Reinsurance (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reinsurance
Gross Amount	$ 717,494	$ 696,721	$ 695,264
Ceded to Other Companies	29,990	29,634	31,940
Assumed from Other Companies	3,434	3,440	3,796
Net Amount	690,938	670,527	667,120
Percentage of Amount Assumed to Net	0.50%	0.50%	0.60%
Life Insurance in Force [Member]
Reinsurance
Gross Amount	15,102,466	14,632,272	14,161,408
Ceded to Other Companies	3,231,421	3,070,951	2,836,731
Assumed from Other Companies	0	0	0
Net Amount	11,871,045	11,561,321	11,324,677
Percentage of Amount Assumed to Net	0.00%	0.00%	0.00%
Property and casualty segment [Member]
Reinsurance
Gross Amount	582,780	566,853	570,264
Ceded to Other Companies	24,260	23,954	26,520
Assumed from Other Companies	3,434	3,440	3,796
Net Amount	561,954	546,339	547,540
Percentage of Amount Assumed to Net	0.60%	0.60%	0.70%
Annuity [Member]
Reinsurance
Gross Amount	22,575	21,794	18,883
Ceded to Other Companies	0	0	0
Assumed from Other Companies	0	0	0
Net Amount	22,575	21,794	18,883
Percentage of Amount Assumed to Net	0.00%	0.00%	0.00%
Life [Member]
Reinsurance
Gross Amount	112,139	108,074	106,117
Ceded to Other Companies	5,730	5,680	5,420
Assumed from Other Companies	0	0	0
Net Amount	$ 106,409	$ 102,394	$ 100,697
Percentage of Amount Assumed to Net	0.00%	0.00%	0.00%