Leases (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset		$ 2,451	$ 0
Operating Lease, Payments		39
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		2,572
Operating Lease, Liability, Current		689	0
Operating Lease, Liability, Noncurrent		2,109	$ 0
Operating Lease, Liability		$ 2,798
Operating Lease, Weighted Average Remaining Lease Term		4 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent		5.96%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 516
Lessee, Operating Lease, Liability, Payments, Due Year Two		667
Lessee, Operating Lease, Liability, Payments, Due Year Three		647
Lessee, Operating Lease, Liability, Payments, Due Year Four		647
Lessee, Operating Lease, Liability, Payments, Due Year Five		644
Lessee, Operating Lease, Liability, Payments, Due after Year Five		108
Lessee, Operating Lease, Liability, Payments, Due		3,229
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(431)
Operating Lease, Cost		163
Short-term Lease, Cost		11,571
Variable Lease, Cost		5,095
Amounts charged as dilling costs	[1]	(10,851)
Lease, Cost	[2]	5,978
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		2,100
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		3,700
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		$ 200
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		2 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		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 $2.1 million recognized in Gathering, processing and transportation, $3.7 million recognized in Lease operating and $0.2 million recognized in G&A.