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Goodwill and Other Intangible Assets, Net - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
reporting_unit
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Goodwill [Line Items]        
Goodwill impairment $ 12.5 $ 12.5 $ 0.0 $ 0.0
Impairment of intangible assets   1.1    
Amortization expense   7.3 $ 9.0 $ 12.2
Estimated annual amortization expense for 2017   6.4    
Estimated annual amortization expense for 2018   6.1    
Estimated annual amortization expense for 2019   5.9    
Estimated annual amortization expense for 2020   5.9    
Estimated annual amortization expense for 2021   5.9    
Performance Engineered Products        
Goodwill [Line Items]        
Goodwill impairment   $ 12.5    
Impairment of intangible assets $ 1.1      
Amega West Services and Specialty Steel Supply        
Goodwill [Line Items]        
Number of reporting units, impacted by the weakness in oil and gas drilling activity | reporting_unit 2