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EQUITY AND STOCK-BASED COMPENSATION - RESTRICTED STOCK AND RSUs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Annual vesting percentage     33.33% 33.33%  
Stock-based compensation expense     $ 5,116 $ 3,015  
Chief Executive Officer (CEO)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Annual vesting percentage     25.00% 25.00%  
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock grants     614,721 630,424  
Vesting period for options granted     3 years 3 years  
Restricted Stock Units (RSUs) | Chief Executive Officer (CEO)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period for options granted     4 years 4 years  
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period for options granted     3 years    
Stock-based compensation expense $ 2,858 $ 1,696 $ 5,116 $ 3,015  
Tax benefit from stock-based compensation 1,201 $ 700 2,137 $ 1,239  
Unrecognized Compensation Expense [Abstract]          
2016 6,352   6,352    
2017 10,983   10,983    
2018 7,745   7,745    
2019 2,915   2,915    
Unrecognized compensation expense, total $ 27,995   $ 27,995    
Restricted Stock and Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock grants     614,721   775,836