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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Dec. 31, 2017
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, is as follows:
(in thousands)
Industrial
 
Widia
 
Infrastructure
 
Total
Gross goodwill
$
410,694

 
$
41,515

 
$
633,211

 
$
1,085,420

Accumulated impairment losses
(137,204
)
 
(13,638
)
 
(633,211
)
 
(784,053
)
Balance as of June 30, 2017
$
273,490

 
$
27,877

 
$
—

 
$
301,367

 
 
 
 
 
 
 
 
Activity for the six months ended December 31, 2017:
 
 
 
 
 
 
 
Change in gross goodwill due to translation
4,382

 
398

 
—

 
4,780

 
 
 
 
 
 
 
 
Gross goodwill
415,076

 
41,913

 
633,211

 
1,090,200

Accumulated impairment losses
(137,204
)
 
(13,638
)
 
(633,211
)
 
(784,053
)
Balance as of December 31, 2017
$
277,872

 
$
28,275

 
$
—

 
$
306,147
The components of intangible assets
The components of our other intangible assets were as follows:
 
Estimated
Useful Life
(in years)
 
December 31, 2017
June 30, 2017
(in thousands)
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
 
Gross Carrying
Amount
 
Accumulated
Amortization
Contract-based
3 to 15
 
$
7,070

 
$
(7,033
)
 
 
$
7,064

 
$
(7,014
)
Technology-based and other
4 to 20
 
47,032

 
(30,497
)
 
 
46,461

 
(29,061
)
Customer-related
10 to 21
 
207,102

 
(80,872
)
 
 
205,502

 
(74,669
)
Unpatented technology
10 to 30
 
31,924

 
(11,888
)
 
 
31,754

 
(10,589
)
Trademarks
5 to 20
 
12,530

 
(8,912
)
 
 
12,401

 
(8,648
)
Trademarks
Indefinite
 
18,067

 
—

 
 
17,326

 
—

Total
 
 
$
323,725

 
$
(139,202
)
 
 
$
320,508

 
$
(129,981
)