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Notes Payable and Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 21, 2007
Dec. 15, 2005
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]        
Long-term debt     $ 17,515 $ 18,715
Unsecured Debt [Member] | Promissory Note [Member]        
Debt Instrument [Line Items]        
Long-term debt     $ 5,143 5,143
Payment terms     Annual installment payments.  
Unsecured Debt [Member] | Trust Preferred Security Offering, 2005 [Member]        
Debt Instrument [Line Items]        
Long-term debt     $ 9,279 9,279
Fixed interest rate   8.83%    
Payment terms     Interest payments due quarterly.  
Unsecured Debt [Member] | Trust Preferred Security Offering, 2007 [Member]        
Debt Instrument [Line Items]        
Long-term debt     $ 3,093 3,093
Payment terms     Interest payments due quarterly.  
Line of Credit [Member] | Unsecured Debt [Member]        
Debt Instrument [Line Items]        
Amount outstanding     $ 0 700
Payment terms     Interest payment due quarterly  
Line of Credit [Member] | Secured Debt [Member]        
Debt Instrument [Line Items]        
Amount outstanding     $ 0 $ 500
Payment terms      Interest payments due monthly.  
Current borrowing capacity     $ 1,000  
Prime Rate [Member] | Unsecured Debt [Member] | Promissory Note [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate     1.00%  
Prime Rate [Member] | Line of Credit [Member] | Unsecured Debt [Member]        
Debt Instrument [Line Items]        
Percentage bearing variable interest, percentage rate     5.00%  
Prime Rate [Member] | Line of Credit [Member] | Secured Debt [Member]        
Debt Instrument [Line Items]        
Percentage bearing variable interest, percentage rate     4.50%  
Three-month LIBOR [Member] | Unsecured Debt [Member] | Trust Preferred Security Offering, 2005 [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate   3.75%    
Three-month LIBOR [Member] | Unsecured Debt [Member] | Trust Preferred Security Offering, 2007 [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 3.40%