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NET (LOSS) INCOME PER SHARE (Basic and Diluted Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Basic net income per share: |  |  |  |  |  |  |  |  |  |  |
Net (loss) income | $ 14,980 | $ (31,881) | $ 12,020 | $ 11,732 | $ 20,405 | $ 8,990 | $ 4,282 | $ 2,618 | $ 6,851 | $ 36,295 | $ 22,027
Loss from discontinued operations, net of tax |  |  |  |  |  |  |  |  | (10,370) | (2,291) | (43,094)
Net (loss) income | $ 14,980 | $ (31,881) | $ 4,998 | $ 8,384 | $ 17,166 | $ 9,807 | $ 4,825 | $ 2,206 | $ (3,519) | $ 34,004 | $ (21,067)
Weighted average common shares outstanding |  |  |  |  |  |  |  |  | 34,495 | 32,432 | 28,416
Basic net income per common share from continuing operations | $ 0.41 | $ (0.90) | $ 0.36 | $ 0.36 | $ 0.63 | $ 0.28 | $ 0.13 | $ 0.08 | $ 0.20 | $ 1.12 | $ 0.78
Basic net loss per common share from discontinued operations |  |  |  |  |  |  |  |  | (0.30) | (0.07) | (1.52)
Net (loss) income per share - basic | $ 0.41 | $ (0.90) | $ 0.15 | $ 0.26 | $ 0.53 | $ 0.30 | $ 0.15 | $ 0.07 | $ (0.10) | $ 1.05 | $ (0.74)
Diluted net income per share: |  |  |  |  |  |  |  |  |  |  |
Net (loss) income | $ 14,980 | $ (31,881) | $ 12,020 | $ 11,732 | $ 20,405 | $ 8,990 | $ 4,282 | $ 2,618 | $ 6,851 | $ 36,295 | $ 22,027
Loss from discontinued operations (net of tax benefit) |  |  |  |  |  |  |  |  | (10,370) | (2,291) | (43,094)
Net (loss) income | $ 14,980 | $ (31,881) | $ 4,998 | $ 8,384 | $ 17,166 | $ 9,807 | $ 4,825 | $ 2,206 | $ (3,519) | $ 34,004 | $ (21,067)
Weighted average common shares outstanding |  |  |  |  |  |  |  |  | 34,495 | 32,432 | 28,416
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
2016 Convertible notes |  |  |  |  |  |  |  |  | 461 |  |
Stock options and restricted stock (in shares) |  |  |  |  |  |  |  |  | 721 | 528 | 386
Weighted average common shares for diluted earnings per share (in shares) |  |  |  |  |  |  |  |  | 35,677 | 32,960 | 28,802
Diluted net income per common share from continuing operations | $ 0.39 | $ (0.90) | $ 0.35 | $ 0.35 | $ 0.62 | $ 0.27 | $ 0.13 | $ 0.08 | $ 0.19 | $ 1.10 | $ 0.76
Diluted net loss per common share from discontinued operations |  |  |  |  |  |  |  |  | (0.29) | (0.07) | (1.50)
Net (loss) income per share - diluted | $ 0.39 | $ (0.90) | $ 0.15 | $ 0.25 | $ 0.52 | $ 0.30 | $ 0.15 | $ 0.07 | $ (0.10) | $ 1.03 | $ (0.74)

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