Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	$ 0	$ 0
Net operating loss carryforwards	178,600
Deferred income tax assets:
Policy benefit reserves	1,733,672	1,538,371
Other than temporary impairments	15,166	9,804
Net unrealized losses on available for sale fixed maturity securities	0	19,928
Derivative instruments	0	141,075
Amounts due reinsurer	8,784	0
Other policyholder funds	4,359	3,368
Deferred compensation	3,705	3,334
Share-based compensation	2,775	3,169
Net operating loss carryforwards	37,509	2,286
Other	14,677	9,439
Gross deferred tax assets	1,820,647	1,730,774
Deferred income tax liabilities:
Deferred policy acquisition costs and deferred sales inducements	(1,303,385)	(1,214,998)
Net unrealized gains on available for sale fixed maturity securities	(392,189)	0
Derivative instruments	(109,287)	0
Policy benefit reserves	(147,924)	(172,578)
Investment income items	(42,105)	(37,795)
Amounts due reinsurer	0	(12,620)
Other	(3,654)	(1,614)
Gross deferred tax liabilities	(1,998,544)	(1,439,605)
Net deferred income tax asset (liability)	(177,897)
Net deferred income tax asset (liability)		$ 291,169
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.