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STOCK-BASED COMPENSATION (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Nov. 30, 2015
Stock-based compensation        
Common stock authorized for future grants (in shares)       2,500,000
Stock-based compensation expense $ 6,617 $ 8,279 $ 9,983  
Contractual term of awards 10 years      
Minimum        
Stock-based compensation        
Continuous service period for awards to vest 1 year      
Maximum        
Stock-based compensation        
Continuous service period for awards to vest 3 years      
Stock options        
Stock-based compensation        
Stock-based compensation expense $ 221 $ 318 $ 393  
Stock options granted (in shares) 6,430      
Unrecognized compensation expense $ 100      
Weighted-average vesting period (years) 1 year 8 months 12 days      
Key assumptions used in Black-Scholes model to determine the fair value of each stock option and SAR        
Weighted-average expected volatility (as a percent) 36.50% 42.20% 41.70%  
Weighted-average expected life (in years) 4 years 6 months 5 years 6 months 5 years 6 months  
Weighted-average dividend yield (as a percent) 1.13% 1.10% 1.11%  
Weighted-average risk free interest rate (as a percent) 2.70% 1.80% 1.20%  
Stock appreciation rights        
Stock-based compensation        
Stock-based compensation expense $ 2,025 $ 1,988 $ 1,851  
Other than options granted (in shares) 72,860      
Unrecognized compensation expense $ 1,900      
Weighted-average vesting period (years) 1 year 8 months 12 days      
Key assumptions used in Black-Scholes model to determine the fair value of each stock option and SAR        
Weighted-average expected volatility (as a percent) 37.60% 42.40% 41.10%  
Weighted-average expected life (in years) 5 years 2 months 12 days 5 years 4 months 24 days 5 years 9 months 18 days  
Weighted-average dividend yield (as a percent) 1.13% 1.10% 1.11%  
Weighted-average risk free interest rate (as a percent) 2.70% 1.80% 1.30%  
Restricted stock        
Stock-based compensation        
Stock-based compensation expense $ 3,336 $ 4,487 $ 3,840  
Other than options granted (in shares) 43,460      
Unrecognized compensation expense $ 4,700      
Weighted-average vesting period (years) 3 years      
Performance stock        
Stock-based compensation        
Stock-based compensation expense $ 1,035 $ 1,486 $ 3,899  
Other than options granted (in shares) 59,820      
Earn out basis if all goals are met (as a percent) 200.00%      
Unrecognized compensation expense $ 1,600      
Weighted-average vesting period (years) 1 year 10 months 24 days      
Continuous service period for awards to vest 3 years