Reinsurance and Policy Provisions Value of insurance in force acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in in Present Value of Future Insurance Profits [Roll Forward]
Present Value of Future Insurance Profits, Pre FAS 115	$ 17,263	$ 19,430	$ 21,608
Amortization per fixed schedule	(2,141)	(2,167)	(2,178)
Present Value of Future Insurance Profits, Pre FAS 115	15,122	17,263	19,430
Impact of net unrealized investment gains and losses	(12,498)	(6,878)	(14,870)
Value of insurance in force acquired	2,624	$ 10,385	$ 4,560
Present Value of Future Insurance Profits, Amortization Expense, Year One	2,200
Present Value of Future Insurance Profits, Amortization Expense, Year Two	2,000
Present Value of Future Insurance Profits, Amortization Expense, Year Three	2,000
Present Value of Future Insurance Profits, Amortization Expense, Year Four	2,000
Present Value of Future Insurance Profits, Amortization Expense, Year Five	$ 1,000