Income Taxes Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Future Policy Benefit Reserves	$ 78,372	$ 123,101
Deferred Tax Asset from Net Operating Loss and Capital Loss Carryforwards	485	0
Deferred Tax Asset, Due and Accrued Dividends and Expenses	65	104
Deferred Tax Assets, Investments	6,002	6,837
Deferred Tax Assets, State Income Tax Credits	0	119
Deferred Tax Assets, Other	276	56
Deferred Tax Assets, Gross	85,200	130,217
Deferred Tax Liabilty from Deferred Acquisition Cost, Value of Business Acquired and Other Intangibles	(25,518)	(44,709)
Deferred Tax Liability from Unrealized Gains on Investments Available for Sale	(8,297)	(7,556)
Deferred Tax Liability from Policyholder Dividends	(441)	(815)
Deferred Tax Liabilities, Other	(147)	(268)
Gross deferred federal income taxes	(34,403)	(53,348)
Deferred tax assets, net	$ 50,797	$ 76,869	$ 67,145