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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 323,473	$ 43,021	$ (368,969)
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the year	374,615	(291,731)	205,419
Adjustment for reclassification of net realized (gains) losses and OTTI losses recognized in net income (loss)	(24,729)	100,902	(33,134)
Unrealized gains (losses) arising during the year, net of reclassification adjustment	349,886	(190,829)	172,285
Foreign currency translation adjustment	(1,066)	(11,165)	41,938
Total other comprehensive income (loss), net of tax	348,820	(201,994)	214,223
Comprehensive income (loss)	$ 672,293	$ (158,973)	$ (154,746)

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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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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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