PARENT COMPANY ONLY - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 26,618	$ 30,554	$ 19,222
Adjustments to reconcile net income to net cash provided by operating activities:
(Increase) decrease in other assets	(3,532)	186	(2,645)
(Decrease) increase in other liabilities	(589)	210	2,473
Net Cash Provided by Operating Activities	34,599	34,844	24,784
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of senior notes and subordinated debt	0	14,663	0
Repayment of subordinated debt	8,500	8,000	0
Dividends paid	(15,865)	(15,976)	(14,469)
Net Cash Provided by (Used in) Financing Activities	151,939	68,882	(56,469)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(48,150)	(169)	64,895
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(48,150)	(169)	64,895
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	95,848	96,017	31,122
CASH AND CASH EQUIVALENTS, END OF YEAR	47,698	95,848	96,017
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid	9,497	8,174	10,742
Parent Company
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	26,618	30,554	19,222
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion of purchase accounting adjustment	(14)	(43)	(38)
Amortization of debt issuance costs	170	101	0
Equity in (undistributed income) excess distributions of subsidiaries	(8,830)	(12,045)	17,797
(Increase) decrease in other assets	0	(29)	105
(Decrease) increase in other liabilities	(41)	(16)	13
Net Cash Provided by Operating Activities	17,903	18,522	37,099
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash used in business combination	0	0	(21,837)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of senior notes and subordinated debt	0	39,100	0
Repayment of subordinated debt	8,500	8,000	0
Proceeds from sale of treasury stock	160	212	131
Purchases of treasury stock	(9,349)	(7,586)	(163)
Dividends paid	(15,865)	(15,976)	(14,469)
Net Cash Provided by (Used in) Financing Activities	(33,554)	7,750	(14,501)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(15,651)	26,272	761
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(15,651)	26,272	761
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	33,518	7,246	6,485
CASH AND CASH EQUIVALENTS, END OF YEAR	17,867	33,518	7,246
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Investment of net assets acquired in business combination in Citizens & Northern Bank	0	0	73,426
Common equity issued in business combination	0	0	41,429
Subordinated debt assumed in business combination	0	0	10,091
Other liabilities assumed in business combination	0	0	69
Interest paid	$ 1,433	$ 1,567	$ 655