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Investments - Summary of Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Schedule of Investments [Line Items]    
Investment securities - fair value $ 40,024 $ 60,990
Parent    
Schedule of Investments [Line Items]    
Investment securities - fair value 40,024 60,990
Equity method investments 11,461 12,030
Nonqualified retirement plan assets 8,526 8,724
Other investments 1,290 1,462
Total investments $ 61,301 $ 83,206