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Note 20 - Borrowings - Significant Borrowings as of Closing Date (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date $ 619,007 $ 822,152
Significant borrowings as of closing date [member] | Maverick Tube Corporation and Subsidiaries One [Member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date 50,000  
Significant borrowings as of closing date [member] | Maverick Tube Corporation and Subsidiaries Two [Member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date 75,000  
Significant borrowings as of closing date [member] | Tamsa Hydril and Other One [Member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date 60,000  
Significant borrowings as of closing date [member] | Tamsa Hydril and Other Two [Member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date 80,000  
Significant borrowings as of closing date [member] | Tamsa Hydril and Other Three [Member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date 60,000  
Significant borrowings as of closing date [member] | Saudi Steel Pipe Company [member]    
Disclosure of detailed information about borrowings [line items]    
Significant borrowings as of closing date $ 81,000