DEBT - Additional Information (Details)											12 Months Ended
	Dec. 14, 2016 USD ($)	Jun. 14, 2016 USD ($)	Jun. 13, 2016 USD ($)	Jun. 10, 2016 $ / shares	May 27, 2016	May 13, 2016 USD ($)	Nov. 20, 2015 USD ($) instalment	Nov. 27, 2013 USD ($)	Nov. 08, 2012 USD ($)	Mar. 06, 2012 USD ($)	Dec. 31, 2016 USD ($) instalment $ / shares shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Feb. 23, 2017 USD ($)	Dec. 16, 2016	Nov. 15, 2016 USD ($)	Sep. 30, 2016 USD ($)	Apr. 13, 2016 USD ($)	Jun. 24, 2014 USD ($)	Nov. 30, 2013	Dec. 31, 2012 USD ($)	Nov. 30, 2012
Debt Instrument [Line Items]
Current portion of long-term debt											$ 408,000	$ 0
Write-off of deferred financing costs and associated unamortized discounts and premiums											8,332,000	0	$ 0
Legal and financial advisory costs											2,615,000
Outstanding borrowing											$ 341,500,000							$ 457,000,000
Repayments of lines of credit		$ 56,845,000
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant											6.90
Long-term debt, weighted average interest rate											3.20%
Consolidated EBITDA to consolidated Net Interest Expense		2.5									3.24
Percentage of aggregate principal amount owned	100.00%
Stock split, conversion ratio				0.1	0.1						100.0
Accrued interest payment											$ 809,000	9,022,000
Total interest cost incurred											91,092,000	85,267,000	84,577,000
Interest expense											$ 64,458,000	43,928,000	38,855,000
Subsequent Event
Debt Instrument [Line Items]
Outstanding borrowing														$ 341,500,000
Minimum
Debt Instrument [Line Items]
Percentage of borrowing base utilization											1.50%
Maximum
Debt Instrument [Line Items]
Percentage of borrowing base utilization											2.50%
Period One
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant		5.25
Period Two
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant		6.50
Period Three
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant		9.50
Period Four
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant		3.75
Building Loan
Debt Instrument [Line Items]
Current portion of long-term debt																	$ 408,000
Aggregate principal amount of senior notes							$ 11,802,000
Number of monthly installments | instalment							180
Senior convertible note, stated interest rate							4.20%
Monthly installment payment							$ 73,000
EBITDA to Net Interest Expense ratio							2.00				3.24
1.75% Senior Convertible Notes due 2017
Debt Instrument [Line Items]
Aggregate principal amount of senior notes										$ 300,000,000											$ 300,000,000
Senior convertible note, stated interest rate																					1.75%
Initial conversion rate of common stock				0.0023449						0.0234449
Initial conversion price of convertible note 2017 (in usd per share) | $ / shares				$ 426.50							$ 42.65
Closing share price (in usd per share) | $ / shares											$ 7.15
Convertible notes principal amount											$ 1,000
Number of consecutive trading day											25 days
Cash share holders receive for each dollar in principle											$ 1,000
Payment for call option											$ 70,830,000
Anti-dilution adjustments for purchases of call option (in shares) | shares											703,347
Strike price per share (in usd per share) | $ / shares											$ 559.10
Proceeds from sold warrants											$ 40,170,000
Interest expense related to amortization of discount											15,407,000	15,019,000	13,951,000
Amortization of deferred financing costs											1,471,000	1,434,000	1,332,000
Interest expense related to contractual interest coupon of convertible notes											$ 5,010,000	5,250,000	$ 5,250,000
Effective interest rates											7.51%									7.04%		7.75%
Liabilities Subject to Compromise, Debt and Accrued Interest										$ 300,000,000
Interest expense	$ 0
1.75% Senior Convertible Notes due 2017 | Other Assets
Debt Instrument [Line Items]
Unamortized deferred financing costs											$ 2,761,000	2,845,000
7.5% Senior Notes due 2022
Debt Instrument [Line Items]
Aggregate principal amount of senior notes								$ 475,000,000	$ 300,000,000
Proceeds from issuance of senior notes								$ 480,195,000	$ 293,203,000
Effective interest rates								3.00%
Accrued interest payment																$ 29,063,000
Grace period to make interest payment											30 days
Liabilities Subject to Compromise, Debt and Accrued Interest											$ 775,000,000
Interest expense	0
7.5% Senior Notes due 2022 | Minimum
Debt Instrument [Line Items]
Percentage of minimum principal amount before an event of default											25.00%
Bank Debt
Debt Instrument [Line Items]
Current portion of long-term debt																		175,269,000
Base borrowing and credit facility	150,000,000																		$ 900,000,000
Borrowing base	200,000,000	$ 360,000,000																300,000,000	$ 500,000,000
Outstanding borrowing under bank credit facility											$ 12,469,000							$ 18,269,000
Period in which outstanding amount has to be repaid to cure deficiency											10 days
Period in which bank has to add new properties to borrowing base and has to grant mortgage to banks											30 days
Number of monthly installments | instalment											6
Repayments of lines of credit			$ 29,212,000			$ 29,212,000
Line of Credit Facility, Line of credit facility, minimum liquidity requirement Liquidity Requirement		125,000,000
Line of credit facility, limitations on capital expenditures		60,000,000
Line of credit facility, amount of cash to which anti-hoarding cash provisions apply		50,000,000
Initial bank and availability under facility											$ 6,031,000
Oil and gas reserve as proportion of discounted present value of future net cash flow, for mortgage, percent											86.00%
Minimum pro rata share of commitments	25,000,000
Interest expense	$ 0
Bank Debt | Subsequent Event
Debt Instrument [Line Items]
Outstanding borrowing under bank credit facility														12,469,000
Initial bank and availability under facility														$ 6,031,000
Bank Debt | Minimum
Debt Instrument [Line Items]
Percentage of borrowing base utilization	3.00%
Bank Debt | Maximum
Debt Instrument [Line Items]
Percentage of borrowing base utilization	4.00%
Bank Debt | Uncompleted Wells Equipment and Facilities
Debt Instrument [Line Items]
Line of credit facility, limitations on capital expenditures		$ 25,000,000
Bank Debt | Period One | Minimum
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant															2.50
Bank Debt | Period Two | Maximum
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant															3.00
Bank Debt | Period Three | Minimum
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant															2.50
Bank Debt | Period Four | Maximum
Debt Instrument [Line Items]
Consolidated Funded Debt to consolidated EBITDA financial ratio covenant															3.50
Convertible Debt | Notes Due Two Thousand Seventeen
Debt Instrument [Line Items]
Senior convertible note, stated interest rate											1.75%
Liabilities Subject to Compromise, Debt and Accrued Interest											$ 300,000,000
Senior Convertible Notes Due Two Thousand Seventeen And Two Thousand And Twenty Two
Debt Instrument [Line Items]
Unamortized deferred financing costs											$ 63,000	$ 6,869,000