Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 165,540	$ 185,345
Unrealized gains (losses) on securities:
Unrealized gains (losses)	(962,641)	694,939
Less applicable tax (expense) benefit	202,150	(145,936)
Unrealized gains (losses) on investments, net of tax	(760,491)	549,003
Deferred acquisition costs:
Unrealized gains (losses) attributable to deferred acquisition costs	383	(3,199)
Less applicable tax (expense) benefit	(80)	671
Unrealized gains (losses) attributable to deferred acquisition costs, net of tax	303	(2,528)
Foreign exchange translation:
Foreign exchange translation adjustments, other than securities	(27,442)	3,089
Less applicable tax (expense) benefit	5,763	(647)
Foreign exchange translation adjustments, other than securities, net of tax	(21,679)	2,442
Pension:
Amortization of pension costs	4,157	2,120
Less applicable tax (expense) benefit	(873)	(445)
Pension adjustments, net of tax	3,284	1,675
Other comprehensive income (loss)	(778,583)	550,592
Comprehensive income (loss)	(613,043)	735,937
Securities
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during period	(977,936)	693,482
Other reclassification adjustments included in net income	28,412	(2,444)
Foreign exchange adjustment on securities recorded at fair value	(2,397)	(142)
Unrealized gains (losses)	(951,921)	690,896
Other investments
Unrealized gains (losses) on securities:
Unrealized gains (losses)	$ (10,720)	$ 4,043