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Debt - Summary of long-term debt (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Debt Instrument [Line Items]    
Capitalized lease obligations $ 65 $ 94
Long-term debt and capital lease obligations, gross 289,340 290,094
Unamortized debt discount (677) (703)
Long-term debt and capital lease obligations, net 288,663 289,391
Less: current maturities (2,950) (2,969)
Long-term debt 285,713 286,422
Term B loan due April 15, 2021
   
Debt Instrument [Line Items]    
Long-term debt, gross $ 289,275 $ 290,000