v2.3.0.9
DOCUMENT AND ENTITY INFORMATION
3 Months Ended
Mar. 31, 2012
May 14, 2012
Entity Registrant Name POTOMAC BANCSHARES INC  
Entity Central Index Key 0000925173  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Trading Symbol ptbs  
Entity Common Stock, Shares Outstanding   3,390,178
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2012
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2012