Equity

12 Months Ended

Dec. 31, 2019

Common Stock and Performance Share Units. At December 31, 2019, the Company had 35.8 million shares of common stock, par value $0.001 per share, issued and outstanding, including 0.2 million shares of unvested restricted stock awards, and 250.0 million shares of common stock authorized. The Company also had restricted stock awards and an immaterial amount of performance share units and stock options outstanding at December 31, 2019 as discussed further in Note 17.

Warrants. Since the fourth quarter of 2016, the Company has issued approximately 4.7 million Series A warrants and 2.0 million Series B warrants to certain holders of general unsecured claims as defined in the Plan. These warrants are exercisable until October 4, 2022 for one share of common stock per warrant at initial exercise prices of $41.34 and $42.03 per share, respectively, subject to adjustments pursuant to the terms of the warrants. The warrants contain customary anti-dilution adjustments in the event of any stock split, reverse stock split, reclassification, stock dividend or other distributions.

Shares Withheld for Taxes. The following table shows the number of shares withheld for taxes and the associated value of those shares (in thousands). These shares were accounted for as treasury stock when withheld, and then immediately retired.


	Year Ended December 31,
	2019		2018		2017
Number of shares withheld for taxes	56		495		349
Value of shares withheld for taxes	$	367	$	7,420	$	6,730