Stockholders' Equity

9 Months Ended

Sep. 30, 2017

Stockholders’ Equity

Repurchases of Class A Common Stock

Repurchases of our Class A Common Stock occurred under a repurchase authorization granted by our Board of Directors and related to shares withheld as part of the vesting of restricted stock units ("RSUs"). In February 2016, our Board of Directors authorized the repurchase of up to $250 million of our Class A common stock. Share repurchases under this authorization were as follows:



	Repurchases Occurring in the Nine Months Ended September 30, 2017			Cumulative Repurchases as of September 30, 2017
	Shares	Average Price		Shares	Average Price
2016 Share Repurchase Authorization	310,000	$	91.33	1,023,725	$	83.25

As of September 30, 2017, we had $164.8 million available for repurchases pursuant to our 2016 share repurchase authorization.

In addition, during the first nine months of 2017, we repurchased 32,300 shares at an average price of $99.33 per share, for a total of $3.2 million, related to tax withholdings associated with the vesting of RSUs. The repurchase of shares related to tax withholdings associated with stock awards does not reduce the number of shares available for repurchase as approved by our Board of Directors.