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Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2020
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]      
Other Intangible Assets, Written off Related to Sale of Business Unit   $ 12,500  
The components of intangible assets      
Accumulated amortization $ (147,297)   $ (137,386)
Intangible Assets, Gross (Excluding Goodwill) 274,958   269,954
Trademarks [Member]      
The components of intangible assets      
Gross carrying amount, Indefinite 12,215   11,160
Technology-based and other [Member]      
The components of intangible assets      
Gross carrying amount, finite 33,881   32,713
Accumulated amortization (24,235)   (22,612)
Customer-related [Member]      
The components of intangible assets      
Gross carrying amount, finite 183,624   181,408
Accumulated amortization (94,174)   (88,112)
Unpatented technology [Member]      
The components of intangible assets      
Gross carrying amount, finite 31,906   31,586
Accumulated amortization (19,305)   (17,890)
Trademarks [Member]      
The components of intangible assets      
Gross carrying amount, finite 13,332   13,087
Accumulated amortization $ (9,583)   $ (8,772)
Minimum [Member] | Technology-based and other [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 4 years    
Minimum [Member] | Customer-related [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 10 years    
Minimum [Member] | Unpatented technology [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 10 years    
Minimum [Member] | Trademarks [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 5 years    
Maximum [Member] | Technology-based and other [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 20 years    
Maximum [Member] | Customer-related [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 21 years    
Maximum [Member] | Unpatented technology [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 30 years    
Maximum [Member] | Trademarks [Member]      
The components of intangible assets      
Useful life related to technology-based intangible assets 20 years    
WIDIA [Member]      
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   $ 1,500