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Reclassifications	3 Months Ended
Reclassifications	Mar. 31, 2017
Disclosure Text Block [Abstract]
Reclassifications	Reclassifications Certain amounts in the accompanying consolidated financial statements for 2016, including the change in presentation of tax payments on stock-based compensation awards pursuant to ASU 2016-09, have been reclassified to conform to the 2017 consolidated financial statement presentation.