INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortized intangible assets:
Gross Carrying Value	$ 18,149	$ 17,440
Accumulated Amortization	10,108	8,702
Net Carrying Value	8,041	8,738
Unamortized intangible assets:
Perpetual water rights and other	3,776	3,778
Amortization of intangible assets	1,600	1,400	$ 1,400
Estimated future amortization expense related to intangible assets for the succeeding five years
2017	1,300
2018	1,300
2019	1,200
2020	1,000
2021	1,000
Thereafter	2,200
Water pumping rights
Amortized intangible assets:
Gross Carrying Value	1,084	1,084
Accumulated Amortization	105	98
Net Carrying Value	$ 979	986
Water planning studies
Amortized intangible assets:
Weighted Average Amortization Period	11 years
Gross Carrying Value	$ 15,734	14,824
Accumulated Amortization	9,307	7,859
Net Carrying Value	$ 6,427	6,965
Leasehold improvements and other
Amortized intangible assets:
Weighted Average Amortization Period	18 years
Gross Carrying Value	$ 1,331	1,532
Accumulated Amortization	696	745
Net Carrying Value	$ 635	$ 787