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Variable Interest Entities (VIE) (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Variable Interest Entity [Line Items]    
Long-term Debt $ 182,672,000 $ 182,735,000
Variable Interest Entity, Not Primary Beneficiary [Member]
    
Variable Interest Entity [Line Items]    
Long-term Debt 41,700,000  
Equity Method Investments 1,300,000  
Ownership in Liberty Mews Limited Partnership 99.99%  
VIE financing 10,600,000  
VIE purpose purchase land and construct thereon a 36-unit low income housing rental complex  
Construction and Development Costs 10,600,000  
Partnership total assets 9,700,000 10,000,000
Variable Interest Entity, Not Primary Beneficiary [Member] | Junior Subordinated Debt [Member]
    
Variable Interest Entity [Line Items]    
Long-term Debt 5,000,000  
Subsidiaries [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
    
Variable Interest Entity [Line Items]    
VIE financing 6,100,000  
Federal investment tax credits $ 8,400,000  
Federal investment tax credit duration 10 years