Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Operating leases	$ 4,133	$ 10,875
Short-term leases	3,291	11,660
Financing leases
Depreciation of assets	231	671
Interest on lease liabilities	32	96
Total financing leases	263	767
Total lease expense	7,687	23,302
Lease operating
Lessee, Lease, Description [Line Items]
Operating leases	3,298	8,505
Short-term leases	2,317	7,918
Plant and other midstream services
Lessee, Lease, Description [Line Items]
Operating leases	30	91
Short-term leases	967	3,718
General and administrative
Lessee, Lease, Description [Line Items]
Operating leases	805	2,279
Short-term leases	7	24
Drilling Rig Leases
Financing leases
Gross payments	6,300	19,800
Drilling Rig Leases And Other Equipment Rentals
Financing leases
Gross payments	$ 24,700	$ 61,800