Business and Basis of Presentation (Unaudited Interim Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended							9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020		Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES
Other income (loss)	$ (41,719)			$ 3,339	[1]			$ (555,728)	$ 64,831	[1]
Realized investment gains (losses), net	5,080,691			(245,974)				7,372,863	(4,379,429)
TOTAL REVENUES	5,274,769			504,829				8,596,480	(2,112,038)
BENEFITS AND EXPENSES
Policyholders’ benefits	(241,771)			43,824				(215,754)	248,585
Interest credited to policyholders’ account balances	440,455			81,284				609,624	161,000
Commission expense	1,408,014			193,174				1,738,901	602,303
General, administrative and other expenses	(90,076)			29,604				38,395	160,487
TOTAL BENEFITS AND EXPENSES	1,535,703			552,402				2,572,901	1,612,105
Income tax expense (benefit)	777,976			134,587				1,247,276	(964,981)
NET INCOME (LOSS)	2,961,090	$ (74,600)	$ 1,889,813	$ (182,160)		$ (1,756,214)	$ (820,788)	4,776,303	$ (2,759,162)
Variable annuity | Impacts of recapture
REVENUES
Other income (loss)	1,000							1,000
Realized investment gains (losses), net	5,142,000							5,142,000
TOTAL REVENUES	5,143,000							5,143,000
BENEFITS AND EXPENSES
Policyholders’ benefits	(257,000)							(257,000)
Interest credited to policyholders’ account balances	399,000							399,000
Commission expense	1,362,000							1,362,000
General, administrative and other expenses	(191,000)							(191,000)
TOTAL BENEFITS AND EXPENSES	1,313,000							1,313,000
INCOME (LOSS) FROM OPERATING BEFORE INCOME TAXES	3,830,000							3,830,000
Income tax expense (benefit)	804,000							804,000
NET INCOME (LOSS)	$ 3,026,000							$ 3,026,000

[1] Prior period amounts have been reclassified to conform to current period presentation.