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Debt - Summary of long-term debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Debt Instrument [Line Items]    
Capitalized lease obligations $ 13 $ 18
Long-term debt and capital lease obligations, gross 284,938 287,118
Unamortized debt discount (523) (600)
Long-term debt and capital lease obligations, net 284,415 286,518
Less: current maturities (2,809) (2,809)
Total 281,606 283,709
Term B loan due April 2021    
Debt Instrument [Line Items]    
Long-term debt, gross $ 284,925 $ 287,100