CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 3 months ended Mar. 31, 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	$ 7,774		7,774			7,774
Net income (loss)	(126,361)				(126,304)	(126,304)	(57)
Issuance of common stock under Associate Stock Purchase Plan	599	$ 1	598			599
Issuance of common stock under Associate Stock Purchase Plan (in shares)		50,000
Restricted stock, net		$ 20	(20)
Restricted stock, net (in shares)		2,052,000
Shares withheld for employee taxes	(5,112)	$ (3)	(5,109)			(5,112)
Shares withheld for employee taxes (in shares)		(349,000)
Balances at end of period at Mar. 31, 2017	$ 1,954,632	$ 1,918	$ 4,105,640	$ (56,440)	$ (2,096,179)	$ 1,954,939	$ (307)
Balances at end of period (in shares) at Mar. 31, 2017	191,798,950	191,799,000