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Other Long Term Liabilities - Summary of Other Long Term Liabilities (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Jun. 30, 2015
Other Liabilities Disclosure [Abstract]    
Pension obligation $ 5.7 $ 4.9
Other 2.0 3.9
Total other long term liabilities $ 7.7 $ 8.8