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Senior Notes
12 Months Ended
Dec. 31, 2013
Senior Notes [Abstract]  
Senior Notes
6.  SENIOR NOTES

The table below displays Holdings' outstanding senior notes.  Market value is based on quoted market prices, but due to limited trading activity, these senior notes are considered Level 2 in the fair value hierarchy.

               
December 31, 2013
 
December 31, 2012
               
Consolidated Balance
     
Consolidated Balance
   
(Dollars in thousands)
Date Issued
 
Date Due
 
Principal Amounts
 
Sheet Amount
 
Market Value
 
Sheet Amount
 
Market Value
5.40% Senior notes
10/12/2004
 
10/15/2014
  $ 250,000     $ 249,958     $ 259,130     $ 249,907     $ 266,390  

 
Interest expense incurred in connection with these senior notes is as follows for the periods indicated:

   
Years Ended December 31,
 
(Dollars in thousands)
 
2013
   
2012
   
2011
 
Interest expense incurred
  $ 13,551     $ 13,548     $ 13,546