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Severance and Other Charges (Credits), net - Employee Separation Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Reserve [Roll Forward]      
Balance at December 31, 2019 $ 5,837    
Additions for costs expensed 12,284 $ 9,744 $ 4,552
Severance and other payments (14,231)    
Other adjustments (1,224)    
Balance at December 31, 2020 2,666 5,837  
Corporate      
Restructuring Reserve [Roll Forward]      
Balance at December 31, 2019 2,186    
Additions for costs expensed 3,958    
Severance and other payments (4,448)    
Other adjustments (617)    
Balance at December 31, 2020 1,079 2,186  
Tubular Running Services | Operating segments      
Restructuring Reserve [Roll Forward]      
Balance at December 31, 2019 2,000    
Additions for costs expensed 6,621    
Severance and other payments (7,781)    
Other adjustments (586)    
Balance at December 31, 2020 254 2,000  
Tubulars | Operating segments      
Restructuring Reserve [Roll Forward]      
Balance at December 31, 2019 19    
Additions for costs expensed 553    
Severance and other payments (175)    
Other adjustments 0    
Balance at December 31, 2020 397 19  
Cementing Equipment | Operating segments      
Restructuring Reserve [Roll Forward]      
Balance at December 31, 2019 1,632    
Additions for costs expensed 1,152    
Severance and other payments (1,827)    
Other adjustments (21)    
Balance at December 31, 2020 $ 936 $ 1,632