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CAPITAL TRANSACTIONS Restricted Stock Units (Details) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) installment $ / shares shares | Dec. 31, 2016 USD ($) installment $ / shares shares | Dec. 31, 2015 USD ($) installment $ / shares shares
RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Finnerty Model discount for lack of marketability | 11.90% |  |
Share-based compensation expense | $ | $ 2.0 | $ 2.4 | $ 2.9
Unrecognized share-based compensation expense, options | $ | $ 1.3 | $ 2.0 |
Weighted-average period over which the remaining compensation expense is expected to be recognized | 1 year 2 months |  |
Unrecognized share-based compensation expense, other than options | $ | $ 3.5 |  |
Minimum statutory withholding requirements that the Company pays on behalf of its employees | shares | 43,000 | 20,000 |
2012 Stock Incentive Plan | RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year | 1 year | 1 year
Granted (in shares) | shares | 274,000 | 281,000 | 679,000
Granted (in dollars per share) | $ / shares | $ 12.62 | $ 9.49 | $ 12.61
Number of monthly installments for vesting of stock awards | installment | 12 | 12 | 12
2012 Stock Incentive Plan | RSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 12 months |  |
2012 Stock Incentive Plan | RSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 48 months |  |
2012 Stock Incentive Plan | Time-based RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years | 3 years |
Granted (in dollars per share) | $ / shares | $ 12.29 | $ 10.06 |
2012 Stock Incentive Plan | Performance-based RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years | 3 years | 3 years
Granted (in dollars per share) | $ / shares | $ 13.35 | $ 8.16 | $ 12.13
2012 Stock Incentive Plan | Board of Directors | RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restriction period | 2 years |  |
Number of shares subject to restriction period | shares | 96,000 | 69,000 |

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