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Borrowings - Other Borrowings (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]  
Remaining amount available under credit line $ 5,000,000.0
Line of Credit  
Debt Instrument [Line Items]  
Credit line 20,000,000.0
Amount borrowed from credit line $ 15,000,000.0
Credit line term 1 year
Line of Credit | London Interbank Offered Rate (LIBOR)  
Debt Instrument [Line Items]  
Basis spread on debt variable rate 1.75%