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Investments - Summary of Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Schedule of Investments [Line Items]    
Investment securities - fair value $ 35,460 $ 60,990
Parent    
Schedule of Investments [Line Items]    
Investment securities - fair value 35,460 60,990
Equity method investments (1) 12,575 12,030
Nonqualified retirement plan assets 7,166 8,724
Other investments 1,652 1,462
Total investments $ 56,853 $ 83,206