LONG-TERM BORROWINGS - Narrative (Details) - Revolving line of credit with the FHLB	Dec. 31, 2021 USD ($)
Jersey Shore State Bank
LONG-TERM BORROWINGS
Remaining borrowing capacity	$ 243,939,000
Outstanding letters of credit	40,200,000
Luzerne National Bank Corporation
LONG-TERM BORROWINGS
Remaining borrowing capacity	184,759,000
Outstanding letters of credit	$ 0

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant