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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2025
STOCK-BASED COMPENSATION [Abstract] |
Restricted Stock Activity Under Omnibus Plan [Table Text Block] | The following table summarizes the restricted stock activity under the Omnibus Plan during the nine-month periods ended September 30, 2025 and 2024: Nine-Month Period Ended September 30, 2025 2024 Number of Weighted- Number of Weighted- shares of Average shares of Average restricted Grant Date restricted Grant Date stock Fair Value stock Fair Value Unvested shares outstanding at beginning of year 1,007,621 $ 14.39 889,642 $ 12.30 Granted (1) 461,236 18.46 413,516 17.49 Forfeited (8,818) 16.27 (7,156) 13.69 Vested (423,729) 13.13 (276,558) 12.36 Unvested shares outstanding at end of period 1,036,310 $ 16.71 1,019,444 $ 14.38 (1) For the nine-month period ended September 30, 2025, includes 15,691 shares of restricted stock awarded to independent directors and 445,545 shares of restricted stock awarded to employees, of which 103,560 shares were granted to retirement-eligible employees and thus charged to earnings as of the grant date. For the nine-month period ended September 30, 2024, includes 16,448 shares of restricted stock awarded to independent directors and 397,068 shares of restricted stock awarded to employees, of which 84,122 shares were granted to retirement-eligible employees and thus charged to earnings as of the grant date.
Summary Of Performance Units Activity [Table Text Block] | Nine-Month Period Ended September 30, 2025 2024 Number Weighted- Number Weighted- of Average of Average Performance Grant Date Performance Grant Date Units Fair Value Units Fair Value Performance units at beginning of year 549,032 $ 14.37 534,261 $ 12.25 Additions (1) 160,744 18.66 165,487 18.39 Vested (2) (166,669) 13.15 (150,716) 11.26 Performance units at end of period 543,107 $ 16.01 549,032 $ 14.37 (1) Units granted during the nine-month periods ended September 30, 2025 and 2024 are based on the achievement of the Relative TSR and TBVPS performance goals during a three- year performance cycle beginning January 1, 2025 and January 1, 2024, respectively, and ending on December 31, 2027 and December 31, 2026, respectively. (2) Units vested during the nine-month periods ended September 30, 2025 and 2024 are related to performance units granted in 2022 and 2021, respectively, that met the pre- established targets and were settled with shares of common stock reissued from treasury shares.
Summary Of Valuation Assumptions [Table Text Block] | The following table summarizes the valuation assumptions used to calculate the fair value as of the grant date of the Relative TSR component of the performance units granted under the Omnibus Plan during the nine-month periods ended September 30, 2025 and 2024: Nine-Month Period Ended September 30, 2025 2024 Risk-free interest rate (1) 3.92 % 4.41 % Correlation coefficient 74.96 73.80 Expected dividend yield (2) - - Expected volatility (3) 31.94 34.65 Expected life (in years) 2.79 2.78 (1) Based on the yield on zero-coupon U.S. Treasury Separate Trading of Registered Interest and Principal of Securities as of the grant date for a period equal to the simulation term. (2) Assumes that dividends are reinvested at each ex-dividend date. (3) Calculated based on the historical volatility of the Corporation's stock price with a look-back period equal to the simulation term using daily stock prices.

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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (e)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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