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STOCK BASED AND DEFERRED COMPENSATION - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | 72 Months Ended
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2015
Options |  |  |  |
Options outstanding at beginning of year (in shares) | 181,440 | 258,815 | 609,585 |
Granted (in shares) | 0 | 0 | 0 | 0
Exercised (in shares) | (147,040) | (60,695) | (347,370) |
Cancelled (in shares) | (20,000) | (16,680) | (3,400) |
Outstanding at end of year (in shares) | 14,400 | 181,440 | 258,815 | 14,400
Weighted Average Exercise Price |  |  |  |
Options outstanding at beginning of year (in dollars per share) | $ 18.69 | $ 19.63 | $ 27.44 |
Exercised (in dollars per share) | 19.62 | 17.16 | 33.40 |
Cancelled (in dollars per share) | 13.69 | 38.86 | 14.00 |
Outstanding at end of year (in dollars per share) | $ 16.11 | $ 18.69 | $ 19.63 | $ 16.11
Options outstanding at end of year, additional disclosures |  |  |  |
Weighted Average Remaining Contractual Life | 2 months 25 days |  |  |
Aggregate Intrinsic Value | $ 257 |  |  | $ 257
Vested at end of year |  |  |  |
Options (in shares) | 14,400 |  |  | 14,400
Weighted Average Exercise Price (in dollars per share) | $ 16.11 |  |  | $ 16.11
Weighted Average Remaining Contractual Life | 2 months 25 days |  |  |
Aggregate Intrinsic Value | $ 257 |  |  | $ 257
Exercisable at end of year |  |  |  |
Options (in shares) | 14,400 | 181,440 | 225,415 | 14,400
Weighted Average Exercise Price (in dollars per share) | $ 16.11 | $ 18.69 | $ 20.36 | $ 16.11
Weighted Average Remaining Contractual Life | 2 months 25 days |  |  |
Aggregate Intrinsic Value | $ 257 |  |  | $ 257
Price range of options exercised - lower range limit (in dollars per share) | $ 11.48 | 11.48 | 8.06 |
Price range of options exercised - upper range limit (in dollars per share) | 22.11 | 42.82 | 44.44 |
Price range of options outstanding - lower range limit (in dollars per share) | 11.48 | 11.48 | 11.48 |
Price range of options outstanding - upper range limit (in dollars per share) | $ 22.11 | $ 22.11 | $ 42.82 |
Total shares reserved for existing or future equity award grants at end of year (in shares) | 2,224,800.42 |  |  | 2,224,800.42

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