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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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Schedule of Earnings Per Share [Line Items]        
Income from continuing operations $ 15,138 $ 19,760 $ 24,514 $ 37,066
Less: income allocated to participating securities (12) (483) (175) (852)
Less: participating securities dividends (202) (186) (405) (372)
Less: preferred stock dividends (5,113) (5,114) (10,226) (9,689)
Income from continuing operations allocated to common stockholders 9,811 13,977 13,708 26,153
Income from discontinued operations (2,881) 6,768 4,944 9,149
Net income available to common stockholders $ 6,930 $ 20,745 $ 18,652 $ 35,302
Weighted average common shares outstanding (in shares) 50,289,590 47,426,841 50,058,540 43,694,683
Dilutive effects of warrants (in shares) 383,375 560,667 401,497 503,304
Average shares and dilutive common shares (in shares) 50,942,324 48,554,434 50,736,098 44,614,049
Basic earnings per common share        
Income from continuing operations (in usd per share) $ 0.20 $ 0.30 $ 0.27 $ 0.60
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.21
Net income (in usd per share) 0.14 0.44 0.37 0.81
Diluted earnings per common share        
Income from continuing operations (in usd per share) 0.20 0.29 0.27 0.59
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.20
Net income (in usd per share) $ 0.14 $ 0.43 $ 0.37 $ 0.79
Restricted Stock Units (RSUs)        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 42,756 258,521 68,664 198,582
Stock Option        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 226,603 308,405 207,397 217,480
Class A Common Stock        
Schedule of Earnings Per Share [Line Items]        
Income from continuing operations $ 15,054 $ 19,718 $ 24,396 $ 37,001
Less: income allocated to participating securities (12) (482) (174) (851)
Less: participating securities dividends (201) (186) (403) (371)
Less: preferred stock dividends (5,085) (5,103) (10,177) (9,672)
Income from continuing operations allocated to common stockholders 9,756 13,947 13,642 26,107
Income from discontinued operations (2,865) 6,753 4,920 9,133
Net income available to common stockholders $ 6,891 $ 20,700 $ 18,562 $ 35,240
Weighted average common shares outstanding (in shares) 50,010,943 47,324,887 49,817,624 43,618,536
Dilutive effects of warrants (in shares) 383,375 560,667 401,497 503,304
Average shares and dilutive common shares (in shares) 50,663,677 48,452,480 50,495,182 44,537,902
Basic earnings per common share        
Income from continuing operations (in usd per share) $ 0.20 $ 0.30 $ 0.27 $ 0.60
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.21
Net income (in usd per share) 0.14 0.44 0.37 0.81
Diluted earnings per common share        
Income from continuing operations (in usd per share) 0.20 0.29 0.27 0.59
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.20
Net income (in usd per share) $ 0.14 $ 0.43 $ 0.37 $ 0.79
Class A Common Stock | Restricted Stock Units (RSUs)        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 42,756 258,521 68,664 198,582
Class A Common Stock | Stock Option        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 226,603 308,405 207,397 217,480
Class B Common Stock        
Schedule of Earnings Per Share [Line Items]        
Income from continuing operations $ 84 $ 42 $ 118 $ 65
Less: income allocated to participating securities 0 (1) (1) (1)
Less: participating securities dividends (1) 0 (2) (1)
Less: preferred stock dividends (28) (11) (49) (17)
Income from continuing operations allocated to common stockholders 55 30 66 46
Income from discontinued operations (16) 15 24 16
Net income available to common stockholders $ 39 $ 45 $ 90 $ 62
Weighted average common shares outstanding (in shares) 278,647 101,954 240,916 76,147
Dilutive effects of warrants (in shares) 0 0 0 0
Average shares and dilutive common shares (in shares) 278,647 101,954 240,916 76,147
Basic earnings per common share        
Income from continuing operations (in usd per share) $ 0.20 $ 0.30 $ 0.27 $ 0.60
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.21
Net income (in usd per share) 0.14 0.44 0.37 0.81
Diluted earnings per common share        
Income from continuing operations (in usd per share) 0.20 0.30 0.27 0.60
Income from discontinued operations (in usd per share) (0.06) 0.14 0.10 0.21
Net income (in usd per share) $ 0.14 $ 0.44 $ 0.37 $ 0.81
Class B Common Stock | Restricted Stock Units (RSUs)        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 0 0 0 0
Class B Common Stock | Stock Option        
Schedule of Earnings Per Share [Line Items]        
Dilutive effects of restricted stock units and stock options (in shares) 0 0 0 0