SHAREHOLDERS' EQUITY (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
Feb. 29, 2016Installmentshares | Jul. 31, 2015Installmentshares | Nov. 30, 2011Installmentshares | Aug. 31, 2010Installmentshares | Mar. 31, 2012Installmentshares | Dec. 31, 2016USD ($)Plan$ / sharesshares | Dec. 31, 2015USD ($)$ / sharesshares | Dec. 31, 2014USD ($)$ / sharesshares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of compensation plans | Plan | | | | | | 3 | | |
Share based compensation cost | $ | | | | | | $ 1.7 | $ 1.2 | $ 1.5 |
Stock Options [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | 0.8 | 0.2 | 0.7 |
Share based compensation cost, future income tax benefits | $ | | | | | | $ 0.3 | $ 0.1 | $ 0.2 |
Weighted-average assumptions used to estimate the fair value of options granted [Abstract] | | | | | | | | |
Expected annual dividend yield | | | | | | 0.00% | 0.00% | 0.00% |
Risk-free interest rate | | | | | | 1.64% | 1.73% | 2.02% |
Expected volatility | | | | | | 44.40% | 40.20% | 46.90% |
Expected life in years | | | | | | 7 years 1 month 6 days | 6 years 3 months 18 days | 6 years 2 months 12 days |
Outstanding and exercisable options, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at beginning of year (in shares) | | | | | | 954,625 | 1,127,250 | 1,175,499 |
Granted (in shares) | | | | | | 670,000 | 25,000 | 90,000 |
Exercised (in shares) | | | | | | 0 | (4,000) | (33,749) |
Cancelled or expired (in shares) | | | | | | (214,375) | (193,625) | (104,500) |
Outstanding at end of year (in shares) | | | | | | 1,410,250 | 954,625 | 1,127,250 |
Options exercisable at year end (in shares) | | | | | | 750,250 | 832,125 | 839,500 |
Weighted average fair value per option granted during the year (in dollars per share) | $ / shares | | | | | | $ 3.94 | $ 4.44 | $ 6.46 |
Outstanding and exercisable options, Weighted Average Exercise Price [Roll Forward] | | | | | | | | |
Outstanding at beginning of year (in dollars per share) | $ / shares | | | | | | 15.98 | 16.12 | 16.11 |
Granted (in dollars per share) | $ / shares | | | | | | 8.43 | 10.62 | 13.56 |
Exercised (in dollars per share) | $ / shares | | | | | | 0 | 6.30 | 9.78 |
Cancelled or expired (in dollars per share) | $ / shares | | | | | | 14.86 | 16.29 | 15.83 |
Outstanding at end of year (in dollars per share) | $ / shares | | | | | | $ 12.57 | $ 15.98 | $ 16.12 |
Weighted average grant date fair value [Roll Forward] | | | | | | | | |
Total intrinsic value of options exercised | $ | | | | | | | | $ 0.2 |
Unrecognized compensation costs | $ | | | | | | $ 1.9 | | |
Weighted average period of recognition | | | | | | 3 years 4 months 13 days | | |
Total fair value of stock options vested | $ | | | | | | $ 0.6 | $ 1.1 | 1.2 |
Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member] | Key Employee [Member] | Granted November 2011 [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | 0.1 | 0.2 | 0.2 |
Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member] | Key Employee [Member] | Grant February 2016 [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | 0.5 | | |
Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member] | Two Key Employees [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | 0.1 | 0.4 | 0.3 |
Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member] | Director [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | $ 0.1 | $ 0.1 | 0.1 |
Unvested Stock Options [Member] | | | | | | | | |
Activity for all unvested options [Roll Forward] | | | | | | | | |
Unvested at beginning of the year (in shares) | | | | | | 122,500 | | |
Granted (in shares) | | | | | | 670,000 | | |
Vested (in shares) | | | | | | (75,000) | | |
Forfeited (in shares) | | | | | | (57,500) | | |
Unvested at end of the year (in shares) | | | | | | 660,000 | 122,500 | |
Weighted average grant date fair value [Roll Forward] | | | | | | | | |
Unvested at the beginning of the year (in dollars per share) | $ / shares | | | | | | $ 7.40 | | |
Granted (in dollars per share) | $ / shares | | | | | | 3.94 | | |
Vested (in dollars per share) | $ / shares | | | | | | 8.40 | | |
Forfeited (in dollars per share) | $ / shares | | | | | | 4.43 | | |
Unvested at the end of the year (in dollars per share) | $ / shares | | | | | | $ 4.02 | $ 7.40 | |
1995 Stock Option Plan for Non-Employee Directors [Member] | Stock Options [Member] | | | | | | | | |
Outstanding and exercisable options, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at end of year (in shares) | | | | | | 0 | | |
1999 Long-term Stock Incentive Plan, as amended [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of shares authorized for issuance (in shares) | | | | | | 7,500,000 | | |
Number of shares granted per employee in total, maximum (in shares) | | | | | | 3,000,000 | | |
1999 Long-term Stock Incentive Plan, as amended [Member] | Stock Options [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of shares granted per employee in total, maximum (in shares) | | | | | | 1,500,000 | | |
Outstanding and exercisable options, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at end of year (in shares) | | | | | | 381,500 | | |
2006 Stock Incentive Plan For Non-Employee Directors [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of shares authorized for issuance (in shares) | | | | | | 200,000 | | |
2006 Stock Incentive Plan For Non-Employee Directors [Member] | Stock Options [Member] | | | | | | | | |
Outstanding and exercisable options, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at end of year (in shares) | | | | | | 5,000 | | |
2010 Long-term Stock Incentive Plan [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of shares authorized for issuance (in shares) | | | | | | 7,500,000 | | |
2010 Long-term Stock Incentive Plan [Member] | Stock Options [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Number of shares granted per employee in total, maximum (in shares) | | | | | | 1,500,000 | | |
Outstanding and exercisable options, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at end of year (in shares) | | | | | | 1,023,750 | | |
2010 Long-term Stock Incentive Plan [Member] | Restricted Stock Units [Member] | | | | | | | | |
Outstanding and exercisable restricted stock, Weighted Average Shares [Roll Forward] | | | | | | | | |
Outstanding at end of year (in shares) | | | | | | 250,000 | | |
2010 Long-term Stock Incentive Plan [Member] | Restricted Stock Units [Member] | Key Employee [Member] | | | | | | | | |
Activity for all unvested options [Roll Forward] | | | | | | | | |
Granted (in shares) | 75,000 | 23,620 | 100,000 | | | | | |
Restricted Stock and Restricted Stock Units [Abstract] | | | | | | | | |
Number of vesting installments | Installment | 3 | 4 | 10 | | | | | |
Number of units vesting annually (in shares) | | 5,905 | 10,000 | | | | | |
2010 Long-term Stock Incentive Plan [Member] | Restricted Stock Units [Member] | Key Employee [Member] | Granted August 2010 [Member] | | | | | | | | |
Activity for all unvested options [Roll Forward] | | | | | | | | |
Granted (in shares) | | | | 175,000 | | | | |
Restricted Stock and Restricted Stock Units [Abstract] | | | | | | | | |
Number of vesting installments | Installment | | | | 10 | | | | |
Number of units vesting annually (in shares) | | | | 17,500 | | | | |
2010 Long-term Stock Incentive Plan [Member] | Restricted Stock Units [Member] | Two Key Employees [Member] | | | | | | | | |
Activity for all unvested options [Roll Forward] | | | | | | | | |
Granted (in shares) | | | | | 50,000 | | | |
Vested (in shares) | | | | | (35,000) | | | |
Restricted Stock and Restricted Stock Units [Abstract] | | | | | | | | |
Number of vesting installments | Installment | | | | | 10 | | | |
Number of units vesting annually (in shares) | | | | | 10,000 | | | |
2010 Long-term Stock Incentive Plan [Member] | Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member] | Key Employee [Member] | Granted August 2010 [Member] | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | |
Share based compensation cost | $ | | | | | | $ 0.1 | $ 0.2 | $ 0.2 |
5.00 to 10.00 [Member] | | | | | | | | |
Options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) [Abstract] | | | | | | | | |
Range of Exercise Prices, Lower Range Limit (in dollars per share) | $ / shares | | | | | | $ 5 | | |
Range of Exercise Prices, Upper Range Limit (in dollars per share) | $ / shares | | | | | | $ 10 | | |
Number Exercisable (in shares) | | | | | | 573,362 | | |
Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 8.54 | | |
Weighted Average Remaining Contractual Life | | | | | | 9 years 2 months 23 days | | |
Aggregate Intrinsic Value | $ | | | | | | $ 0.2 | | |
10.01 to 15.00 [Member] | | | | | | | | |
Options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) [Abstract] | | | | | | | | |
Range of Exercise Prices, Lower Range Limit (in dollars per share) | $ / shares | | | | | | $ 10.01 | | |
Range of Exercise Prices, Upper Range Limit (in dollars per share) | $ / shares | | | | | | $ 15 | | |
Number Exercisable (in shares) | | | | | | 357,750 | | |
Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 13.04 | | |
Weighted Average Remaining Contractual Life | | | | | | 3 years 2 months 1 day | | |
Aggregate Intrinsic Value | $ | | | | | | $ 0 | | |
15.01 to 20.00 [Member] | | | | | | | | |
Options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) [Abstract] | | | | | | | | |
Range of Exercise Prices, Lower Range Limit (in dollars per share) | $ / shares | | | | | | $ 15.01 | | |
Range of Exercise Prices, Upper Range Limit (in dollars per share) | $ / shares | | | | | | $ 20 | | |
Number Exercisable (in shares) | | | | | | 290,000 | | |
Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 18.63 | | |
Weighted Average Remaining Contractual Life | | | | | | 3 years 8 months 26 days | | |
Aggregate Intrinsic Value | $ | | | | | | $ 0 | | |
20.01 to 20.15 [Member] | | | | | | | | |
Options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) [Abstract] | | | | | | | | |
Range of Exercise Prices, Lower Range Limit (in dollars per share) | $ / shares | | | | | | $ 20.01 | | |
Range of Exercise Prices, Upper Range Limit (in dollars per share) | $ / shares | | | | | | $ 20.15 | | |
Number Exercisable (in shares) | | | | | | 100,000 | | |
Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 20.15 | | |
Weighted Average Remaining Contractual Life | | | | | | 18 days | | |
Aggregate Intrinsic Value | $ | | | | | | $ 0 | | |
5.00 to 20.15 [Member] | | | | | | | | |
Options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) [Abstract] | | | | | | | | |
Range of Exercise Prices, Lower Range Limit (in dollars per share) | $ / shares | | | | | | $ 5 | | |
Range of Exercise Prices, Upper Range Limit (in dollars per share) | $ / shares | | | | | | $ 20.15 | | |
Number Exercisable (in shares) | | | | | | 1,321,112 | | |
Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 12.85 | | |
Weighted Average Remaining Contractual Life | | | | | | 5 years 8 months 8 days | | |
Aggregate Intrinsic Value | $ | | | | | | $ 0.2 | | |