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Contingencies (Tables)
3 Months Ended
Mar. 31, 2015
Contingencies [Abstract]  
Estimated Cost To Replace All Such Annuities For Which The Company Was Contingently Liable
   
At March 31,
   
At December 31,
 
(Dollars in thousands)
 
2015
   
2014
 
The Prudential
  $ 142,618     $ 142,653  
Unaffiliated life insurance company
    31,158       31,964