Leases - Components of Lease Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating leases	$ 3,082
Short-term leases	3,841
Financing leases
Depreciation of assets	209
Interest on lease liabilities	31
Total financing leases	240
Total lease expense	7,163
Lease operating
Lessee, Lease, Description [Line Items]
Operating leases	2,242
Short-term leases	2,209
Plant and other midstream services
Lessee, Lease, Description [Line Items]
Operating leases	31
Short-term leases	1,620
General and administrative
Lessee, Lease, Description [Line Items]
Operating leases	809
Short-term leases	12
Drilling Rig Leases
Financing leases
Gross payments	5,300
Drilling Rig Leases And Other Equipment Rentals
Financing leases
Gross payments	$ 26,500