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Goodwill and Other Intangible Assets
 3 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS
A summary of the carrying amount of goodwill attributable to each segment, as well as the changes in such carrying amounts, is as follows:
(in thousands)Metal CuttingInfrastructureTotal
Gross goodwill$448,241 $633,211 $1,081,452 
Accumulated impairment losses(177,661)(633,211)(810,872)
Balance as of June 30, 2020$270,580 $— $270,580 
Activity for the three months ended September 30, 2020:
Change in gross goodwill due to translation4,826 — 4,826 
Gross goodwill453,067 633,211 1,086,278 
Accumulated impairment losses(177,661)(633,211)(810,872)
Balance as of September 30, 2020$275,406 $— $275,406 
The components of our other intangible assets were as follows:
 Estimated
Useful Life
(in years)		September 30, 2020June 30, 2020
(in thousands)Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Technology-based and other
4 to 20
33,230 (23,363)32,713 (22,612)
Customer-related
10 to 21
182,809 (91,448)181,408 (88,112)
Unpatented technology
10 to 30
31,738 (18,590)31,586 (17,890)
Trademarks
5 to 20
13,200 (9,167)13,087 (8,772)
TrademarksIndefinite11,653 — 11,160 — 
Total$272,630 $(142,568)$269,954 $(137,386)