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Note 13 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property, plant and equipment, gross $ 830,694 $ 553,758
Less: accumulated depreciation (352,114) (259,035)
Property, plant and equipment, net 478,580 294,723
Property, Plant and Equipment, Net [Member]    
Assets under finance lease, gross 19,898 20,452
Less: accumulated amortization, assets under finance lease 7,733 6,674
Assets under finance lease, net 12,165 13,778
Land [Member]    
Property, plant and equipment, gross 21,580 3,379
Building [Member]    
Assets under finance lease, gross 18,623 18,932
Land Improvements [Member]    
Property, plant and equipment, gross 3,054 0
Plant and Equipment [Member]    
Property, plant and equipment, gross 701,400 519,866
Assets under finance lease, gross 1,275 1,520
Buildings and Leasehold Improvement [Member]    
Property, plant and equipment, gross $ 104,660 $ 30,513