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Stock Option Plan (Detail Textuals) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Apr. 29, 2013
Feb. 26, 2009
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Mar. 12, 2008
Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Class A common shares available for grant            
Stock options exercise price            
Expense related to stock options     $ 0 $ 73 $ 215  
Weighted average remaining contractual life     3 years 8 months 12 days      
Aggregate intrinsic value     $ 37,562      
Stock Option | 2008 Incentive Plan (the "Incentive Plan")            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options, stock awards and other incentives authorized amount           6,630,000
Class A common shares available for grant     5,131,620      
Method used for valuation of fair value     Black-Scholes option pricing model      
Non Qualified Stock Option | 2008 Incentive Plan (the "Incentive Plan")            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options exercise price $ 11.83 $ 11.83        
Weighted-average grant-date fair value of the options     $ 0.99