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ACQUISITIONS - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Acquisition	Dec. 31, 2020 USD ($) Acquisition	Dec. 31, 2019 USD ($) Acquisition	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Number of businesses acquired | Acquisition	1	2	1
Fair value of total consideration transferred	$ 333,000		$ 5,000,000.0
Goodwill and identifiable intangible assets	3,100,000	$ 2,900,000	5,800,000
Liabilities Assumed	0	0	0
Goodwill	36,212,000	33,103,000	30,208,000	$ 24,417,000
Goodwill impairment loss	0
Amortization of intangible assets	1,598,000	1,287,000	$ 1,043,000
Wealth Management Division [Member]
Business Acquisition [Line Items]
Goodwill	35,600,000
Banking Segment [Member]
Business Acquisition [Line Items]
Goodwill	$ 563,000
2020 Acquisitions [Member]
Business Acquisition [Line Items]
Company's acquisition equity		$ 0

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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