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Debt and Finance Lease Obligations - Schedule of Aggregate Annual Maturities of Long-term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total debt [1] $ 270,550 $ 315,235
Credit Facilities    
Debt Instrument [Line Items]    
2021 5,820  
2022 53  
2023 267,306  
2024 108  
2025  
Thereafter  
Total debt $ 273,287  
[1]

The weighted-average interest rate on total debt (including unamortized debt issuance costs and commitment fees) was 4.6% for 2020, 4.2% for 2019 and 4.3% for 2018. The estimated fair value of total debt and finance leases was $254.0 million as of December 31, 2020 and $304.0 million as of December 31, 2019. The fair value of debt was estimated by discounting the future cash flows using rates currently available for debt of similar terms and maturity, which is a Level 2 measurement. Refer to Note 13 – Fair Value Measurements.