Financial Schedules Schedule IV - Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Life Insurance Assumed Ratio	0.50%	0.80%	5.80%
Direct Premiums, Life Insurance in Force	$ 4,997,641	$ 4,958,369	$ 4,910,662
Ceded Premiums, Life Insurance in Force	522,821	516,933	516,643
Assumed Premiums, Life Insurance in Force	22,915	36,766	268,641
Premiums, Net, Life Insurance in Force	4,497,735	4,478,202	4,662,660
Direct Premiums Earned	201,074	197,337	191,438
Ceded Premiums Earned	3,349	3,210	3,327
Assumed Premiums Earned	151	353	421
Premiums Earned, Net	$ 197,876	$ 194,480	$ 188,532
Contracts in Force Subject to Participation through Reinsurance, Ratio	0.10%	0.20%	0.20%
Life Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned	$ 193,604	$ 189,644	$ 183,764
Ceded Premiums Earned	2,501	2,311	2,328
Assumed Premiums Earned	151	353	421
Premiums Earned, Net	191,254	187,686	181,857
Accident and Health Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned	1,566	1,625	1,589
Ceded Premiums Earned	20	26	32
Assumed Premiums Earned	0	0	0
Premiums Earned, Net	1,546	1,599	1,557
Property, Liability and Casualty Insurance Segment [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned	5,904	6,068	6,085
Ceded Premiums Earned	828	873	967
Assumed Premiums Earned	0	0	0
Premiums Earned, Net	$ 5,076	$ 5,195	$ 5,118