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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Stock Repurchased and Retired

Share repurchases under this authorization were as follows:

		Repurchases Occurring in the Six Months Ended June 30, 2018							Cumulative Repurchases as of June 30, 2018
		Shares			Average Price				Shares			Average Price
2016 Share Repurchase Authorization		640,586			$	99.89			1,683,311			$	89.96

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Tabular disclosure of stock repurchased and retired during the period.

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