Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Net income	$ 151,869	[1]	$ 145,386	[2]	$ 414,331	[1]	$ 394,144	[2]
Unrealized gains (losses) on securities:
Total unrealized investment gains (losses)	233,086		(81,617)		1,390,294		(758,782)
Less applicable (taxes) benefits	(81,583)		28,690		(486,573)		265,555
Unrealized investment gains (losses), net of tax	151,503		(52,927)		903,721		(493,227)
Unrealized gains (losses) attributable to deferred acquisition costs	621		1,436		(4,829)		5,041
Less applicable (taxes) benefits	(216)		(502)		1,691		(1,764)
Unrealized gains (losses) attributable to deferred acquisition costs, net of tax	405		934		(3,138)		3,277
Foreign exchange translation adjustments, other than securities	120		(9,031)		7,262		(22,567)
Less applicable (taxes) benefits	(16)		3,164		(2,454)		7,667
Foreign exchange translation adjustments, other than securities, net of tax	104		(5,867)		4,808		(14,900)
Amortization of pension costs	2,551		3,646		7,654		10,935
Experience gain (loss)	0		0		791		183
Pension adjustments	2,551		3,646		8,445		11,118
Less applicable (taxes) benefits	(894)		(1,276)		(2,957)		(3,891)
Pension adjustments, net of tax	1,657		2,370		5,488		7,227
Other comprehensive income (loss)	153,669		(55,490)		910,879		(497,623)
Comprehensive income (loss)	305,538		89,896		1,325,210		(103,479)
Securities [Member]
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during period	236,040		(72,228)		1,397,181		(740,934)
Reclassification adjustment for (gains) losses on securities included in net income	(3,513)		(5,540)		(7,809)		(7,138)
Reclassification adjustment for amortization of (discount) and premium	(927)		(1,569)		(3,495)		(4,840)
Foreign exchange adjustment on securities recorded at fair value	(199)		(1,217)		849		(2,480)
Unrealized gains (losses) on securities	231,401		(80,554)		1,386,726		(755,392)
Other Investments [Member]
Unrealized gains (losses) on securities:
Unrealized gains (losses) on other investments	$ 1,685		$ (1,063)		$ 3,568		$ (3,390)

[1] Due to the adoption of ASU 2016-09, certain balances related to excess tax benefits from stock compensation were adjusted prospectively as described in Note 2—New Accounting Standards.

[2] Certain prior year balances were adjusted to give effect to discontinued operations as described in Note 5—Discontinued Operations.