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Restructuring (Tables)
 12 Months Ended
Dec. 31, 2021
Restructuring and Related Activities [Abstract]  
Restructuring and Other Related Charges
The following table presents the restructuring and other related charges by segment as classified in our condensed consolidated statements of income (loss).
 Years Ended December 31,
(in thousands)202120202019
Segment restructuring charges:
Production Chemical Technologies$6,508 $5,241 $— 
Production & Automation Technologies5,441 11,814 4,467 
Drilling Technologies— 5,521 710 
Reservoir Chemical Technologies415 348 — 
Corporate and other910 367 — 
Total$13,274 $23,291 $5,177 
Statements of Income (Loss) classification:
Cost of goods and services$6,554 $13,955 $3,592 
Selling, general and administrative expense6,720 9,336 1,585 
Total$13,274 $23,291 $5,177 
The following table details our restructuring accrual activities during the year ended December 31, 2021:
(in thousands)Restructuring Accrual Balance
December 31, 2020$2,951 
Restructuring charges9,419 
Payments(8,613)
Other, including foreign currency translation(14)
December 31, 2021$3,743