UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Document Fiscal Year Focus			2018
Net income (loss) attributable to common shareholders	$ 318,996	$ 301,620	$ 471,644	$ 454,463
Change in adjustments related to future policy benefit reserves, net of tax	42,314	3,437	46,478	8,569
Change in net unrealized gains (losses) on affiliate investments, net of tax	127	1,006	2,275	(1,457)
Change in net unrealized gains (losses) on other investments, net of tax	0	8,068	0	9,338
Change in OTTI losses recognized in other comprehensive income, net of tax	1,996	1,497	5,612	2,939
Change in underfunded pension liability, net of tax	413	(576)	224	(933)
Change in value of cash flow hedge	(47)	(48)	(95)	(96)
Foreign currency translation adjustments, net of tax	(28,296)	(1,092)	(30,728)	40,846
Comprehensive income (loss)	58,005	377,811	(148,570)	660,082
Excluding Life Funds Withheld Assets
Change in net unrealized gains (losses) on investments AFS, net of tax	(178,467)	75,855	(509,195)	178,477
Life Funds Withheld Assets
Change in net unrealized gains (losses) on investments AFS, net of tax	$ (99,031)	$ (11,956)	$ (134,785)	$ (32,064)