PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)
PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE
Premises and fixed assets, gross	$ 86,213,000	$ 85,124,000
Less: accumulated depreciation and amortization	(41,345,000)	(38,375,000)
Premises and fixed assets, net	44,868,000	46,749,000
Depreciation and amortization	6,700,000	$ 7,400,000	$ 6,500,000
Company's premises held for sale	$ 0
Number of real estate properties utilized | property	1
Premises held for investment transferred to held for sale	$ 905,000		$ 2,799,000
Number of real estate properties, sold | property		1
Proceeds from sale of real estate		$ 1,900,000
Gain on sale		1,400,000
Land
PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE
Premises and fixed assets, gross	10,824,000	10,824,000
Buildings
PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE
Premises and fixed assets, gross	21,173,000	21,688,000
Leasehold improvements
PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE
Premises and fixed assets, gross	28,307,000	26,862,000
Furniture, fixtures and equipment
PREMISES AND FIXED ASSETS, NET AND PREMISES HELD FOR SALE
Premises and fixed assets, gross	$ 25,909,000	$ 25,750,000