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SHAREHOLDERS' EQUITY - Additional Information (Details) |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 21, 2019 $ / shares | Dec. 31, 2018 USD ($) board_member $ / shares shares | Dec. 31, 2017 $ / shares shares | Jun. 21, 2018 shares | Jun. 20, 2018 shares | Dec. 31, 1995 shares
Class Of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, shares authorized ( in shares) |  | 5,000,000 | 5,000,000 |  |  |
Number of board members elected by class A shareholders | board_member |  | 2 |  |  |  |
Common Stock, shares authorized (in shares) |  | 200,000,000 | 200,000,000 | 200,000,000 | 100,000,000 |
Common Stock, shares issued (in shares) |  | 48,681,524 | 48,476,034 |  |  |
Common Stock, shares outstanding (in shares) |  | 47,319,887 | 47,118,171 |  |  |
Treasury stock repurchased shares |  | 3,774 |  |  |  |
Treasury stock aggregate purchase price value | $ |  | $ 477,000 |  |  |  |
Common stock dividends declared per share | $ / shares |  | $ 0.24 | $ 0.12 |  |  |
Common stock dividends paid per share | $ / shares |  | $ 0.24 |  |  |  |
Common stock dividends paid | $ |  | $ 11,300,000 |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Common stock dividends declared per share | $ / shares | $ 0.10 |  |  |  |  |
Dividend declared date | Feb. 21, 2019 |  |  |  |  |
Dividend payable date | Mar. 29, 2019 |  |  |  |  |
Dividend record date | Mar. 15, 2019 |  |  |  |  |
Series A Nonconvertible Preferred Stock [Member] |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, shares issued (in shares) |  | 200,000 | 200,000 |  |  | 200,000
Preferred Stock, liquidation value per share (in dollars per share) | $ / shares |  | $ 7.50 | $ 7.50 |  |  |
Preferred stock voting rights |  | Holders of the Series A shares are entitled to one vote per share on matters which shareholders are generally entitled to vote. |  |  |  |
Preferred Stock, shares outstanding (in shares) |  | 200,000 | 200,000 |  |  |

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