Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

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 nine months ended September 30, 2018:

(In thousands)	Harsco Metals  & Minerals Segment				Harsco Industrial Segment		Harsco Rail Segment		Consolidated Totals
Balance at December 31, 2017	$	381,893			$	6,839	$	13,026	$	401,758
Changes to goodwill	26,737			(a)	—		—		26,737
Foreign currency translation	(8,144		)		—		—		(8,144		)
Balance at September 30, 2018	$	400,486			$	6,839	$	13,026	$	420,351

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:

	September 30, 2018				December 31, 2017
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer related (b)	$	137,498	$	98,834	$	153,014	$	121,385
Patents	2,590		2,495		5,825		5,700
Technology related (b)	36,666		1,851		26,131		26,131
Trade names (b)	9,311		1,754		8,317		4,845
Other	5,856		3,389		8,875		5,850
Total	$	191,921	$	108,323	$	202,162	$	163,911

Schedule of amortization expense

Amortization expense for intangible assets was as follows:

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2018		2017		2018		2017
Amortization expense for intangible assets	$	2,395	$	1,269	$	5,326	$	3,868

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)	2018		2019		2020		2021		2022
Estimated amortization expense (c)	$	7,900	$	9,750	$	9,250	$	8,800	$	8,500

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