Reinsurance (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Maximum Retention of Life Insurance Face Amount	$ 100,000	$ 100,000
Reinsurance Retention Policy, Reinsured Risk, Percentage	100.00%
Percentage Amount of Coinsurance for Accident and Health Insurance Reinsurance	100.00%
Reinsurance Recoverable on Claims Payable and Future Policy Benefit Reserves for a specific reinsurer	$ 51,000
Reinsurance Recoverable on Claims Payable and Future Policy Benefit Reserves	3,862,000	4,166,000
Maximum Amount of Casualty Reinsurance for First Catastrophe	10,000,000	10,000,000
Maximum Amount of Casualty Reinsurance for Second Catastrophy	10,000,000
Reinsurance Deductible for First Catastrophe	500,000
Reinsurance Deductible for Second Catastrophy	500,000
Assumed Premiums, Life Insurance in Force	22,915,000	36,766,000	$ 268,641,000
Aggregate ceded life insurance in force	(522,821,000)	(516,933,000)	(516,643,000)
Premiums, Net, Life Insurance in Force	4,497,735,000	4,478,202,000	4,662,660,000
Direct Premiums Earned	201,074,000	197,337,000	191,438,000
Assumed Premiums Earned	151,000	353,000	421,000
Ceded Premiums Earned	(3,349,000)	(3,210,000)	(3,327,000)
Net reinsurance premiums earned	191,254,000	187,686,000	181,857,000
Premiums Earned, Net	197,876,000	194,480,000	188,532,000
Claims and surrenders assumed	237,000	414,000	466,000
Claims and surrenders ceded	(877,000)	(1,013,000)	(1,108,000)
Payments for Reinsurance	800,000	900,000	1,000,000
Premiums from short-duration contracts
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned	6,927,000	7,223,000	7,209,000
Assumed Premiums Earned	0	0	0
Ceded Premiums Earned	(828,000)	(873,000)	(967,000)
Net reinsurance premiums earned	6,099,000	6,350,000	6,242,000
Premiums from long-duration contracts
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned	194,147,000	190,114,000	184,229,000
Assumed Premiums Earned	151,000	353,000	421,000
Ceded Premiums Earned	(2,521,000)	(2,337,000)	(2,360,000)
Net reinsurance premiums earned	$ 191,777,000	$ 188,130,000	$ 182,290,000