CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 3,040	$ 8,119
Accounts receivable	58,464	78,214
Commodity derivative assets	96,278	14,790
Prepaid expenses and other current assets	1,995	1,168
TOTAL CURRENT ASSETS	159,777	102,291
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $1,073,475 and $1,073,447 at March 31, 2020 and December 31, 2019, respectively	3,291,755	3,302,340
Accumulated depreciation, depletion, amortization, and impairment	(1,938,773)	(1,870,412)
Oil and natural gas properties, net	1,352,982	1,431,928
Other property and equipment, net of accumulated depreciation of $11,792 and $11,622 at March 31, 2020 and December 31, 2019, respectively	2,132	2,300
NET PROPERTY AND EQUIPMENT	1,355,114	1,434,228
DEFERRED CHARGES AND OTHER LONG-TERM ASSETS	7,676	8,689
TOTAL ASSETS	1,522,567	1,545,208
CURRENT LIABILITIES
Accounts payable	563	5,309
Accrued liabilities	8,823	22,702
Commodity derivative liabilities	0	159
Other current liabilities	1,412	1,633
TOTAL CURRENT LIABILITIES	10,798	29,803
LONG–TERM LIABILITIES
Credit facility	388,000	394,000
Accrued incentive compensation	543	2,110
Commodity derivative liabilities	0	18
Asset retirement obligations	16,225	15,653
Other long-term liabilities	4,914	6,820
TOTAL LIABILITIES	420,480	448,404
COMMITMENTS AND CONTINGENCIES (Note 7)
EQUITY
Partners' equity – general partner interest	0	0
TOTAL EQUITY	803,726	798,443
TOTAL LIABILITIES, MEZZANINE EQUITY, AND EQUITY	1,522,567	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	$ 803,726	$ 798,443