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EMPLOYEE COMPENSATION PLANS (TABLES) | 12 Months Ended
--- | ---
Dec. 31, 2017
EMPLOYEE COMPENSATION PLANS [Abstract] |
Summary of non-vested RSU's and performance-based RSU's |
|  |  |  | Weighted |
|  |  |  | Average |
|  |  |  | Grant Date |
|  | Shares |  | Fair Value |
Unvested as of December 31, 2016 |  | 1,167,621 |  | $ | 25.29 |
Granted |  | 731,817 |  | $ | 29.56 |
Vested |  | (439,601) |  | $ | 24.25 |
Cancellations/expirations |  | (169,410) |  | $ | 26.77 |
Unvested as of December 31, 2017 |  | 1,290,427 |  | $ | 27.87 |
Schedule of stock option assumptions |
|  | Year Ended December 31, |
|  | 2011 |
Risk-free interest rate |  |  |  | 2.1 | %
Expected life in years |  | 1.3 | - | 2.7 |
Expected volatility |  |  |  | 54.4 | %
Dividend yield |  |  |  | — | %
Weighted-average volatility |  |  |  | 54.4 | %
Summary of stock option activity |
|  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  | Weighted |  | Average |  | Aggregate |
|  |  |  | Average |  | Remaining |  | Intrinsic |
|  |  |  | Exercise |  | Contract |  | Value |
|  | Shares |  | Price |  | Term in Years |  | (000’s) |
Outstanding as of December 31, 2016 |  | 191,666 |  | $ | 22.83 |  | 3.23 |  |  |  |
Exercises |  | (60,000) |  | $ | 35.81 |  |  |  | $ | 194 |
Post-vest cancellations/expirations |  | (16,666) |  | $ | 17.31 |  |  |  |  |  |
Outstanding as of December 31, 2017 |  | 115,000 |  | $ | 16.86 |  | 3.46 |  |  |  |
Vested and exercisable as of December 31, 2017 |  | 15,000 |  | $ | 13.87 |  | 0.71 |  | $ | 396 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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