INCOME TAXES AND DEFERRED TAXES INCOME TAXES AND DEFERRED TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax credit investments	$ 47,783		$ 47,783		$ 33,528
Unfunded commitments—tax credit investments	22,915		22,915		$ 18,306
Tax credits and other tax benefits recognized	1,114	$ 981	3,341	$ 2,943
Tax credit amortization expense included in provision for income taxes	915	$ 849	2,745	$ 2,507
Unrecognized Tax Benefits	$ 450		$ 450