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STOCK-BASED COMPENSATION - Summary of Stock Options Activity (Detail)
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3 Months Ended |
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Mar. 31, 2015
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| Stock Options (in shares) | |
| Beginning balance | 528,680 |
| Granted | 167,204 |
| Forfeited | (6,974) |
| Expired | (8,808) |
| Exercised | (46,523) |
| Ending balance | 633,579 |
| Exercisable | 382,822 |