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SHARE-BASED COMPENSATION PLANS - Summary of Outstanding Stock Options Activity (Details) - Employee Stock Option - Codorus Valley $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options exercisable, Weighted average remaining contractual life (in years) |  | 1 year 11 months 1 day
Shares |  |
Outstanding at beginning of year (in shares) | shares | 0 |
Assumed from Merger (in shares) | shares | 80,227 |
Granted (in shares) | shares | 0 |
Exercised (in shares) | shares | (6,859) |
Forfeited (in shares) | shares | 0 |
Expired (in shares) | shares | 0 |
Outstanding at end of period (in shares) | shares | 73,368 | 73,368
Fully vested and expected to vest (in shares) | shares | 73,368 | 73,368
Exercisable at end of period (in shares) | shares | 73,368 | 73,368
Weighted Average Exercise Price |  |
Outstanding at beginning of year (in usd per share) | $ / shares | $ 0 |
Assumed from Merger (in usd per share) | $ / shares | 21.96 |
Granted (in usd per share) | $ / shares | 0 |
Exercised (in usd per share) | $ / shares | 18.12 |
Forfeited (in usd per share) | $ / shares | 0 |
Expired (in usd per share) | $ / shares | 0 |
Outstanding at end of period (in usd per share) | $ / shares | 22.32 | $ 22.32
Fully vested and expected to vest (in usd per share) | $ / shares | 22.32 | 22.32
Exercisable at period end (in usd per share) | $ / shares | $ 22.32 | $ 22.32
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] |  |
Total intrinsic value of options exercised | $ |  | $ 110
Cash received from options exercised | $ |  | 124
Tax benefit realized from stock options exercised | $ |  | $ 6

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