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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - shares | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Statement of Stockholders' Equity [Abstract] |  |
Common stock shares issued (in shares) | 6,568 | 9,647
Restricted stock grants, shares issued (in shares) | 6,193 | 7,435

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