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	2 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended	12 Months Ended
	Feb. 28, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Basic:
Net income (loss)		$ (6,461)		$ (266,074)
Net income attributable to participating securities		0		0
Net loss attributable to common stock - basic		(6,461)		(266,074)
Diluted:
Net income (loss)		(6,461)		(266,074)
Net income attributable to participating securities		0		0
Net loss attributable to common stock - diluted		$ (6,461)		$ (266,074)
Weighted average shares (denominator):
Weighted average shares - basic (in shares)		19,997		19,997
Dilutive effect of convertible notes (in shares)		0		0
Weighted average shares - diluted (in shares)		19,997		19,997
Basic income (loss) per share (in usd per share)		$ (0.32)		$ (13.31)
Diluted income (loss) per share (in usd per share)		$ (0.32)		$ (13.31)
Employee Stock Option
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)		0		0
Warrant
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)		0		0
Restricted Stock
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)		0		0
Predecessor
Basic:
Net income (loss)	$ 630,317		$ (195,761)		$ (384,545)	$ (590,586)
Net income attributable to participating securities	(4,995)		0		0
Net loss attributable to common stock - basic	625,322		(195,761)		(384,545)
Diluted:
Net income (loss)	630,317		(195,761)		(384,545)	$ (590,586)
Net income attributable to participating securities	(4,995)		0		0
Net loss attributable to common stock - diluted	$ 625,322		$ (195,761)		$ (384,545)
Weighted average shares (denominator):
Weighted average shares - basic (in shares)	5,634		5,585		5,578
Dilutive effect of convertible notes (in shares)	0		0		0
Weighted average shares - diluted (in shares)	5,634		5,585		5,578
Basic income (loss) per share (in usd per share)	$ 110.99		$ (35.05)		$ (68.94)
Diluted income (loss) per share (in usd per share)	$ 110.99		$ (35.05)		$ (68.94)
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 stock options (in shares)	0		0		0
Predecessor | Restricted Stock
Weighted average shares (denominator):
Dilutive effect of stock options (in shares)	0		0		0