Consolidated Statement Of Operations And Comprehensive Income (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues
Base rents	$ 19,349,561	$ 13,341,420
Recoveries from tenants	4,830,829	3,104,042
Mortgage interest	204,059	202,222
Total revenues	24,384,449	16,647,684
Operating expenses
Property operating	4,158,881	2,969,348
Property taxes	2,315,178	1,599,159
Depreciation and amortization	8,881,130	6,649,818
General & Administrative Expenses	2,736,581	2,419,838
Acquisition transaction costs	408,836	122,843
Total operating expenses	18,500,606	13,761,006
Operating income	5,883,843	2,886,678
Non-operating income (expenses)
Interest expense and other finance expenses	(3,825,151)	(2,293,748)
Equity in earnings from unconsolidated joint ventures	231,194	524,329
Interest income		10,145
Net Income Attributable to Retail Opportunity Investments Corp.	2,289,886	1,127,404
Basic and diluted per share: (in Dollars per share)	$ 0.04	$ 0.02
Dividends per common share (in Dollars per share)	$ 0.15	$ 0.12
Unrealized gain on swap derivative
Unrealized swap derivative gain arising during the period	322,254	394,464
Reclassification adjustment for amortization of interest expense included in net income	1,197,684	572,076
Unrealized gain on swap derivative	1,519,938	966,540
Total other comprehensive income	1,519,938	966,540
Total Comprehensive income	$ 3,809,824	$ 2,093,944