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STOCKHOLDERS' EQUITY - Narratives (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Class Of Stock [Line Items] |  |  |  |
Conversion Of Stock Shares Issued1 | 852,831 |  |  |
Preferred Stock Liquidation Preference |  | $ 25 |  |
Common Stock Par Or Stated Value Per Share |  | $ 0.1 | $ 0.1 |
Par amount of the shares issued as common stock, Aggregate value |  | $ 22,038 | $ 21,870 |
Preferred Stock Value |  | $ 36,104 | $ 36,104 |
Common Stock Shares Authorized |  | 2,000,000,000 | 2,000,000,000 |
Common stock, shares issued |  | 220,382,343 | 218,700,394 |
Preferred Stock Shares Issued |  | 22,004,000 | 22,004,000 |
Dividends Preferred Stock Cash |  | $ 2,676 | $ 223 | $ 0
Shares of common stock repurchased |  | 438,891 | 291,759 |
Treasury Stock Shares |  | 4,104,303 | 1,254,189 |
Replenishment of the reserve fund required of at least of the original capital contributed, percent |  | 20.00% |  |
Restricted Stock [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Shares of common stock repurchased |  | 243,102 | 65,498 |
Senior Executives [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Shares of common stock repurchased |  | 195,789 | 226,261 |

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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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