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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Stock option activity and related information      
Number of options outstanding at June 30, 2014 245,300    
Number of options granted 0    
Number of options exercised (55,200) (134,450) (97,840)
Number of options cancelled 0    
Number of options outstanding at June 30, 2015 190,100 245,300  
Number of options vested or expected to vest at June 30, 2015 190,100    
Number of options exercisable at June 30, 2015 190,100    
Weighted average remaining contractual life 5 years 8 months 6 years 5 months  
Weighted average remaining contractual life vested or expected to vest at June 30, 2015 5 years 8 months    
Weighted average remaining contractual life exercisable at June 30, 2015 5 years 8 months    
Weighted average exercise price at June 30, 2014 $ 9.68    
Weighted average exercise price granted 0.00    
Weighted average exercise price exercised 8.94    
Weighted average exercise price cancelled 0.00    
Weighted average exercise price at June 30, 2015 9.90 $ 9.68  
Weighted average exercise price vested or expected to vest at June 30, 2015 9.90    
Weighted average exercise price exercisable at June 30, 2015 $ 9.90    
Aggregate intrinsic value exercised $ 737 $ 2,400 $ 600
Aggregate intrinsic value outstanding at June 30, 2015 1,593    
Aggregate intrinsic value vested or expected to be vest at June 30, 2015 1,593    
Aggregate intrinsic value exercisable at June 30, 2015 $ 1,593