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Investments In Securities and Fair Value (Schedule of Cost-method Investments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items] |  |
Beginning balance | $ 13,675 | $ 8,741
Other than temporary impairment losses, investments | 0 | 0
Observable changes | 0 | 0
Purchases and additional commitments paid | 250 | 6,543
Sales, returns of capital, and other reductions | (30) | (1,609)
Ending balance | 13,895 | 13,675
Real Estate Investment |  |
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items] |  |
Beginning balance | 4,987 | 0
Other than temporary impairment losses, investments | 0 | 0
Observable changes | 0 | 0
Purchases and additional commitments paid | 0 | 5,000
Sales, returns of capital, and other reductions | 0 | (13)
Ending balance | 4,987 | 4,987
Cost-method Investments |  |
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items] |  |
Beginning balance | 8,688 | 8,741
Other than temporary impairment losses, investments | 0 | 0
Observable changes | 0 | 0
Purchases and additional commitments paid | 250 | 1,543
Sales, returns of capital, and other reductions | (30) | (1,596)
Ending balance | $ 8,908 | $ 8,688

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- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
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