STOCK BASED AND DEFERRED COMPENSATION - Summary of Additional Information Regarding Stock Plan (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2017 |
Dec. 31, 2016 |
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| Summary of stock based compensation agreements | ||
| Unrecognized stock-based compensation cost | $ 18,439 | $ 18,528 |
| Weighted average years expense recognition period | 2 years 5 months 23 days | 2 years 6 months 22 days |
| Total equity awards outstanding (in shares) | 1,269,657 | 1,147,271 |
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- Definition Share based compensation arrangement by share based payment award number of shares outstanding. No definition available.
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- References No definition available.
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- Definition Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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