Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 127,110	$ 130,923	$ 248,758	$ 263,779	[1]
Unrealized gains (losses) on securities:
Less applicable taxes	328,996	(150,683)	236,865	(364,350)
Unrealized investment gains (losses), net of tax	(611,545)	279,929	(440,300)	676,819
Unrealized gains (losses) attributable to deferred acquisition costs	2,953	(3,045)	3,605	(7,273)
Less applicable taxes	(1,034)	1,066	(1,262)	2,546
Unrealized gains (losses) attributable to deferred acquisition costs, net of tax	1,919	(1,979)	2,343	(4,727)
Foreign exchange translation adjustments, other than securities	(4,845)	3,185	(13,536)	2,008
Less applicable taxes	1,774	(1,189)	4,503	(750)
Foreign exchange translation adjustments, other than securities, net of tax	(3,071)	1,996	(9,033)	1,258
Pension adjustments	3,653	3,031	7,472	5,605
Less applicable taxes	(1,278)	(1,061)	(2,615)	(1,962)
Pension adjustments, net of tax	2,375	1,970	4,857	3,643
Other comprehensive income (loss)	(610,322)	281,916	(442,133)	676,993
Comprehensive income (loss)	(483,212)	412,839	(193,375)	940,772
Securities [Member]
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during period	(935,288)	431,271	(668,706)	1,060,337
Reclassification adjustment for (gains) losses on securities included in net income	(1,479)	(577)	(1,598)	(17,196)
Reclassification adjustment for amortization of (discount) and premium	(1,599)	(2,317)	(3,271)	(4,544)
Foreign exchange adjustment on securities recorded at fair value	1,295	740	(1,263)	(131)
Unrealized gains (losses) on securities	(937,071)	429,117	(674,838)	1,038,466
Other Investments [Member]
Unrealized gains (losses) on securities:
Unrealized gains (losses) on other investments	(3,470)	1,495	(2,327)	2,703
Total unrealized investment gains (losses)	$ (940,541)	$ 430,612	$ (677,165)	$ 1,041,169

[1] Certain balances were retrospectively adjusted to give effect to the adoption of new accounting guidance as described in Note G- Adoption of New Accounting Standards