CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In- Capital	Treasury Stock	Accumulated Deficit	Stockholders' Equity	Noncontrolling Interest
Balances at beginning of period at Dec. 31, 2017	$ 1,530,291	$ 1,913	$ 4,126,549	$ (56,440)	$ (2,541,294)	$ 1,530,728	$ (437)
Balances at beginning of period (in shares) at Dec. 31, 2017	191,275,928	191,276,000
Compensation expense related to restricted stock grants	$ 14,675		14,675			14,675
Net income (loss)	(622,743)				(622,676)	(622,676)	(67)
Issuance of common stock under Associate Stock Purchase Plan	770	$ 1	769			770
Issuance of common stock under Associate Stock Purchase Plan (in shares)		111,000
Restricted stock, net		$ 28	(28)
Restricted stock, net (in shares)		2,805,000
Shares withheld for employee taxes	(2,715)	$ (4)	(2,711)			(2,715)
Shares withheld for employee taxes (in shares)		(394,000)
Other, net	379		99		280	379
Balances at end of period at Jun. 30, 2018	$ 920,657	$ 1,938	$ 4,139,353	$ (56,440)	$ (3,163,690)	$ 921,161	$ (504)
Balances at end of period (in shares) at Jun. 30, 2018	193,797,887	193,798,000