$ (6,865,000)	$ (25,407,000)	$ (20,695,000)
Gain on sale of real estate		1,550,000		4,869,000
Net Income	7,837,000	6,981,000	17,624,000	16,298,000
Unrealized gain (loss) on swap derivative
Unrealized swap derivative gain (loss) arising during the period		135,000		(2,792,000)
Reclassification adjustment for amortization of interest expense included in net income	535,000	869,000	1,604,000	2,641,000
Other comprehensive income (loss)	535,000	1,004,000	1,604,000	(151,000)
Comprehensive income	$ 8,372,000	$ 7,985,000	$ 19,228,000	$ 16,147,000
Dividends per common share (in Dollars per share)	$ 0.17	$ 0.16	$ 0.51	$ 0.48