Other Accrued Expenses Schedule of Other Accrued Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Schedule of Other Accrued Expense [Line Items]
Document Period End Date		Jun. 30, 2020
Amortization of Other Deferred Charges	$ 500	$ 1,000
Accrued Employee Benefits, Current	12,480	12,480	$ 21,611
Asset Retirement Obligation, Current	30,350	30,350	32,200
Accrued Environmental Loss Contingencies, Current	10,866	10,866	2,256
Operating and Finance Lease Liability, Current		9,602	5,926
Other accrued expenses	76,653	76,653	70,462
Current Liabilities
Schedule of Other Accrued Expense [Line Items]
Other Accrued Liabilities	13,355	13,355	8,469
Non Current Liabilities
Schedule of Other Accrued Expense [Line Items]
Other Accrued Liabilities	2,655	2,655	$ 3,337
Midstream Oil Gathering [Member]
Schedule of Other Accrued Expense [Line Items]
Amortization of Other Deferred Charges	900	1,700
MIdstream Water Gathering [Member]
Schedule of Other Accrued Expense [Line Items]
Amortization of Other Deferred Charges	400	800
Midstream Gas Gathering [Member]
Schedule of Other Accrued Expense [Line Items]
Amortization of Other Deferred Charges	300	400
SRC [Domain]
Schedule of Other Accrued Expense [Line Items]
Accrued Environmental Loss Contingencies, Current	$ 8,900	$ 8,900