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Insurance Operations (Details 1) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Beginning and Ending balances and the changes in DPAC, net of DRCC      
DPAC, beginning of year $ 57,482 $ 50,127 $ 43,971
DPAC, beginning of year, Adjusted 50,200    
Capitalized costs 107,180 114,358 100,615
Amortization of DPAC (102,949) (107,003) (94,459)
DPAC, end of year 54,431 57,482 50,127
DRCC, beginning of year 44,486 40,682 34,507
DRCC, beginning of year, Adjusted 38,845    
Ceding commissions written 85,063 89,330 82,568
Earned ceding commissions (86,759) (85,526) (76,393)
DRCC, end of year 37,149 44,486 40,682
DPAC (DRCC), net, beginning of year 12,996 9,445 9,464
DPAC (DRCC), net, beginning of year, Adjusted 11,355    
Capitalized costs, net 22,117 25,028 18,047
Amortization of DPAC (DRCC), net (16,190) (21,477) (18,066)
DPAC (DRCC), net, end of year $ 17,282 $ 12,996 $ 9,445