Long-Term Water Assets - Revenues and Cost of Sales (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($) acre ft	Mar. 31, 2018 USD ($) acre ft
Goodwill and Intangible Assets Disclosure [Abstract]
Acre-Feet Sold (in acre-feet) \| acre ft	4,445	7,442
Revenues	$ 5,026	$ 7,992
Cost of sales	3,194	3,679
Profit	$ 1,832	$ 4,313

Cost of water purchased, may include any water related assessment. If water is bought on a unit volume basis, would also be considered as commodity costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration