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Equity	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Equity	Equity Common Stock. At June 30, 2018, the Company had 35.3 million shares of common stock issued and outstanding, including an immaterial amount of unvested restricted stock awards, par value $0.001 per share, and 250.0 million shares of common stock authorized. Accelerated Vesting upon Change in Control. As a result of the election of a majority of non-incumbent directors nominated in connection with the proxy contest in the second quarter of 2018, vesting was accelerated for the majority of the Company's unvested restricted stock awards and all of the Company's unvested performance share units. See Note 3 and Note 15 for additional discussion of this event. Warrants. The Company has issued approximately 4.6 million Series A warrants and 2.0 million Series B warrants that 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, to certain holders of general unsecured claims as defined in the Plan. The warrants contain customary anti-dilution adjustments in the event of any stock split, reverse stock split, reclassification, stock dividend or other distributions.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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