STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Policy charge revenue	$ 149,994	$ 151,446	$ 166,746
Net investment income (loss)	107,527	111,149	112,184
Net realized investment gains (losses)
Other-than-temporary impairment gains (losses) on securities		(4,563)	(1,764)
Portion of other-than-temporary impairments previously recognized in other comprehensive income (loss)		(121)	(109)
Net other-than-temporary impairment losses on securities recognized in income		(4,684)	(1,873)
Net realized investment gains (losses), excluding other- than-temporary impairment losses on securities	8,404	5,142	3,563
Net realized investment gains (losses)	8,404	458	1,690
Net derivative gains (losses)	(49,085)	(90,238)	(37,457)
Total Revenues	216,840	172,815	243,163
Benefits and Expenses
Interest credited to policyholder liabilities	52,299	55,015	54,914
Policy benefits (net of reinsurance recoveries: 2017 - $1,667; 2016 - $3,773; 2015 - $2,321)	2,499	65,067	105,246
Amortization (accretion) of deferred policy acquisition costs	3,716	3,680	3,783
Amortization (accretion) of value of business acquired	15,919	32,482	22,364
Insurance, General and Administrative Expenses	40,618	38,103	47,916
Total Benefits and Expenses	115,051	194,347	234,223
Income (Loss) Before Taxes	101,789	(21,532)	8,940
Income Tax Expense (Benefit)	2,384	(1,005)	(4,718)
Net Income (Loss)	$ 99,405	$ (20,527)	$ 13,658