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EARNINGS PER COMMON SHARE - Computations for Basic and Diluted Earnings/(Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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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 (loss) | $ 19,038 | $ 14,536 | $ 15,924 | $ 12,574 | $ 10,110 | $ 11,247 | $ 8,099 | $ 749 | $ 62,072 | $ 30,205 | $ (84)
Less: income allocated to participating securities |  |  |  |  |  |  |  |  | (1,310) | (498) | 0
Less: participating securities dividends |  |  |  |  |  |  |  |  | (713) | (543) | 0
Less: preferred stock dividends | $ (3,030) | $ (3,040) | $ (2,843) | $ (910) | $ (910) | $ (910) | $ (910) | $ (910) | (9,823) | (3,640) | (2,185)
Net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 50,226 | $ 25,524 | $ (2,269)
Weighted average common shares outstanding (in shares) |  |  |  |  |  |  |  |  | 37,046,594 | 28,044,441 | 15,286,834
Basic earnings per common share (in usd per share) |  |  |  |  |  |  |  |  | $ 1.36 | $ 0.91 | $ (0.15)
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders |  |  |  |  |  |  |  |  | $ 50,226 | $ 25,524 | $ (2,269)
Additional income allocation for class B dilutive shares |  |  |  |  |  |  |  |  | 0 | 0 | 0
Adjusted net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 50,226 | $ 25,524 | $ (2,269)
Add: Dilutive effects of purchase contracts |  |  |  |  |  |  |  |  | 0 | 26,807 | 0
Add: Dilutive effects of warrants |  |  |  |  |  |  |  |  | 383,255 | 115,997 | 0
Average shares and dilutive common shares (in shares) |  |  |  |  |  |  |  |  | 37,598,509 | 28,248,223 | 15,286,834
Diluted earnings per common share (in usd per share) |  |  |  |  |  |  |  |  | $ 1.34 | $ 0.90 | $ (0.15)
Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | $ 62,050 | $ 29,559 | $ (80)
Less: income allocated to participating securities |  |  |  |  |  |  |  |  | (1,310) | (487) | 0
Less: participating securities dividends |  |  |  |  |  |  |  |  | (713) | (531) | 0
Less: preferred stock dividends |  |  |  |  |  |  |  |  | (9,820) | (3,562) | (2,070)
Net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 50,207 | $ 24,979 | $ (2,150)
Weighted average common shares outstanding (in shares) |  |  |  |  |  |  |  |  | 37,033,725 | 27,444,878 | 14,481,060
Basic earnings per common share (in usd per share) | $ 0.40 | $ 0.29 | $ 0.33 | $ 0.30 | $ 0.25 | $ 0.31 | $ 0.27 | $ (0.01) | $ 1.36 | $ 0.91 | $ (0.15)
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders |  |  |  |  |  |  |  |  | $ 50,207 | $ 24,979 | $ (2,150)
Additional income allocation for class B dilutive shares |  |  |  |  |  |  |  |  | (520) | (106) | 0
Adjusted net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 49,687 | $ 24,873 | $ (2,150)
Add: Dilutive effects of purchase contracts |  |  |  |  |  |  |  |  | 0 | 26,807 | 0
Add: Dilutive effects of warrants |  |  |  |  |  |  |  |  | 0 | 0 | 0
Average shares and dilutive common shares (in shares) |  |  |  |  |  |  |  |  | 37,202,385 | 27,532,663 | 14,481,060
Diluted earnings per common share (in usd per share) | 0.39 | 0.29 | 0.32 | 0.29 | 0.25 | 0.31 | 0.27 | (0.01) | $ 1.34 | $ 0.90 | $ (0.15)
Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | $ 22 | $ 646 | $ (4)
Less: income allocated to participating securities |  |  |  |  |  |  |  |  | 0 | (11) | 0
Less: participating securities dividends |  |  |  |  |  |  |  |  | 0 | (12) | 0
Less: preferred stock dividends |  |  |  |  |  |  |  |  | (3) | (78) | (115)
Net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 19 | $ 545 | $ (119)
Weighted average common shares outstanding (in shares) |  |  |  |  |  |  |  |  | 12,869 | 599,563 | 805,774
Basic earnings per common share (in usd per share) | 0.40 | 0.29 | 0.33 | 0.30 | 0.25 | 0.31 | 0.27 | (0.01) | $ 1.36 | $ 0.91 | $ (0.15)
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders |  |  |  |  |  |  |  |  | $ 19 | $ 545 | $ (119)
Additional income allocation for class B dilutive shares |  |  |  |  |  |  |  |  | 520 | 106 | 0
Adjusted net income (loss) allocated to common stockholders |  |  |  |  |  |  |  |  | $ 539 | $ 651 | $ (119)
Add: Dilutive effects of purchase contracts |  |  |  |  |  |  |  |  | 0 | 0 | 0
Add: Dilutive effects of warrants |  |  |  |  |  |  |  |  | 383,255 | 115,997 | 0
Average shares and dilutive common shares (in shares) |  |  |  |  |  |  |  |  | 396,124 | 715,560 | 805,774
Diluted earnings per common share (in usd per share) | $ 0.40 | $ 0.29 | $ 0.33 | $ 0.30 | $ 0.25 | $ 0.31 | $ 0.25 | $ (0.01) | $ 1.36 | $ 0.91 | $ (0.15)
Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 138,646 | 52,286 | 0
Restricted Stock Units | Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 138,646 | 52,286 | 0
Restricted Stock Units | Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 0 | 0 | 0
Stock Option |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 30,014 | 8,692 | 0
Stock Option | Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 30,014 | 8,692 | 0
Stock Option | Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Add: Dilutive effects of restricted stock units and stock options |  |  |  |  |  |  |  |  | 0 | 0 | 0

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