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Variable Interest Entities (VIE) (Narrative) (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2009
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Variable Interest Entity, Not Primary Beneficiary [Member]
Dec. 31, 2009
Variable Interest Entity, Not Primary Beneficiary [Member]
Mar. 31, 2014
Variable Interest Entity, Not Primary Beneficiary [Member]
Junior Subordinated Debt [Member]
Variable Interest Entity [Line Items]              
Long-term Debt     $ 182,656,000 $ 182,672,000 $ 41,700,000   $ 5,000,000
Equity Method Investments         1,300,000    
Payments to Acquire Businesses and Interest in Affiliates 6,100,000 6,100,000          
Ownership in Liberty Mews Limited Partnership           99.99%  
VIE financing           10,600,000  
VIE purpose         formed for the purpose of acquiring, developing and operating low-income housing units in Garrett County, Maryland.    
Construction and Development Costs           10,600,000  
Partnership total assets         9,700,000    
Federal investment tax credits $ 8,400,000            
Federal investment tax credit duration 10 years