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Equity Incentive Plan - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jan. 17, 2013
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2013
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Equity incentive plan name 2013 Omnibus Incentive Plan                
Number of shares repurchased               846,400  
Shares repurchased, amount               $ 13,297,000  
Average price of shares purchased (in usd per share)               $ 15.71  
Share-based compensation expense   $ 451,000 $ 598,000 $ 3,244,000 $ 2,234,000        
Share-based compensation expense, tax related benefit   $ 167,000 $ 221,000 $ 1,200,000 $ 827,000        
Weighted average fair value of each option granted (in usd per share)       $ 7.76 $ 4.53        
Options outstanding (in shares)   1,513,742 1,529,300 1,513,742 1,529,300 1,529,300 1,498,000   1,529,300
Remaining contractual life (years)       5 years 10 months 17 days 7 years 6 years 9 months 18 days 7 years 8 months    
Stock Options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Compensation cost not yet recognized   $ 1,695,000   $ 1,695,000         $ 2,718,000
Compensation cost not yet recognized, period for recognition (in years)       1 year 5 months 23 days 1 year 7 months 6 days        
Stock Options | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Remaining contractual life (years)       5 years 5 years        
Stock Options | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Remaining contractual life (years)       7 years 7 years        
Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Compensation cost not yet recognized, period for recognition (in years)       1 year 9 months 18 days 1 year 8 months 12 days        
Compensation not yet recognized, share-based awards other than options   $ 2,937,000   $ 2,937,000         $ 4,451,000
Non-vested (in shares)   190,630 248,750 190,630 248,750 248,750 310,470   248,750
Restricted Stock | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period       5 years 5 years        
Restricted Stock | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period       7 years 7 years        
2013 Omnibus Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Equity incentive plan description provides for awards of restricted stock, restricted stock units, stock options, stock appreciation rights and cash awards to directors, emeritus directors, officers, employees and advisory directors                
Number of shares authorized (in shares) 2,962,400                
Shares held for awards of stock options and stock appreciation rights (in shares) 2,116,000                
Shares held for awards of restricted stock and restricted stock units (in shares) 846,400