Contingencies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
The Water Works and Sewer Board of the City of Gadsden [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 10
The Water Works and Sewer Board of the Town of Centre [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	10
Brenda Bridgeman [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	50
Danny and Pamela Atkins [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 50