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Unsecured Debt and Lines of Credit
9 Months Ended
Sep. 30, 2013
Unsecured Debt and Lines of Credit [Abstract]  
Unsecured Debt and Lines of Credit
(6) Unsecured Debt and Lines of Credit
 
Unsecured debt and lines of credit consist of the following as of September 30, 2013 and December 31, 2012 ($ in thousands):

 
 
 
September 30,
2013
  
 
December 31,
2012
  
Weighted Average
Maturity
In Years
 
 
         
Bonds private placement - fixed rate
 
$
465,000
  
$
465,000
   
5.5
 
Term loan - variable rate
  
350,000
   
350,000
   
3.4
 
Bonds public offering - fixed rate
  
594,883
   
297,084
   
9.2
 
Unsecured debt
  
1,409,883
   
1,112,084
     
Lines of credit
  
15,352
   
141,000
   
0.3
 
Total unsecured debt and lines of credit
 
$
1,425,235
  
$
1,253,084
     
 
            
Weighted average interest rate on fixed rate unsecured bonds
  
4.0
%
  
4.2
%
    
Weighted average interest rate on variable rate term loan
  
2.5
%
  
2.7
%
    
Weighted average interest rate on line of credit
  
2.2
%
  
2.3
%
    
 
In April 2013, the Company issued $300 million aggregate principal amount of its 3.25% Senior Notes due on May 1, 2023 and such amount is included in the line item “Bonds public offering-fixed rate”, in the table above.