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Note 8 - Lease Obligations (Details Textual) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets [Abstract] |  |
Property, Plant and Equipment, Net | $ 502,985 | $ 514,655
Finance Lease, Right-of-Use Asset, after Accumulated Amortization | $ 6,900 | $ 6,400
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, Plant and Equipment, Net | Property, Plant and Equipment, Net
Leased Office Facility [Member] |  |
Operating Lease, Right-of-Use Asset | $ 34,500 | $ 41,200

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