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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
The carrying amount of goodwill
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)
Industrial
 
Widia
 
Infrastructure
 
Total
Gross goodwill
$
411,458

 
$
41,186

 
$
633,211

 
$
1,085,855

Accumulated impairment losses
(137,204
)
 
(13,638
)
 
(633,211
)
 
(784,053
)
Balance as of June 30, 2018
$
274,254

 
$
27,548

 
$
—

 
$
301,802

 
 
 
 
 
 
 
 
Activity for the three months ended September 30, 2018:
 
 
 
 
 
 
 
Change in gross goodwill due to translation
(570
)
 
(388
)
 
—

 
(958
)
 
 
 
 
 
 
 
 
Gross goodwill
410,888

 
40,798

 
633,211

 
1,084,897

Accumulated impairment losses
(137,204
)
 
(13,638
)
 
(633,211
)
 
(784,053
)
Balance as of September 30, 2018
$
273,684

 
$
27,160

 
$
—

 
$
300,844
The components of intangible assets
The components of our other intangible assets were as follows:
 
Estimated
Useful Life
(in years)
 
September 30, 2018
June 30, 2018
(in thousands)
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
 
Gross Carrying
Amount
 
Accumulated
Amortization
Contract-based
3 to 15
 
$
7,063

 
$
(7,045
)
 
 
$
7,061

 
$
(7,036
)
Technology-based and other
4 to 20
 
46,593

 
(31,213
)
 
 
46,666

 
(30,923
)
Customer-related
10 to 21
 
205,558

 
(87,484
)
 
 
206,162

 
(85,301
)
Unpatented technology
10 to 30
 
31,697

 
(13,644
)
 
 
31,854

 
(13,096
)
Trademarks
5 to 20
 
12,428

 
(9,027
)
 
 
12,450

 
(8,978
)
Trademarks
Indefinite
 
17,551

 
—

 
 
17,609

 
—

Total
 
 
$
320,890

 
$
(148,413
)
 
 
$
321,802

 
$
(145,334
)