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Stockholders' Equity	6 Months Ended
Stockholders' Equity	Jun. 30, 2018
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity On February 14, 2018, the Company retired 109,207 shares of its treasury stock. On December 31, 2017 the shares were acquired in satisfaction of withholding taxes which were paid by the Company on behalf of coworkers under the Performance Share Awards program.