GOODWILL - Goodwill, intangible assets and related accumulated amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	May 15, 2020	Dec. 31, 2018
Goodwill [Line Items]
Goodwill	$ 24,191	$ 19,686	$ 4,500	$ 24,811
Impairment		(1,572)
Other intangibles	4,593	4,540
Reclass of goodwill held for sale		(3,553)
Less accumulated amortization on other intangibles	(4,526)	(4,512)
Other intangible assets, net	67	28
Amortization of intangible assets	14	374
Finite-Lived Intangible Assets:
2021	17
Thereafter	50
Other intangible assets, net	67	28
Capital Management
Goodwill [Line Items]
Impairment		(1,600)
Reclass of goodwill held for sale		$ 3,600
Amount of retired intangible assets	$ 4,800