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Restructuring Activities (Tables)
 12 Months Ended
Dec. 31, 2021
Restructuring and Related Activities [Abstract]  
Changes in the Accrued Restructuring Liability Changes in accrued restructuring expenses for the 2020 Restructuring Activities, which are included in Accrued liabilities on the Consolidated balance sheets, were as follows as of December 31, (in thousands):
2021
Employee Termination BenefitsContract Terminations
& Other		Non-Current Asset AdjustmentsTotal
Balance, beginning of period$7,724 $16,196 $— $23,920 
Restructuring (benefit) expense(1,400)4,405 410 3,415 
Utilized – cash
(6,025)(17,608)— (23,633)
Utilized – non cash
— — (410)(410)
Foreign currency changes(178)(119)— (297)
Balance, end of period$121 $2,874 $— $2,995 
2020
Employee Termination BenefitsContract Terminations
& Other		Non-Current Asset AdjustmentsTotal
Balance, beginning of period$— $— $— $— 
Restructuring expense28,913 70,894 30,202 130,009 
Utilized – cash
(21,494)(54,773)— (76,267)
Utilized – non cash
— — (30,202)(30,202)
Foreign currency changes305 75 — 380 
Balance, end of period$7,724 $16,196 $— $23,920 
Changes in accrued restructuring expenses for the 2018 restructuring activities, which are included in Accrued liabilities on the Consolidated balance sheets during 2019 were as follows (in thousands). The changes in accrued restructuring expenses during 2020 related to the 2018 restructuring activities were immaterial.
 2019
Manufacturing Optimization PlanReorganization Plan
 Employee Termination BenefitsAccelerated DepreciationOtherTotalEmployee Termination BenefitsTotal
Balance, beginning of period$24,958 $— $79 $25,037 $3,461 $28,498 
Restructuring expense (benefit)15 14,684 17,971 32,670 (317)32,353 
Utilized - cash(24,102)— (16,950)(41,052)(3,118)(44,170)
Utilized - non cash— (14,684)(1,094)(15,778)— (15,778)
Foreign currency changes(6)— (4)(10)(26)(36)
Balance, end of period$865 $— $2 $867 $— $867