CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 6 months ended Jun. 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	$ 15,020		15,020			15,020
Net income (loss)	(172,698)				(172,591)	(172,591)	(107)
Issuance of common stock under Associate Stock Purchase Plan	1,054	$ 1	1,053			1,054
Issuance of common stock under Associate Stock Purchase Plan (in shares)		80,000
Restricted stock, net		$ 19	(19)
Restricted stock, net (in shares)		1,864,000
Shares withheld for employee taxes	(5,320)	$ (4)	(5,316)			(5,320)
Shares withheld for employee taxes (in shares)		(364,000)
Other	114		114			114
Balances at end of period at Jun. 30, 2017	$ 1,915,902	$ 1,916	$ 4,113,249	$ (56,440)	$ (2,142,466)	$ 1,916,259	$ (357)
Balances at end of period (in shares) at Jun. 30, 2017	191,626,393	191,626,000