Leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessor, Lease, Description [Line Items]
Lease, Cost	$ 10.9
Operating Lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	8.10%
Property, Plant and Equipment [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	$ 4.7
Lease Operating Expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	3.1
Gathering and other expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	1.5
General and Administrative Expense [Member]
Lessor, Lease, Description [Line Items]
Lease, Cost	$ 1.6