Taxes Other Than Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 20,555	$ 15,201	$ 56,424	$ 45,038
Property [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	8,437	7,020	23,746	20,415
Gross Receipts, Excise And Franchise [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	4,023	3,423	10,724	10,181
Payroll [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	4,788	2,216	13,760	7,988
Regulatory Assessments [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	867	718	2,266	2,213
Pumping Fees [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	1,941	1,726	4,509	3,967
Other [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 499	$ 98	$ 1,419	$ 274