Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Unrealized holding gains (losses) arising during period	$ (132,765)	$ (79,422)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax	8,957	5,373
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(123,808)	(74,049)
Reclassification adjustments for losses (gains) included in net income	59	(35)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(12)	7
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	47	(28)
Other Comprehensive Income (Loss), Effects of Deferred Policy Acquisition Cost, before Tax	344	25,198
Other Comprehensive Income (Loss), Effects of Deferred Policy Acquisition Costs , Tax	(72)	(6,317)
Other Comprehensive Income (Loss), Effects of Deferred Policy Acquisition Costs, Net of Tax	272	18,881
Other Comprehensive Income (Loss), Effect of Cost of Insurance Acquired before Tax	152	269
Other Comprehensive Income (Loss), Effects of Cost of Insurance Acquired, Tax	(32)	(56)
Other Comprehensive Income (Loss), Effects of Cost of Insurance Acquired, Net of Tax	120	213
Other Comprehensive Income (Loss), Effect of Future Policy Benefit Reserves before Tax	(1,073)	(1,943)
Other Comprehensive Income (Loss), Effects of Future Policy Benefit Reserves, Tax	225	408
Other Comprehensive Income (Loss), Effects of Future Policy Benefit Reserves, Net of Tax	(848)	(1,535)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax	(133,283)	(55,933)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	9,066	(585)
Unrealized investment gains (losses), net	$ (124,217)	$ (56,518)