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Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
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 2018:
 
 
 
 
 
 
 
Change in gross goodwill due to translation
764

 
(329
)
 
—

 
435

 
 
 
 
 
 
 
 
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 2019:
 
 
 
 
 
 
 
Change in gross goodwill due to translation
(1,546
)
 
(245
)
 
—

 
(1,791
)
 
 
 
 
 
 
 
 
Gross goodwill
409,912

 
40,941

 
633,211

 
1,084,064

Accumulated impairment losses
(137,204
)
 
(13,638
)
 
(633,211
)
 
(784,053
)
Balance as of June 30, 2019
$
272,708

 
$
27,303

 
$
—

 
$
300,011
Components of Other Intangible Assets [Table Text Block]
The components of our other intangible assets were as follows: 
 
Estimated
Useful Life
(in years)
 
June 30, 2019
 
 
June 30, 2018
(in thousands)
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
 
Gross Carrying
Amount
 
Accumulated
Amortization
Contract-based
3 to 15
 
$
7,062

 
$
(7,062
)
 
 
$
7,061

 
$
(7,036
)
Technology-based and other
4 to 20
 
46,228

 
(31,890
)
 
 
46,666

 
(30,923
)
Customer-related
10 to 21
 
205,213

 
(94,711
)
 
 
206,162

 
(85,301
)
Unpatented technology
10 to 30
 
31,702

 
(15,492
)
 
 
31,854

 
(13,096
)
Trademarks
5 to 20
 
14,755

 
(9,352
)
 
 
12,450

 
(8,978
)
Trademarks
Indefinite
 
14,545

 
—

 
 
17,609

 
—

Total
 
 
$
319,505

 
$
(158,507
)
 
 
$
321,802

 
$
(145,334
)