CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Balances at beginning of period at Dec. 31, 2016	$ 2,077,732	$ 1,900	$ 4,102,397	$ (56,440)	$ (1,969,875)	$ 2,077,982	$ (250)
Balances at beginning of period (in shares) at Dec. 31, 2016	190,045,681	190,046,000
Compensation expense related to restricted stock grants	$ 22,547		22,547			22,547
Net income (loss)	(586,627)				(586,476)	(586,476)	(151)
Issuance of common stock under Associate Stock Purchase Plan	1,586	$ 1	1,585			1,586
Issuance of common stock under Associate Stock Purchase Plan (in shares)		130,000
Restricted stock, net		$ 18	(18)
Restricted stock, net (in shares)		1,755,000
Shares withheld for employee taxes	(5,666)	$ (4)	(5,662)			(5,666)
Shares withheld for employee taxes (in shares)		(393,000)
Other	114		114			114
Balances at end of period at Sep. 30, 2017	$ 1,509,686	$ 1,915	$ 4,120,963	$ (56,440)	$ (2,556,351)	$ 1,510,087	$ (401)
Balances at end of period (in shares) at Sep. 30, 2017	191,538,250	191,538,000