PREMISES AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Premises and equipment [Abstract]
Premises and equipment, gross	$ 90,348	$ 89,215
Less accumulated depreciation and amortization	65,368	62,558
Net book value	24,980	26,657
Depreciation expense	3,437	3,703	$ 4,205
Rent expense	1,100	1,200	$ 1,200
Rent commitments, before considering renewal options [Abstract]
2019	897
2020	888
2021	886
2022	770
2023	620
2024 and thereafter	3,848
Total	7,909
Leases in premises and equipment [Abstract]
Buildings	5,572	5,572
Accumulated depreciation	(1,208)	(874)
Net book value	4,364	4,698
Schedule by year of future minimum lease payments under the capitalized lease [Abstract]
2019	367
2020	376
2021	388
2022	391
2023	391
2024 and thereafter	3,639
Total minimum lease payments	5,552
Less amount representing interest	1,248
Present value of net minimum lease payments	4,304
Land
Premises and equipment [Abstract]
Premises and equipment, gross	4,803	4,803
Buildings
Premises and equipment [Abstract]
Premises and equipment, gross	41,332	41,045
Projects in progress
Premises and equipment [Abstract]
Premises and equipment, gross	31	357
Equipment and furniture
Premises and equipment [Abstract]
Premises and equipment, gross	38,008	37,545
Leasehold improvements
Premises and equipment [Abstract]
Premises and equipment, gross	$ 6,174	$ 5,465