INCOME TAXES AND DEFERRED TAXES INCOME TAXES AND DEFERRED TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax credit investments	$ 45,698		$ 45,698		$ 33,528
Unfunded commitments—tax credit investments	26,310		26,310		$ 18,306
Tax credits and other tax benefits recognized	1,137	$ 998	2,275	$ 1,996
Tax credit amortization expense included in provision for income taxes	915	$ 849	1,830	$ 1,658
Unrecognized Tax Benefits	$ 450		$ 450