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Investments - Schedule of Held-to-Maturity Investments (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost $ 27,878
Gross Unrealized Gains 0
Gross Unrealized Losses (20)
Estimated Fair Market Value 27,858
Corporate and municipal bonds  
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost 27,878
Gross Unrealized Gains 0
Gross Unrealized Losses (20)
Estimated Fair Market Value $ 27,858