Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment for losses (gains) included in net income (loss)	$ 419			$ 43			$ 481	$ 78
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax	(59,398)			(88,339)			(36,330)	(340,600)
Change in current discount rate for liability for future policy benefits	60,054			73,214			45,825	345,258
Income tax expense (benefit) on other comprehensive income items	1,040			184			882	(6,162)
Other comprehensive income (loss)	1,696	$ (12,898)	$ 21,579	(14,941)	$ (3,752)	$ 17,189	$ 10,377	(1,504)
PUERTO RICO
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effective income tax rate, foreign income tax rate, percent							4.00%
AOCI Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized holding gains (losses) arising during period	(59,817)			(88,382)			$ (36,811)	(340,678)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax	8,717			398			7,548	13,790
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(51,100)			(87,984)			(29,263)	(326,888)
Reclassification adjustment for losses (gains) included in net income (loss)	419			43			481	78
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(88)			(9)			(101)	(16)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	331			34			380	62
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax	(59,398)			(88,339)			(36,330)	(340,600)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax	8,629			389			7,447	13,774
Unrealized investment gains (losses), net	(50,769)			(87,950)			(28,883)	(326,826)
Change in current discount rate for liability for future policy benefits	60,054			73,214			45,825	345,258
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, Tax	(7,589)			(205)			(6,565)	(19,936)
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax	52,465			73,009			39,260	325,322
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	656			(15,125)			9,495	4,658
Income tax expense (benefit) on other comprehensive income items	1,040			184			882	(6,162)
Other comprehensive income (loss)	$ 1,696			$ (14,941)			$ 10,377	$ (1,504)