Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Insurance reserves	$ 2,391,739	$ 296,635
Other	2,894	0
Deferred tax assets	2,394,633	296,635
Deferred tax liabilities:
Deferred policy acquisition cost	1,003,301	142,147
Deferred sales inducements	78,676	0
Net unrealized gain on securities	114,705	180,067
Investments	155,891	124,821
Other	0	4,032
Deferred tax liabilities	1,352,573	451,067
Net deferred tax asset	$ 1,042,060
Net deferred tax liability		$ (154,432)