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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

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- 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 + Details
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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 + Details
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