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Components of Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Line Of Credit Facility [Line Items]    
Total debt $ 343,513 $ 235,917
Current portion of long-term debt (20,000) (20,000)
Unamortized debt issuance costs (1,491) (610)
Long-term debt, less current portion 322,022 215,307
Line of credit    
Line Of Credit Facility [Line Items]    
Total debt 252,000 188,000
Term Loans    
Line Of Credit Facility [Line Items]    
Total debt 85,000 45,000
Yen denominated line of credit    
Line Of Credit Facility [Line Items]    
Total debt 2,679 $ 2,917
Note payable    
Line Of Credit Facility [Line Items]    
Total debt 3,834  
Note payable | IPI    
Line Of Credit Facility [Line Items]    
Total debt $ 3,834