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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