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Financial Instruments (Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets |  |
Note receivable | $ 9,888 | $ 0
Investments |  |
Assets |  |
Assets | 4,997,428 | 4,910,800
Fair Value, Measurements, Recurring |  |
Assets |  |
Note receivable | 9,888 |
Liabilities |  |
Options sold | 512 | 162
Notes payable | 549,539 | 375,631
Fair Value, Measurements, Recurring | Unsecured debt |  |
Liabilities |  |
Notes payable | 349,556 | 350,644
Fair Value, Measurements, Recurring | Options sold |  |
Liabilities |  |
Options sold | $ 512 | $ 162

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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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