Debt - Summary of long-term debt (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Jun. 30, 2014
Debt Instrument [Line Items]
Total	$ 284,410	$ 286,422
Term B loan due April 15, 2021
Debt Instrument [Line Items]
Long-term debt, gross	287,825	290,000
Capitalized lease obligations	24	94
Long-term debt and capital lease obligations, gross	287,849	290,094
Unamortized debt discount	(626)	(703)
Long-term debt and capital lease obligations, net	287,223	289,391
Less: current maturities	(2,813)	(2,969)
Total	$ 284,410	$ 286,422