OTHER COMPREHENSIVE INCOME - AOCI Changes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Summary of the AOCI balances, net of tax
Balance at beginning of period	$ 840,329	$ 837,709	$ 834,232	$ 823,323
Current Year Change	(7,611)	(435)	(23,528)	(1,946)
Balance at end of period	842,174	845,090	842,174	845,090
Accumulated Other Comprehensive Income
Summary of the AOCI balances, net of tax
Balance at beginning of period	(14,043)	6,998	1,874	8,509
Current Year Change			(23,528)	(1,946)
Balance at end of period	(21,654)	6,563	(21,654)	6,563
Unrealized gain (loss) on AFS debt securities
Summary of the AOCI balances, net of tax
Balance at beginning of period			890	7,571
Current Year Change			(23,535)	(1,982)
Balance at end of period	(22,645)	5,589	(22,645)	5,589
Unrealized gain (loss) on AFS debt security for which a portion of OTTI has been recognized in earnings
Summary of the AOCI balances, net of tax
Balance at beginning of period			984	938
Current Year Change			7	36
Balance at end of period	$ 991	$ 974	$ 991	$ 974