Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings per common share - Basic
Net income attributable to OBCI	$ 410,633	$ 172,616	$ 634,231	$ 521,668
Weighted average number of common shares outstanding	8,817,846	8,493,559	8,754,313	8,446,235
Earnings per common share - Basic	$ 0.05	$ 0.02	$ 0.07	$ 0.06
Earnings per common share - Diluted
Net income attributable to OBCI	$ 410,633	$ 172,616	$ 634,231	$ 521,668
Weighted average number of common shares outstanding	8,817,846	8,493,559	8,754,313	8,446,235
Dilutive effect of employee stock-based awards	83,225	292,461	127,925	287,970
Weighted average number of common shares outstanding - assuming dilution	8,901,071	8,786,020	8,882,238	8,734,205
Earnings per common share - Diluted	$ 0.05	$ 0.02	$ 0.07	$ 0.06