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Credit Arrangements (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Credit arrangements |  |
Total debt | $ 369,158 | $ 258,917
Unamortized debt issuance costs | (1,001) | (102)
Total debt, net | 368,157 | 258,815
Less: current portion | (62,488) | (65,464)
Long-term debt, net of current portion | 305,669 | 193,351
Scheduled maturities of long-term debt |  |
2019 | 62,488 |
2020 | 51,995 |
2021 | 37,312 |
2022 | 31,052 |
2023 | 165,067 |
Thereafter | 21,244 |
Term Loan |  |
Credit arrangements |  |
Total debt, net | 214,500 |
Commercial equipment notes |  |
Credit arrangements |  |
Total debt, net | 127,458 | 165,532
Mortgages |  |
Credit arrangements |  |
Total debt, net | $ 27,200 | 11,242
Senior secured notes |  |
Credit arrangements |  |
Total debt, net |  | $ 82,143

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