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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 282,966	$ 150,635	$ 633,693	$ 545,916
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the period	(167,060)	110,640	24,874	(170,786)
Adjustment for reclassification of net realized investment gains and OTTI losses recognized in net income	(72,670)	(8,657)	(116,213)	(46,571)
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(239,730)	101,983	(91,339)	(217,357)
Non-credit portion of OTTI losses	0	0	0	0
Foreign currency translation adjustment	(10,000)	3,635	(3,551)	(14,892)
Total other comprehensive income (loss), net of tax	(249,730)	105,618	(94,890)	(232,249)
Comprehensive income	$ 33,236	$ 256,253	$ 538,803	$ 313,667

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities and for unrealized loss realized upon the write-down of available-for-sale securities.

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