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STOCK BASED COMPENSATION (Summary of Options Outstanding) (Details)
shares in Thousands
6 Months Ended
Jun. 30, 2017
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding | shares 1,273
Weighted Average Remaining Contractual Life 2 years 9 months 18 days
Number of Exercisable Options | shares 1,177
$6.00 - $6.99  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Limit | $ / shares $ 6.00
Exercise Price, Upper Limit | $ / shares $ 6.99
Weighted Average Remaining Contractual Life
$7.00 - $7.99  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Limit | $ / shares $ 7.00
Exercise Price, Upper Limit | $ / shares $ 7.99
Number of Options Outstanding | shares 357
Weighted Average Remaining Contractual Life 3 years 7 months 17 days
Number of Exercisable Options | shares 293
$8.00 - $8.99  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Limit | $ / shares $ 8.00
Exercise Price, Upper Limit | $ / shares $ 8.99
Number of Options Outstanding | shares 200
Weighted Average Remaining Contractual Life 2 years 7 days
Number of Exercisable Options | shares 190
$9.00 - $9.99  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Limit | $ / shares $ 9.00
Exercise Price, Upper Limit | $ / shares $ 9.99
Number of Options Outstanding | shares 480
Weighted Average Remaining Contractual Life 2 years 10 months 6 days
Number of Exercisable Options | shares 465
$10.00 - $14.50  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Limit | $ / shares $ 10.00
Exercise Price, Upper Limit | $ / shares $ 14.50
Number of Options Outstanding | shares 237
Weighted Average Remaining Contractual Life 1 year 10 months 7 days
Number of Exercisable Options | shares 229