CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Change in net unrealized gains (losses) on investments, income tax	$ 598,707	$ 263,211	$ 207,054	$ 563,641
Reclassification adjustment for investment amounts included in net income, income tax	5,847	(76)	8,498	(495)
Change in net unrealized gains (losses) on securities with credit losses, tax	1,266		(469)
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax		4,127		6,464
Change in accumulated (loss) gain - derivatives, income tax	594	(742)	(638)	(1,264)
Reclassification adjustment for derivative amounts included in net income, income tax	$ 308	$ 70	$ 561	$ 128

Other Comprehensive Income (Loss), Securities, Available-for-Sale, Cumulative Gain (Loss),Tax

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- Definition

Tax effect arising due to change in unrealized gain/loss relating to other than temporary impaired investments for which a portion has been recognized in earnings.

+ References

No definition available.

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- Definition

Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580

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Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

+ References

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-Name Accounting Standards Codification
-Topic 220
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