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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table reflects the changes in carrying amounts of goodwill by segment for the years ended December 31, 2022 and 2021:
(In thousands)Harsco Environmental
Segment		Harsco
Clean Earth
Segment		Consolidated
Totals
Balance at December 31, 2020$406,401 $482,647 $889,048 
Changes to goodwill— 1,232 1,232 
Foreign currency translation(7,171)— (7,171)
Balance at December 31, 2021399,230 483,879 883,109 
Goodwill impairment— (104,580)(104,580)
Foreign currency translation(19,276)— (19,276)
Balance at December 31, 2022$379,954 $379,299 $759,253 
Schedule of Acquired Finite-Lived Intangible Assets by Major Class The following table reflects these intangible assets by major category:
December 31, 2022December 31, 2021
(In thousands)Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Customer related$95,573 $54,482 $104,322 $54,057 
Permits309,177 50,703 309,069 34,822 
Technology related20,800 15,491 39,886 13,415 
Trade names30,212 9,198 30,738 6,842 
Air rights26,139 2,411 26,139 1,675 
Patents189 155 179 138 
Non-compete agreement2,500 1,718 2,500 1,094 
Other3,147 1,419 3,407 1,396 
Total$487,737 $135,577 $516,240 $113,439 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense The following table shows the estimated amortization expense for the next five fiscal years based on current intangible assets.
(In thousands)20232024202520262027
Estimated amortization expense (b)
$28,200 $27,700 $27,500 $25,700 $24,400 
(b)    These estimated amortization expense amounts do not reflect the potential effect of future foreign currency exchange rate fluctuations.