BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Oil and Gas Properties
Discount rate for calculating present value of estimated future net revenues from proved reserves (as a percent)	10.00%
Impairment of oil and gas properties	$ 230,132	$ 603,599
Impairment of oil and gas properties, after tax	146,200
Receivables, net of allowance
Trade	61,591		$ 81,888
Oil and gas sales	124,189		136,537
Gas gathering, processing, and marketing	6,368		6,935
Other	12		38
Receivables, net	192,160		225,398
Accounts payable:
Trade	25,801		53,384
Gas gathering, processing, and marketing	13,440		13,431
Accounts payable	39,241		66,815
Accrued liabilities
Exploration and development	44,454		56,721
Taxes other than income	10,731		17,545
Other	174,602		173,242
Accrued liabilities	$ 229,787		$ 247,508

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.