Leases (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Operating Lease, Payments			$ 659
Operating Lease, Cost			773
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 800	$ 2,500	3,325
Lease, Cost			27,383
Short-term Lease, Cost			36,202
Variable Lease, Cost			23,762
Amounts charged as dilling costs			(33,354)
Operating Lease, Liability, Current	847		847	$ 0
Operating Lease, Liability, Noncurrent	$ 2,232		$ 2,232	0
Operating Lease, Weighted Average Remaining Lease Term	4 years 1 month 6 days		4 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.97%		5.97%
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 847		$ 847
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	3,483		3,483
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(404)		(404)
Operating Lease, Right-of-Use Asset	2,740	2,500	2,740	0
Operating Lease, Liability	$ 3,079	$ 2,800	3,079
Operating Leases, Rent Expense, Net				$ 2,700	$ 1,000
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost			12,100
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost			14,500
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost			$ 800