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Schedule II - Allowance for Uncollectible Premiums and Other Receivables
 12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]  
Schedule II - Allowance for Uncollective Premiums and Other Receivables
 
($ in thousands)
 
2012
 
2011
 
2010
Balance, January 1
 
$
7,668

 
8,091

 
8,380

Additions
 
4,536

 
4,990

 
5,003

Deductions
 
(3,498
)
 
(5,413
)
 
(5,292
)
Balance, December 31
 
$
8,706

 
7,668

 
8,091