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Equity Incentive Plan - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Jun. 30, 2015
Jun. 30, 2014
Options        
Options Outstanding, Beginning of Period (in shares) 1,498,000 1,513,500 1,513,500  
Granted (in shares) 46,500 10,000    
Exercised (in shares) 2,200 18,000    
Forfeited (in shares) 13,000 5,400    
Expired (in shares) 0 0    
Options Outstanding, End of period (in shares) 1,529,300 1,500,100 1,498,000 1,513,500
Exercisable (in shares) 829,400 549,150    
Weighted- average exercise price        
Options Outstanding, Beginning of Period (in usd per share) $ 14.41 $ 14.40 $ 14.40  
Granted (in usd per share) 17.35 16.08    
Exercised (in usd per share) 14.37 14.37    
Forfeited (in usd per share) 14.37 14.37    
Expired (in usd per share) 0.00 0.00    
Options Outstanding, End of Period (in usd per share) 14.50 14.40 $ 14.41 $ 14.40
Exercisable (in usd per share) $ 14.40 $ 14.39    
Remaining contractual life (years) 7 years 7 years 10 months 24 days 7 years 8 months 8 years 7 months 6 days
Granted, Remaining contractual life (years) 10 years 10 years    
Aggregate intrinsic value (in usd) $ 6,637 $ 2,340 $ 3,519 $ 2,077