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Notes Payable (Line of Credit Narrative) (Details) (2013 Line of Credit [Member], USD $)
 3 Months Ended
Mar. 31, 2014
guarantor
occasions
banks
Dec. 31, 2013
Nov. 30, 2013
2013 Line of Credit [Member]
      
Line of Credit Facility [Line Items]      
Line of credit, maximum borrowing capacity     $ 140,000,000
Line of credit, number of banks in agreement 5    
Line of credit, length of credit agreement, years 4 years    
Line of credit, interest rate, floating, applicable margin 1.00%    
Line of credit, interest rate, floating, adjusted LIBOR 2.00%    
Line of credit, unused capacity, commitment fee percentage 0.35%    
Minimum risk-based capital ratio 275.00%    
Maximum debt to capital ratio 0.35    
Minimum capital to be retained 80.00%    
Minimum portion of net income to be retained 50.00%    
Minimum capital contributions to be retained 50.00%    
Line of credit, number of occasions borrowing capacity can be increased 3    
Line of credit, additional borrowing capacity, aggregate amount 50,000,000    
Line of credit, maturity date extension available, years 1 year    
Line of credit, number of guarantors 0    
Line of credit, amount outstanding $ 0 $ 0