INCOME TAXES Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred tax asset, increase (decrease), amount		$ 800
Net deferred income tax liabilities	$ 29,146		$ 29,015
Operating loss carryforwards, subject to expiration	8,000		8,000
Goodwill and intangible assets	21,800
Tax deferred income	700		600
Deferred tax liabilities, other			21,700
Regulatory assets and liabilities			100
Unrecognized tax benefits	1,400		1,400
Penalties and interest expense	100
Penalties and interest accrued	$ 1,400		$ 1,300