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Long-term Debt, Line of Credit and Derivatives - Debt Maturity Schedule (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Principal $ 53,790 $ 73,290
Term Loan | Line of Credit    
Debt Instrument [Line Items]    
2020 2,250  
2021 4,500  
2022 5,250  
2023 23,790  
Principal $ 35,790