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STOCK-BASED COMPENSATION (Details 2) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Summary of stock option activity |  |
Outstanding at beginning of period (in shares) | 406,731 |
Exercised (in shares) | (13,415) |
Expired (in shares) | (130,514) |
Outstanding at end of period (in shares) | 262,802 |
Vested or expected to vest at end of period (in shares) | 262,802 |
Exercisable at end of period (in shares) | 262,802 |
Outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ 26.72 |
Exercised, weighted average exercise price (in dollars per share) | $ 21.09 |
Expired, weighted average exercise price (in dollars per share) | $ 38.76 |
Outstanding at end of period, weighted average exercise price (in dollars per share) | $ 21.03 |
Vested or expected to vest at end of period, weighted average exercise price (in dollars per share) | $ 21.03 |
Exercisable at end of period, weighted average exercise price (in dollars per share) | $ 21.03 |
Outstanding at end of period, weighted average remaining term | 10 months 24 days |
Vested or expected to vest at end of period, weighted average remaining term | 10 months 24 days |
Exercisable at end of period, weighted average remaining term | 10 months 24 days |
Outstanding at end of period, aggregate intrinsic value | $ 4,064 |
Vested or expected to vest at end of period, aggregate intrinsic value | 4,064 |
Exercisable at end of period, aggregate intrinsic value | 4,064 |
Share based compensation plan, additional disclosures |  |
Total intrinsic value of options exercised | 194 | 127
Total fair value of options vested |  | $ 363
Minimum |  |
Stock Options |  |
Vesting period | 3 years |
Contractual term of stock option grants | 7 years |
Maximum |  |
Stock Options |  |
Vesting period | 4 years |
Contractual term of stock option grants | 10 years |

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- Definition The total fair value of stock options for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References No definition available. + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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