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Finance Liabilities (Analysis of Finance Liabilities on Balance Sheets) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Finance Liabilities |  |
Total finance liabilities | $ 137,934 | $ 142,370
Finance liabilities, net of deferred financing costs | 136,611 | 140,931
Less: Current finance liabilities, net of deferred financing costs, current | (9,020) | (8,802)
Finance liabilities, excluding current maturities | 127,591 | 132,129
Lessee Lease Description [Line Items] |  |
Less: Deferred financing costs | (7,526) | (7,609)
Finance Liabilities [Member] |  |
Lessee Lease Description [Line Items] |  |
Less: Deferred financing costs | $ (1,323) | $ (1,439)

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