Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in carrying amounts of goodwill by segment

The following table reflects the changes in carrying amounts of goodwill by segment for the six months ended June 30, 2019:

(In thousands)	Harsco Environmental Segment			Harsco Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Balance at December 31, 2018	$	391,687		$	—	$	13,026	$	404,713
Changes to goodwill (a)	—			313,806		—		313,806
Foreign currency translation	(792		)	—		—		(792		)
Balance at June 30, 2019	$	390,895		$	313,806	$	13,026	$	717,727

(a) The changes to goodwill related to the acquisition of Clean Earth. See Note 3, Acquisitions and Dispositions, for additional information.

Schedule of intangible assets by class

Intangible assets, net on the Company's Condensed Consolidated Balance Sheets consist of the following:

	June 30, 2019				December 31, 2018
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer related	$	154,835	$	94,593	$	122,379	$	93,580
Permits	176,121		—		—		—
Technology related	34,920		3,690		35,831		2,681
Trade names	31,542		858		5,565		681
Air rights	25,584		—		—
Patents	262		171		2,598		2,503
Other	3,817		1,081		4,215		1,936
Total	$	427,081	$	100,393	$	170,588	$	101,381

Schedule of amortization expense

Amortization expense for intangible assets was as follows:

	Three Months Ended				Six Months Ended
	June 30				June 30
(In thousands)	2019		2018		2019		2018
Amortization expense for intangible assets	$	1,901	$	1,197	$	3,840	$	2,027

Schedule of estimated amortization expense

The estimated amortization expense for the next five fiscal years based on current intangible assets is as follows:

(In thousands)	2019		2020		2021		2022		2023
Estimated amortization expense (b)	$	18,700	$	29,500	$	26,250	$	23,000	$	23,000

(b) These estimated amortization expense amounts do not reflect the potential effect of future foreign currency exchange fluctuations