EARNINGS PER SHARE - Calculation of Basic and Diluted Weighted Average Shares Outstanding and Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							10 Months Ended	12 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Basic:
Net income (loss)	$ (259,613)		$ 17,138	$ 1,297	$ (6,461)					$ (247,639)
Net income attributable to participating securities										0
Net income (loss) attributable to common stock - basic										(247,639)
Diluted:
Net income (loss)	$ (259,613)		$ 17,138	$ 1,297	$ (6,461)					(247,639)
Net income attributable to participating securities										0
Net income (loss) attributable to common stock - diluted										$ (247,639)
Weighted average shares (denominator):
Weighted average shares - basic (in shares)										19,997
Dilutive effect of convertible notes (in shares)										0
Weighted average shares - diluted (in shares)										19,997
Basic income (loss) per share (in usd per share)	$ (12.98)		$ 0.86	$ 0.06	$ (0.32)					$ (12.38)
Diluted income (loss) per share (in usd per share)	$ (12.98)		$ 0.86	$ 0.06	$ (0.32)					$ (12.38)
Employee Stock Option
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)										0
Warrant
Weighted average shares (denominator):
Dilutive effect of warrants (in shares)										0
Predecessor
Basic:
Net income (loss)		$ 630,317				$ (116,406)	$ (89,635)	$ (195,761)	$ (188,784)		$ (590,586)	$ (1,090,915)
Net income attributable to participating securities		(4,995)									0	0
Net income (loss) attributable to common stock - basic		625,322									(590,586)	(1,090,915)
Diluted:
Net income (loss)		630,317				$ (116,406)	$ (89,635)	$ (195,761)	$ (188,784)		(590,586)	(1,090,915)
Net income attributable to participating securities		(4,995)									0	0
Net income (loss) attributable to common stock - diluted		$ 625,322									$ (590,586)	$ (1,090,915)
Weighted average shares (denominator):
Weighted average shares - basic (in shares)		5,634									5,591	5,525
Dilutive effect of convertible notes (in shares)		0									0	0
Weighted average shares - diluted (in shares)		5,634									5,591	5,525
Basic income (loss) per share (in usd per share)		$ 110.99				$ (20.76)	$ (16.01)	$ (35.05)	$ (33.89)		$ (105.63)	$ (197.45)
Diluted income (loss) per share (in usd per share)		$ 110.99				$ (20.76)	$ (16.01)	$ (35.05)	$ (33.89)		$ (105.63)	$ (197.45)
Predecessor | Employee Stock Option
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)		0									0	0
Predecessor | Warrant
Weighted average shares (denominator):
Dilutive effect of warrants (in shares)		0									0	0