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SHAREHOLDERS' EQUITY (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 26, 2016 | Jan. 14, 2016 | Nov. 12, 2015 | May 07, 2014 | Jan. 11, 2010
Common stock issuance price for equity offering |  |  |  |  |  |  | $ 115.00 |  |
Proceeds from equity offering, net of offering costs | $ 91,500,000 |  | $ 91,462,000 |  |  |  |  |  |
Equity offering underwriting discounts | 5,900,000 |  |  |  |  |  |  |  |
Equity offering expenses | $ 700,000 |  |  |  |  |  |  |  |
Weighted average shares outstanding: |  |  |  |  |  |  |  |  |
Weighted average basic common shares (in shares) |  | 11,812,000 | 11,516,000 | 11,188,000 |  |  |  |  |
Effect of stock options (in shares) |  | 886,000 | 866,000 | 0 |  |  |  |  |
Effect of dilutive share awards (in shares) |  | 75,000 | 159,000 | 0 |  |  |  |  |
Weighted average diluted common shares (in shares) |  | 12,773,000 | 12,541,000 | 11,188,000 |  |  |  |  |
Additional disclosure |  |  |  |  |  |  |  |  |
Potentially dilutive securities included in the denominator for computing diluted loss per share |  |  |  | 0 |  |  |  |  |
Anti-dilutive securities excluded from calculation of diluted earnings per share |  |  |  | 700,000 |  |  |  |  |
Common Stock Repurchases |  |  |  |  |  |  |  |  |
Value of common stock authorized to be repurchased |  |  |  |  | $ 40,000,000.0 | $ 50,000,000.0 |  | $ 10,000,000.0 | $ 10,000,000
Purchase of treasury stock (in shares) |  | 690,218 | 5,250 | 99,345 |  |  |  |  |
Value of treasury stock acquired |  | $ 48,524,000 | $ 218,000 | $ 2,610,000 |  |  |  |  |
Remaining authorized repurchase amount |  | $ 48,700,000 |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |
Issuance of stock for equity offering (in shares) | 852,500 |  | 853,000 |  |  |  |  |  |
Proceeds from equity offering, net of offering costs |  |  | $ 9,000 |  |  |  |  |  |

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