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COMMON STOCK REPURCHASE AND ISSUANCE - Repurchase Program November 2014 (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 12, 2014 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Equity, Class of Treasury stock |  |  |  |
Value of shares repurchased |  | $ 2,525 | $ 140 | $ 4,096
Repurchase program November 2014 |  |  |  |
Equity, Class of Treasury stock |  |  |  |
Share repurchase program, Authorized amount | $ 40,000 |  |  |
Share repurchase program, Period in force | 24 months |  |  |
Shares repurchased under program |  | 623,765 | 72,739 | 2,054,655
Value of shares repurchased |  | $ 2,500 | $ 100 | $ 4,100

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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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