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STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
May 23, 2017
Mar. 17, 2017
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common shares left remaining to repurchase under the plan (up to)     942,443     942,443  
Stock repurchase program, authorized amount (up to)     $ 2,500,000     $ 2,500,000  
Number of shares of common stock outstanding     35,740,394     35,740,394  
Selling, General and Administrative Expenses [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation     $ 1,300,000   $ 1,100,000 $ 2,000,000 $ 1,800,000
Omnibus Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Additional shares available for grant (in shares) 2,000,000            
Aggregate share reserve (up to) 6,100,000            
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)           300,047  
Vested in period, net (in shares)     126,798   164,274 201,676 215,365
Restricted Stock [Member] | Omnibus Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)           300,047  
Vesting period           3 years  
Performance Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)           181,067  
Performance Stock [Member] | Omnibus Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)           181,067  
Level of performance attained and approved (percent)       48.00%      
Shares issued in period       86,784      
Common Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares issued (in shares)   3,175,584