Leases (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset		$ 3,059	$ 2,500	$ 3,059	$ 0
Operating Lease, Payments				221
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		800	2,500	3,325
Operating Lease, Liability, Current		874		874	0
Operating Lease, Liability, Noncurrent		2,545		2,545	$ 0
Operating Lease, Liability		$ 3,419	$ 2,800	$ 3,419
Operating Lease, Weighted Average Remaining Lease Term		4 years 7 months 6 days		4 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent		5.97%		5.97%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 437		$ 437
Lessee, Operating Lease, Liability, Payments, Due Year Two		846		846
Lessee, Operating Lease, Liability, Payments, Due Year Three		830		830
Lessee, Operating Lease, Liability, Payments, Due Year Four		834		834
Lessee, Operating Lease, Liability, Payments, Due Year Five		833		833
Lessee, Operating Lease, Liability, Payments, Due after Year Five		139		139
Lessee, Operating Lease, Liability, Payments, Due		3,919		3,919
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(500)		(500)
Operating Lease, Cost		194		357
Short-term Lease, Cost		11,484		23,055
Variable Lease, Cost		5,548		10,643
Amounts charged as dilling costs	[1]	(10,790)		(21,641)
Lease, Cost	[2]	6,436		12,414
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		2,900		5,000
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		3,300		7,100
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		$ 200		$ 400
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		2 years		2 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		5 years		5 years

[1] ¹  Represents the combined gross amounts paid and (i) capitalized as drilling costs for our working interest share and (ii) billed to joint interest partners for their working interest share for short-term leases of operated drilling rigs.

[2] ²  Includes $2.9 million and $5.0 million recognized in Gathering, processing and transportation, $3.3 million and $7.1 million recognized in Lease operating and $0.2 million and $0.4 million recognized in G&A for the three and six months ended June 30, 2019, respectively.