Stockholders' Equity

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

2016 Stock Repurchase Program

On June 2, 2016, our Board of Directors authorized a stock repurchase program of up to $100.0 million (the “Repurchase Program”). On May 18, 2017 and December 1, 2017, our Board of Directors authorized an additional $100.0 million, respectively, increasing the Repurchase Program to an aggregate authorization of $300.0 million. No time limit has been established for the completion of the program, and the program may be suspended, discontinued or replaced by the Board of Directors at any time without prior notice. As of December 31, 2017, we have $113.3 million available under this program to repurchase additional shares.

The following table details our stock repurchases under the Repurchase Program:

	Year Ended December 31,
	2017		2016
Shares of common stock repurchased and retired	4,674		452
Average price per share	$	35.94	$	41.06
Total cost	$	168,001	$	18,577

2015 Stock Repurchase Program

On November 5, 2015, our Board of Directors authorized a six-month stock repurchase program of up to $50.0 million (the “2015 Repurchase Program”). The 2015 Repurchase Program expired on May 5, 2016.

The following table details our stock repurchases under the 2015 Stock Repurchase Program:

	Year Ended December 31,
	2016		2015
Shares of common stock repurchased and retired	85		765
Average price per share	$	34.16	$	34.68
Total cost	$	2,902	$	26,516