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Fair Value Disclosure (On a Recurring Basis) (Details) - Fair value measurements, recurring - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Level 1 |  |
Assets: |  |
Equity securities | $ 12,238 | $ 10,120
Assets at fair value | 12,238 | 10,120
Level 2 |  |
Assets: |  |
Equity securities | 0 | 0
Assets at fair value | 0 | 0
Level 3 |  |
Assets: |  |
Equity securities | 0 | 0
Assets at fair value | 0 | 0
Total |  |
Assets: |  |
Equity securities | 12,238 | 10,120
Assets at fair value | $ 12,238 | $ 10,120

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