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Segment Reporting
 12 Months Ended
Dec. 31, 2022
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Segment Reporting Segment Reporting
Our Industrial Materials segment, our only reportable segment, manufactures high-quality graphite electrodes essential to the production of EAF steel and other ferrous and non-ferrous metals. Petroleum needle coke, a crystalline form of carbon derived from decant oil, is a key raw material used in the production of graphite electrodes. We utilize the majority of the needle coke that we produce internally to manufacture our graphite electrodes and as a result approximately 95% of our revenues from external customers are derived from the sale of graphite electrodes. No single customer accounted for 10% or more of the Company's net sales in 2022, 2021 or 2020.
The following tables summarize information as to the Company's operations in different geographic areas:
Year Ended December 31,
202220212020
 (Dollars in thousands)
Net sales:
United States$340,793 $285,710 $260,867 
Americas (excluding the United States)256,253 241,442 187,779 
Asia Pacific116,849 154,084 127,415 
Europe, Middle East, Africa567,355 664,552 648,300 
Total$1,281,250 $1,345,788 $1,224,361 
 December 31,
20222021
(Dollars in thousands)
Long-lived assets (a):
United States$192,038 $179,003 
Mexico124,024 123,997 
Brazil4,327 4,090 
France93,880 93,579 
Spain104,392 100,248 
Other countries485 556 
Total$519,146 $501,473 
(a)Long-lived assets represent fixed assets, net of accumulated depreciation.