LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) customer borrower	Dec. 31, 2024 USD ($) loan borrower
Financing Receivable, Allowance for Credit Losses [Line Items]
Risk review of commercial relationships with committed loan balance amount (exceeds)	$ 2,000,000.0
Amount of loans reviewed that require approval	$ 500,000
Period past due when loans are deemed impaired	90 days
Appraisals, required period interval	18 months
Minimum amount on which annual updated appraisals for criticized loans are required	$ 250,000
Percentage of strong loan-to-value	70.00%
Interest income	$ 0	$ 0
Nonaccrual loan	$ 28,031,000	$ 24,111,000
Number of borrowers experiencing financial difficulty that were given contract modifications | borrower	5	8
Financing receivable, previously modified, commitment to extend, number of customer | customer	1
Loans modified	$ 777,000	$ 4,766,000
Commercial and land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Modified loans to borrowers experiencing financial difficulty, amortized cost	4,700,000
Loans modified	4,600,000
Owner-occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified	74,000
Payment Delay
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified	0	0
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Nonaccrual loan	3,860,000	5,500,000
Loans modified		66,000
Commercial and industrial | Payment Delay
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified		0
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, excluding accrued interest, modified, accumulated	350,000
Financing receivable, excluding accrued interest, modified, increase (decrease) from modification	300,000
Commercial Real Estate | Owner-occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Nonaccrual loan	5,128,000	4,278,000
Loans modified	777,000	0
Commercial Real Estate | Payment Delay | Owner-occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified	0	0
90 Days or More Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, excluding accrued interest, modified, accumulated	4,700,000
Loans modified	0	0
90 Days or More Past Due | Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified		0
90 Days or More Past Due | Commercial Real Estate | Owner-occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified	$ 0	$ 0
Codorus Valley
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of financing receivable, modifications, loans acquired | loan		3
Commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Nonaccrual principal, payoff		$ 1,600,000
Nonaccrual loan		13,400,000
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified		$ 150,000
Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum percentage of loan-to-value ratio upon loan origination (no more than)	80.00%
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral (no greater than)	85.00%