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Nature of Banking Activities and Significant Accounting Policies (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Principles of Consolidation [Abstract]      
Ownership interest in Southern Trust Mortgage (in hundredths) 62.40%    
Equity investment in MFC Capital Trust II $ 155,000 $ 155,000  
Cash and Cash Equivalents [Abstract]      
Maturity period of federal funds sold and purchase 1 day    
Share-Based Employee Compensation Plan [Abstract]      
Share-based compensation $ 440,000 $ 471,000 $ 158,000
Rate Lock Commitments [Member]
     
Derivative [Line Items]      
Period between issuance of a loan commitment and closing and sale of the loan, minimum 30 days    
Period between issuance of a loan commitment and closing and sale of the loan, maximum 120 days    
Customer Relationships [Member]
     
Goodwill and Intangible Assets [Abstract]      
Expected life of intangible assets 15 years    
Buildings and Improvements [Member] | Minimum [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 10 years    
Buildings and Improvements [Member] | Maximum [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 40 years    
Furniture, Fixtures, and Equipment [Member] | Minimum [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 3 years    
Furniture, Fixtures, and Equipment [Member] | Maximum [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 15 years