Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	$ 0	$ 0
Net operating loss carryforwards	0
Deferred income tax assets:
Policy benefit reserves	1,463,227	1,733,672
Credit losses/Impairments	28,519	15,166
Amounts due reinsurer	0	8,784
Other policyholder funds	3,789	4,359
Deferred compensation	2,161	3,705
Share-based compensation	2,189	2,775
Net operating loss carryforwards	0	37,509
Other	3,569	14,677
Gross deferred tax assets	1,503,454	1,820,647
Deferred income tax liabilities:
Deferred policy acquisition costs and deferred sales inducements	(1,146,016)	(1,303,385)
Net unrealized gains on available for sale fixed maturity securities	(639,769)	(392,189)
Derivative instruments	(119,444)	(109,287)
Policy benefit reserves	(123,270)	(147,924)
Investment income items	(28,719)	(42,105)
Amounts due reinsurer	(5,636)	0
Other	(4,603)	(3,654)
Gross deferred tax liabilities	(2,067,457)	(1,998,544)
Net deferred income tax liability	(564,003)	$ (177,897)
Deferred Tax Asset, Valuation Allowance, Unrealized Losses on Available For Sale Fixed Maturity Securities
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	$ 0

The amount as of the balance sheet date of the estimated future tax effects attributable to differences between the methods used to account for reinsurance arrangements for tax purposes and under generally accepted accounting principles which will decrease future taxable income when such differences reverse.

No definition available.