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Investments in Equity Securities (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 1,155,326	$ 941,243
Fair Value
Debt Securities, Available-for-sale [Line Items]
Cost	1,122,444	870,045
Gross Unrealized, Gains	114,045	100,275
Gross Unrealized, Losses	(81,163)	(29,077)
Equity securities	1,155,326	941,243
Fair Value | Common stock
Debt Securities, Available-for-sale [Line Items]
Cost	863,106	619,896
Gross Unrealized, Gains	111,393	92,401
Gross Unrealized, Losses	(41,827)	(16,894)
Equity securities	932,672	695,403
Fair Value | Preferred stocks
Debt Securities, Available-for-sale [Line Items]
Cost	259,338	250,149
Gross Unrealized, Gains	2,652	7,874
Gross Unrealized, Losses	(39,336)	(12,183)
Equity securities	222,654	245,840
Carrying Value
Debt Securities, Available-for-sale [Line Items]
Equity securities	1,155,326	941,243
Carrying Value | Common stock
Debt Securities, Available-for-sale [Line Items]
Equity securities	932,672	695,403
Carrying Value | Preferred stocks
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 222,654	$ 245,840

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

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+ References

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- Definition

Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117546-209714

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+ References

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-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117546-209714

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