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Investments - Summary of Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Investment [Line Items] |  |
Investment securities - fair value | $ 60,990 | $ 59,271
Investment securities - available for sale | 16 | 2,099
Parent |  |
Investment [Line Items] |  |
Investment securities - fair value | 60,990 | 59,271
Investment securities - available for sale | 0 | 2,023
Equity method investments | 12,030 | 10,573
Nonqualified retirement plan assets | 8,724 | 6,716
Other investments | 1,462 | 975
Total investments | $ 83,206 | $ 79,558

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