INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortized intangible assets:
Gross Carrying Value	$ 23,700	$ 21,078
Accumulated Amortization	15,447	13,955
Total	8,253	7,123
Unamortized intangible assets:
Perpetual water rights and other	3,867	3,776
Amortization of intangible assets	1,100	1,500	$ 1,700
Estimated future amortization expense related to intangible assets for the succeeding five years
2021	1,168
2022	1,055
2023	867
2024	726
2025	599
Thereafter	3,838
Total	8,253	7,123
Water pumping rights
Amortized intangible assets:
Gross Carrying Value	1,084	1,084
Accumulated Amortization	122	116
Total	962	968
Estimated future amortization expense related to intangible assets for the succeeding five years
Total	$ 962	968
Water planning studies
Amortized intangible assets:
Weighted Average Amortization Period (years)	12 years
Gross Carrying Value	$ 20,686	18,475
Accumulated Amortization	14,119	12,950
Total	6,567	5,525
Estimated future amortization expense related to intangible assets for the succeeding five years
Total	$ 6,567	5,525
Leasehold improvements and other
Amortized intangible assets:
Weighted Average Amortization Period (years)	21 years
Gross Carrying Value	$ 1,930	1,519
Accumulated Amortization	1,206	889
Total	724	630
Estimated future amortization expense related to intangible assets for the succeeding five years
Total	$ 724	$ 630