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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of realized and unrealized gain (loss) on investment.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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INVESTMENT SECURITIES - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
INVESTMENT SECURITIES - Narrative (Details) - USD ($)	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, unrealized loss position, allowance for credit loss	$ 0		$ 0		$ 0
Investment securities gains	50,000	$ 271,000	71,000	$ 254,000
Gain on sale of investment securities	44,000
Investment securities	890,357,000		890,357,000		829,711,000
Investment securities gain (loss)		0		0
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged to secure public funds, fair value	645,000,000.0		645,000,000.0		$ 669,200,000
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities gains	50,000		71,000
Investment securities	$ 41,600,000		$ 41,600,000
Debt Securities \| Codorus Valley
Debt Securities, Available-for-sale [Line Items]
Investment securities		162,700,000		162,700,000
Equity Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities gains		271,000		$ 254,000
Gain on equity security		$ 181,000