Plan of Reorganization, Percentage of Common Stock Issued in Reorganization to Existing Shareholders

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- Definition

Plan of Reorganization, Percentage of Warrants Issued in Reorganization

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Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

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Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP).

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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SHARE-BASED COMPENSATION - Additional Information (Details) - USD ($)			12 Months Ended			91 Months Ended
	Feb. 15, 2017	Dec. 14, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option granted (in shares)			0	0	0
Share-based compensation			$ 11,562,000	$ 17,917,000	$ 17,051,000
Share-based compensation capitalized into oil and gas properties			$ 3,117,000	$ 5,593,000	$ 5,797,000
Stock option granted (in shares)			0	0	0
Restricted stocks issued, shares (in shares)			31,313	141,872	67,305
Restricted stocks issued, value			$ 280,000	$ 23,722,000	$ 24,593,000
Unrecognized compensation cost, weighted-average period of recognition			1 year
Adjustments to additional paid-in capital related to net tax effect of stock options exercises and restricted stock vesting			$ 0	0	(54,000)
Net tax impact from stock option exercises and restricted stock vesting			$ 4,117,000	$ 1,314,000	$ 609,000
RSA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of common stock issued in reorganization to existing shareholders		5.00%
Percentage of warrants issued in reorganization (up to)		15.00%
RSA \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of common stock issued in reorganization to existing shareholders	5.00%
Percentage of warrants issued in reorganization (up to)	15.00%
2009 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option granted (in shares)						0
Restricted Stock \| 2009 plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock options			1 year
Restricted Stock \| 2009 plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock options			3 years
Non - Employee Directors \| 2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock options			3 years
Period after which stock option will expire subsequent to award			10 years
All Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost			$ 2,823,000			$ 2,823,000
All Employee \| 2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock options			5 years
Period after which stock option will expire subsequent to award			10 years
Executives \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost			$ 3,318,000			$ 3,318,000