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Debt (Components of Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Line Of Credit Facility [Line Items]    
Current portion of long-term debt $ 9,009 $ 9,007
Less: unamortized debt issuance costs (491) (493)
Long-term debt, less current portion 174,246 188,749
Less: unamortized debt issuance costs (1,504) (1,751)
Total debt 183,255 197,756
Term Loan    
Line Of Credit Facility [Line Items]    
Current portion of long-term debt 9,500 9,500
Long-term debt, less current portion $ 175,750 180,500
Revolving Facility    
Line Of Credit Facility [Line Items]    
Long-term debt, less current portion   $ 10,000