Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Net income	$ 527,100	$ 542,939	[1],[2]	$ 528,472	[1],[2]
Unrealized investment gains (losses):
Total unrealized investment gains (losses)	(1,166,032)	1,283,062		(1,183,652)
Less applicable (taxes) benefits	408,092	(448,985)		415,481
Unrealized gains (losses) on investments, net of tax	(757,940)	834,077		(768,171)
Unrealized gains (losses) attributable to deferred acquisition costs	8,682	(6,200)		14,906
Less applicable (taxes) benefits	(3,039)	2,170		(5,217)
Unrealized gains (losses) attributable to deferred acquisition costs, net of tax	5,643	(4,030)		9,689
Foreign exchange translation adjustments, other than securities	(20,651)	(10,770)		(2,962)
Less applicable (taxes) benefits	6,892	3,290		1,220
Foreign exchange translation adjustments, other than securities, net of tax	(13,759)	(7,480)		(1,742)
Pension adjustments:
Amortization of pension costs	14,586	10,285		18,366
Plan amendments	(2,104)	0		0
Experience gain (loss)	(11,632)	(65,817)		52,296
Pension adjustments	850	(55,532)		70,662
Less applicable (taxes) benefits	(299)	19,436		(24,732)
Pension adjustments, net of tax	551	(36,096)		45,930
Other comprehensive income (loss)	(765,505)	786,471		(714,294)
Comprehensive income (loss)	(238,405)	1,329,410		(185,822)
Securities [Member]
Unrealized investment gains (losses):
Unrealized holding gains (losses) arising during period	(1,163,259)	1,312,841		(1,166,332)
Reclassification adjustment for (gains) losses on securities included in net income	9,478	(23,771)		(13,138)
Reclassification adjustment for amortization of (discount) premium	(6,346)	(8,621)		(6,569)
Foreign exchange adjustment on securities recorded at fair value	(3,010)	(1,567)		(1,173)
Total unrealized investment gains (losses)	(1,163,137)	1,278,882		(1,187,212)
Other Investments [Member]
Unrealized investment gains (losses):
Unrealized holding gains (losses) arising during period	(1,793)	4,180		28
Reclassification adjustment for (gains) losses on securities included in net income	(1,102)	0		3,532
Total unrealized investment gains (losses)	$ (2,895)	$ 4,180		$ 3,560

[1] Certain balances were adjusted to give effect to discontinued operations and the adoption of new accounting guidance as described in Note 1- Significant Accounting Policies under the caption "Low-Income Housing Tax Credit Interests."

[2] Certain balances were adjusted to give effect to discontinued operations as described in Note 1—Significant Accounting Policies.