Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 2019:

(In thousands)	Harsco Metals  & Minerals Segment		Harsco Industrial Segment		Harsco Rail Segment		Consolidated Totals
Balance at December 31, 2018	$	391,687	$	6,839	$	13,026	$	411,552
Foreign currency translation	897		—		—		897
Balance at March 31, 2019	$	392,584	$	6,839	$	13,026	$	412,449

Schedule of intangible assets by class

Intangible assets included in the caption, Intangible assets, net, on the Condensed Consolidated Balance Sheets consist of the following:

	March 31, 2019				December 31, 2018
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer related	$	137,242	$	101,090	$	136,307	$	99,383
Patents	2,597		2,505		2,598		2,503
Technology related	36,572		3,599		35,831		2,681
Trade names	9,298		2,051		9,212		1,897
Other	5,929		3,640		5,865		3,524
Total	$	191,638	$	112,885	$	189,813	$	109,988

Schedule of amortization expense

Amortization expense for intangible assets was as follows:

	Three Months Ended
	March 31
(In thousands)	2019		2018
Amortization expense for intangible assets	$	2,352	$	1,282

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 (a)	$	9,000	$	8,750	$	8,500	$	8,250	$	8,250

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