Financial Schedules Schedule IV - Reinsurance (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Life Insurance Assumed Ratio	16.10%	21.90%	20.40%
Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount	$ 175,547	$ 167,087	$ 159,119
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	6,948	7,566	8,620
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies	1,275	1,874	1,553
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	169,874	161,395	152,052
Premium Income Subject to Participation Through Reinsurance, Percentage	0.80%	1.20%	1.00%
Life Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount	163,935	154,812	146,331
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	2,040	1,908	2,219
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies	1,275	1,874	1,553
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	163,170	154,778	145,665
Accident and Health Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount	5,510	6,091	6,847
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	3,874	4,530	5,270
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies	0	0	0
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	1,636	1,561	1,577
Property, Liability and Casualty Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount	6,102	6,184	5,941
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	1,034	1,128	1,131
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies	0	0	0
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	5,068	5,056	4,810
Life Insurance in Force [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Contracts in force, direct amount	4,641,794	4,559,198	4,451,979
Contracts in force, ceded to other companies	466,898	462,220	381,076
Contracts in Force Subject to Participation Through Reinsurance, Value	801,261	1,147,222	1,044,759
Net life insurance in force	$ 4,976,157	$ 5,244,200	$ 5,115,662