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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
Statement of Comprehensive Income [Abstract]
Net income	$ 186,613	$ 257,642	$ 364,460	$ 496,838
Other comprehensive income (loss), net of tax:
Unrealized investment gains (losses) arising during the period	36,336	(99,711)	238,656	(176,938)
Adjustment for reclassification of net realized investment gains (losses) and OTTI losses recognized in net income	(2,642)	74,810	42,620	128,770
Unrealized investment gains (losses) arising during the period, net of reclassification adjustment	33,694	(24,901)	281,276	(48,168)
Foreign currency translation adjustment	1,722	(14,626)	5,694	(23,851)
Total other comprehensive income (loss), net of tax	35,416	(39,527)	286,970	(72,019)
Comprehensive income	$ 222,029	$ 218,115	$ 651,430	$ 424,819

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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