Other Accrued Expenses Deferred Midstream Gathering Credits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Midstream Oil Gathering
Deferred Midstream Gathering Credits [Line Items]
Amortization of Other Deferred Charges	$ 0	$ 0	$ 0	$ 368
Midstream Gas Gathering
Deferred Midstream Gathering Credits [Line Items]
Amortization of Other Deferred Charges	2,014	2,038	5,343	4,499
Midstream Water Gathering
Deferred Midstream Gathering Credits [Line Items]
Amortization of Other Deferred Charges	$ 732	$ 686	$ 1,817	$ 1,458