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