INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

INTANGIBLE ASSETS

As of December 31, 2018 and 2017, intangible assets that will continue to be amortized and those not amortized were:

	Weighted Average Amortization Period (years)	2018						2017
		Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Amortized intangible assets:
Water pumping rights	usage	$	1,084	$	112	$	972	$	1,084	$	108	$	976
Water planning studies	9	18,364		11,899		6,465		15,922		10,306		5,616
Leasehold improvements and other	17	1,519		882		637		1,426		804		622
Total		$	20,967	$	12,893	$	8,074	$	18,432	$	11,218	$	7,214
Unamortized intangible assets:
Perpetual water rights and other		$	3,776	$	—	$	3,776	$	3,780	$	—	$	3,780

Water pumping rights usage is the amount of water pumped from aquifers to be treated and distributed to customers.

For the year ended December 31, 2018 amortization of intangible assets was $1.7 million and for the years ended December 31, 2017 and 2016, amortization of intangible assets was $1.6 million. Estimated future amortization expense related to intangible assets for the succeeding 5 years is approximately $1.6 million in 2019, $1.1 million in 2020, $1.1 million in 2021, $0.9 million in 2022, $0.8 million in 2023, and $2.6 million thereafter.