Taxes Other Than Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 16,436	$ 14,969
Property [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	7,033	6,466
Gross Receipts, Excise And Franchise [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	3,122	3,220
Payroll [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	4,280	3,481
Regulatory Assessments [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	700	747
Pumping Fees [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	1,081	969
Other [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 220	$ 86