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Note 8 - Lease Obligations (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets [Abstract]
Property, Plant and Equipment, Net	$ 537,191	$ 514,655
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 6,600	$ 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	$ 42,900	$ 41,200

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Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Indicates line item in statement of financial position that includes finance lease right-of-use asset.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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