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Property, Plant and Equipment - Additional Information (Detail)
£ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
GBP (£)
Property Plant And Equipment [Line Items]        
Finance lease assets gross value $ 3,917,000 $ 3,917,000 $ 3,882,000  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Long Term Debt And Capital Lease Obligations Current Long Term Debt And Capital Lease Obligations Current Long Term Debt And Capital Lease Obligations Current Long Term Debt And Capital Lease Obligations Current
Finance lease, lease related accumulated amortization $ 1,577,000 $ 1,577,000 $ 1,263,000  
Depreciation expense   17,040,000 17,336,000  
Depreciation on assets under finance leases   496,000 $ 473,000  
Impairment of long lived assets 0      
Union Electric Steel UK Limited [Member]        
Property Plant And Equipment [Line Items]        
Land and buildings held as collateral $ 2,565,000 2,565,000   £ 2,122
Union Electric Steel UK Limited [Member] | Construction-in-Process [Member]        
Property Plant And Equipment [Line Items]        
Machinery and equipment purchased   $ 6,388,000