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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Common stock shares issued (in shares)	8,366	6,568
Restricted stock grants, shares issued (in shares)	6,744	6,193

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Number of shares issued during the period as a result of an employee stock purchase plan.

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