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COMMON STOCK REPURCHASES AND CASH DIVIDENDS Cash Dividends (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 31, 2017 Quarter $ / shares | Jan. 31, 2016 $ / shares | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares
Dividends Declared and Paid [Line Items] |  |  |  |  |  |
Common Stock, Dividends, Number of Quarterly Distributions Declared, Current Fiscal Year | Quarter | 4 |  |  |  |  |
Common Stock, Dividends, Per Share, Declared, Current Fiscal Year, First Quarter | $ 0.14 |  |  |  |  |
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Second Quarter |  | $ 0.14 |  |  |  |
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Third Quarter |  | 0.14 |  |  |  |
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Fourth Quarter |  | $ 0.14 |  |  |  |
Payments of Dividends | $ |  |  | $ 4,162 | $ 3,754 | $ 8,299 | $ 7,483
Common Stock, Dividends, Per Share, Cash Paid |  |  | $ 0.14 | $ 0.13 | $ 0.28 | $ 0.26

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