Reinsurance and Policy Provisions GMDB, IDB, GMIB (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Amount at Risk by Product and Guarantee [Line Items]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	$ 72,710	$ 83,340
Net Amount at Risk by Product and Guarantee, General Account Value	8,300	7,700
Net amount at risk by product and guarantee, benefits paid	$ 200	$ 200	$ 800
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	68 years	58 years
GMDB return of net deposits
Net Amount at Risk by Product and Guarantee [Line Items]
Net Amount at Risk by Product and Guarantee, Separate Account Value	$ 166,055	$ 147,567
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	362	430
Guaranteed Minimum Death Benefit
Net Amount at Risk by Product and Guarantee [Line Items]
Net Amount at Risk by Product and Guarantee, Separate Account Value	287,518	252,361
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	9,936	29,146
Incremental Death Benefit
Net Amount at Risk by Product and Guarantee [Line Items]
Net Amount at Risk by Product and Guarantee, Separate Account Value	259,735	228,863
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	62,411	53,727
Guaranteed Minimum Income Benefit
Net Amount at Risk by Product and Guarantee [Line Items]
Net Amount at Risk by Product and Guarantee, Separate Account Value	25,137	24,357
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	$ 1	$ 37