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Fair Value Measurements (Tables)
 9 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule of fair value of term loan and deferred consideration on acquisition
As of
 ​ ​
March 31,
2015
 ​ ​
June 30,
2014
 ​
Fair values ​ ​ ​
Term B Loan
 ​ ​ ​ $ 285,666 ​ ​ ​ ​ $ 289,638 ​ ​
Deferred consideration on acquisition
 ​ ​ ​ ​ 7,360 ​ ​ ​ ​ ​ — ​ ​