CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 1,600	$ 8,119
Accounts receivable	45,480	78,214
Commodity derivative assets	45,522	14,790
Assets held for sale	126,491	0
Prepaid expenses and other current assets	2,329	1,168
TOTAL CURRENT ASSETS	221,422	102,291
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $946,232 and $1,073,447 at June 30, 2020 and December 31, 2019, respectively	3,156,657	3,302,340
Accumulated depreciation, depletion, amortization, and impairment	(1,947,455)	(1,870,412)
Oil and natural gas properties, net	1,209,202	1,431,928
Other property and equipment, net of accumulated depreciation of $11,963 and $11,622 at June 30, 2020 and December 31, 2019, respectively	1,969	2,300
NET PROPERTY AND EQUIPMENT	1,211,171	1,434,228
DEFERRED CHARGES AND OTHER LONG-TERM ASSETS	6,245	8,689
TOTAL ASSETS	1,438,838	1,545,208
CURRENT LIABILITIES
Accounts payable	2,870	5,309
Accrued liabilities	10,337	22,702
Commodity derivative liabilities	311	159
Other current liabilities	1,634	1,633
TOTAL CURRENT LIABILITIES	15,152	29,803
LONG–TERM LIABILITIES
Credit facility	323,000	394,000
Accrued incentive compensation	580	2,110
Commodity derivative liabilities	4,738	18
Asset retirement obligations	16,717	15,653
Other long-term liabilities	4,609	6,820
TOTAL LIABILITIES	364,796	448,404
COMMITMENTS AND CONTINGENCIES (Note 7)
EQUITY
Partners' equity – general partner interest	0	0
TOTAL EQUITY	775,681	798,443
TOTAL LIABILITIES, MEZZANINE EQUITY, AND EQUITY	1,438,838	1,545,208
Series B Cumulative Convertible Preferred Units
MEZZANINE EQUITY
Partners' equity – convertible preferred units	298,361	298,361
Common Units
EQUITY
Partners' equity - units	$ 775,681	$ 798,443