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Insurance Operations (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Change in liability for unpaid losses and LAE      
Balance at beginning of year $ 187,215 $ 158,929  
Less reinsurance recoverable (88,002) (79,115)  
Net balance at beginning of year 99,213 79,814  
Incurred related to Current year 119,458 112,838 107,424
Incurred related to Prior years 6,729 11,471 5,931
Total incurred 126,187 124,309  
Paid related to Current year 54,141 50,850  
Paid related to Prior years 59,433 54,060  
Total paid 113,574 104,910 97,838
Net balance at end of year 111,826 99,213 79,814
Plus reinsurance recoverable 81,415 88,002  
Balance at end of year $ 193,241 $ 187,215 $ 158,929