Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 739,704	$ 744,959	$ 731,773
Unrealized gains (losses) on fixed maturities:
unrealized investment gains (losses)	(5,298,692)	(519,345)	1,510,033
Less applicable tax (expense) benefit	1,112,730	109,063	(317,111)
Unrealized gains (losses) on investments, net of tax	(4,185,962)	(410,282)	1,192,922
Deferred acquisition costs:
Unrealized gains (losses) attributable to deferred acquisition costs	9,707	1,628	1,533
Less applicable tax (expense) benefit	(2,039)	(342)	(321)
Unrealized gains (losses) attributable to deferred acquisition costs, net of tax	7,668	1,286	1,212
Foreign exchange translation:
Foreign exchange translation adjustments, other than securities	(25,219)	(4,955)	14,230
Less applicable tax (expense) benefit	5,296	1,040	(2,986)
Foreign exchange translation adjustments, other than securities, net of tax	(19,923)	(3,915)	11,244
Pension:
Amortization of pension costs	13,754	20,797	16,632
Plan amendments	0	(4,565)	0
Experience gain (loss)	119,055	61,299	(43,169)
Pension adjustments	132,809	77,531	(26,537)
Less applicable tax (expense) benefit	(27,889)	(16,281)	5,573
Pension adjustments, net of tax	104,920	61,250	(20,964)
Other comprehensive income (loss)	(4,093,297)	(351,661)	1,184,414
Comprehensive income (loss)	(3,353,593)	393,298	1,916,187
Securities
Unrealized gains (losses) on fixed maturities:
Unrealized holding gains (losses) arising during period	(5,332,818)	(492,267)	1,493,200
Other reclassification adjustments included in net income	32,377	(31,710)	32,809
Foreign exchange adjustment on fixed maturities recorded at fair value	1,749	4,632	2,330
unrealized investment gains (losses)	(5,298,692)	(519,345)	1,528,339
Other investments
Unrealized gains (losses) on fixed maturities:
unrealized investment gains (losses)	$ 0	$ 0	$ (18,306)