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FRESH-START ACCOUNTING - Adjustments Made To Successor Company Stock and Additional Paid-in Capital (Details) $ / shares in Units, $ in Thousands				3 Months Ended
	Oct. 08, 2019	Oct. 02, 2019 USD ($) $ / shares	Oct. 01, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Sep. 30, 2020 USD ($) shares	Jun. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 09, 2016 $ / shares
Fresh-Start Adjustment
Par value of 16,203,940 shares of new common stock issued to holders of senior note claims and existing equity interest claims (valued at $19.74per share) | $		$ 2			$ 2	$ 2
Fair Value of warrants issued to holder of the Existing Equity Interests | $		7,336	$ 7,336
Additional paid-in-capital (Successor) | $		322,294
Equity issuance costs | $		(2,503)	(2,503)	$ (13)	(19)
Total stockholders' equity | $		$ 327,129	$ 30,477	$ 431,577	$ 316,650	$ 152,790	$ 305,171	$ 148,431	$ 214,157	$ 853,663	$ 1,197,044
Common stock, shares issued | shares			16,203,940		16,203,940	16,203,967
Share Price | $ / shares			$ 19.74
Annualized Rate Of Increase To The Strike Price Of Warrants Issued	6.75	6.75
Warrants exercise price (in dollars per share) | $ / shares												$ 14.04
Measurement Input Implied Strike Price
Fresh-Start Adjustment
Warrants and Rights Outstanding, Measurement Input		19.74
Measurement Input, Initial Strike Price | Series A Warrants
Fresh-Start Adjustment
Warrants exercise price (in dollars per share) | $ / shares		$ 40.17
Measurement Input, Initial Strike Price | Series B Warrants
Fresh-Start Adjustment
Warrants exercise price (in dollars per share) | $ / shares		48.28
Measurement Input, Initial Strike Price | SeriesC Warrants [Member]
Fresh-Start Adjustment
Warrants exercise price (in dollars per share) | $ / shares		$ 60.45
Measurement Input, Price Volatility [Member]
Fresh-Start Adjustment
Warrants and Rights Outstanding, Measurement Input		45

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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