Schedule II. Condensed Financial Information of Registrant (Condensed Statements of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net investment income	$ 987,499	$ 952,447	$ 927,062
Realized gains (losses)	(76,548)	59,319	(4,371)
Total revenue	5,214,906	5,112,869	4,737,921
General operating expenses	353,954	322,029	301,038
Interest expense	90,395	83,486	86,704
Total benefits and expenses	4,308,595	4,200,479	3,841,237
Income tax benefit (expense)	(166,607)	(167,431)	(164,911)
Net income	739,704	744,959	731,773
Other comprehensive income (loss):
Attributable to Parent Company	(4,093,297)	(351,661)	1,184,414
Comprehensive income (loss)	(3,353,593)	393,298	1,916,187
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net investment income	33,664	32,816	30,199
Realized gains (losses)	(9,643)	(5,682)	12,792
Total revenue	24,021	27,134	42,991
General operating expenses	59,307	51,378	57,679
Reimbursements from affiliates	(51,312)	(57,504)	(68,556)
Interest expense	97,051	86,751	90,197
Total benefits and expenses	105,046	80,625	79,320
Operating income (loss) before income taxes and equity in earnings of affiliates	(81,025)	(53,491)	(36,329)
Income tax benefit (expense)	12,426	9,682	7,773
Net operating loss before equity in earnings of affiliates	(68,599)	(43,809)	(28,556)
Equity in earnings of affiliates, net of tax	808,303	788,768	760,329
Net income	739,704	744,959	731,773
Other comprehensive income (loss):
Attributable to Parent Company	75,076	58,903	(21,477)
Attributable to affiliates	(4,168,373)	(410,564)	1,205,891
Comprehensive income (loss)	$ (3,353,593)	$ 393,298	$ 1,916,187