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Notes Payable - Summary of Notes Payable (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Debt Instruments [Abstract]    
Payments/Long term debt $ 21,495 $ 51,089
Less current portion (4,899) (728)
Long term portion 16,596 50,361
Credit Facility [Member]    
Debt Instruments [Abstract]    
Payments/Long term debt $ 16,000 $ 46,000
Average effective interest rate 2.60% 3.90%
3.25% through 5.50% Notes Payable due in Next Year [Member]    
Debt Instruments [Abstract]    
Payments/Long term debt $ 5,495 $ 5,089
Annual installments $ 4,899  
3.25% through 5.50% Notes Payable due in Next Year [Member] | Minimum [Member]    
Debt Instruments [Abstract]    
Percentage of interest accrued 3.25%  
3.25% through 5.50% Notes Payable due in Next Year [Member] | Maximum [Member]    
Debt Instruments [Abstract]    
Percentage of interest accrued 5.50%