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STOCK-BASED COMPENSATION PLANS (Tables) | 12 Months Ended
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Dec. 31, 2014
STOCK-BASED COMPENSATION PLANS |
Summary of restricted stock activity |
|  | Number of Nonvested Restricted Shares |
Balance, December 31, 2012 |  |  | 243,124 |
Awarded |  |  | 423,518 |
Forfeited |  |  | (3,181 | )
Vested |  |  | (143,266 | )
​ | ​ | ​ | ​ | ​
Balance, December 31, 2013 |  |  | 520,195 |
Awarded |  |  | 168,334 |
Forfeited |  |  | (42,141 | )
Vested |  |  | (158,710 | )
​ | ​ | ​ | ​ | ​
Balance, December 31, 2014 |  |  | 487,678 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
Summary of performance based restricted stock activity |
|  | Total performance grants |
Outstanding, December 31, 2012 |  |  | 10,000 |
Awarded |  |  | 58,909 |
Performance criteria met |  |  | (18,775 | )
Forfeited |  |  | (34,944 | )
​ | ​ | ​ | ​ | ​
Outstanding, December 31, 2013 |  |  | 15,190 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
Awarded |  |  | 88,566 |
Performance criteria met |  |  | (92,583 | )
Forfeited |  |  | (5,281 | )
​ | ​ | ​ | ​ | ​
Outstanding, December 31, 2014 |  |  | 5,892 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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