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Deferred Policy Acquisition Costs (Tables)
12 Months Ended
Dec. 31, 2012
Deferred Policy Acquisition Costs / Reinsurance [Abstract]  
Changes in insurance subsidiaries' deferred policy acquisition costs
                         
    2012     2011     2010  

Balance, January 1

  $ 36,424,955     $ 34,445,579     $ 32,844,179  

Acquisition costs deferred

    78,010,742       70,550,376       67,955,400  

Amortization charged to earnings

    (74,314,000     (68,571,000     (66,354,000
   

 

 

   

 

 

   

 

 

 

Balance, December 31

  $ 40,121,697     $ 36,424,955     $ 34,445,579