CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUE
Oil and condensate sales	$ 142,382	$ 163,538	$ 257,390
Natural gas and natural gas liquids sales	122,836	116,018	207,456
Gain (loss) on commodity derivative instruments	(36,464)	90,288	37,336
Lease bonus and other income	32,079	23,080	46,139
TOTAL REVENUE	260,833	392,924	548,321
OPERATING (INCOME) EXPENSE
Lease operating expense	18,755	21,583	21,233
Production costs and ad valorem taxes	35,464	35,767	49,575
Exploration expense	645	2,592	631
Depreciation, depletion and amortization	102,487	104,298	111,962
Impairment of oil and natural gas properties	6,775	249,569	117,930
General and administrative	73,139	77,175	62,765
Accretion of asset retirement obligations	892	1,075	1,060
(Gain) loss on sale of assets, net	(4,793)	(4,873)	32
Other expense	0	1,593	1,424
TOTAL OPERATING EXPENSE	233,364	488,779	366,612
INCOME (LOSS) FROM OPERATIONS	27,469	(95,855)	181,709
OTHER INCOME (EXPENSE)
Interest and investment income	656	58	28
Interest expense	(7,547)	(6,418)	(13,509)
Other income (expense)	(390)	910	959
TOTAL OTHER EXPENSE	(7,281)	(5,450)	(12,522)
NET INCOME (LOSS)	20,188	(101,305)	169,187
NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	12	1,260	0
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(5,763)	(7,522)	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	14,437	(108,017)	0
ALLOCATION OF INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	14,437	(108,017)	0
Predecessor
OTHER INCOME (EXPENSE)
NET INCOME (LOSS)	0	450	$ 169,187
Common Units
ALLOCATION OF INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of loss	$ 24,669	$ (54,326)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in usd per share)	$ 0.26	$ (0.56)
Weighted average units outstanding (basic)	96,073	96,182
Per unit (diluted) (in usd per share)	$ 0.26	$ (0.56)
Weighted average units outstanding (diluted)	96,243	96,182
DISTRIBUTIONS DECLARED AND PAID SUBSEQUENT TO INITIAL PUBLIC OFFERING:
Per unit (in usd per share)	$ 1.10	$ 0.424
Subordinated Units
ALLOCATION OF INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of loss	$ (10,232)	$ (53,691)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in usd per share)	$ (0.11)	$ (0.56)
Weighted average units outstanding (basic)	95,138	95,057
Per unit (diluted) (in usd per share)	$ (0.11)	$ (0.56)
Weighted average units outstanding (diluted)	95,138	95,057
DISTRIBUTIONS DECLARED AND PAID SUBSEQUENT TO INITIAL PUBLIC OFFERING:
Per unit (in usd per share)	$ 0.74	$ 0.424