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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2024
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 six-month periods ended June 30, 2024 and 2023: Six-Month Period Ended June 30, 2024 2023 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 889,642 $ 12.30 938,491 $ 9.14 Granted (1) 398,569 17.35 495,891 11.99 Forfeited (3,464) 13.30 (57,491) 11.29 Vested (253,504) 12.26 (481,536) 5.93 Unvested shares outstanding at end of period 1,031,243 $ 14.26 895,355 $ 12.31 (1) For the six-month period ended June 30, 2024, includes 2,280 shares of restricted stock awarded to independent directors and 396,289 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. For the six-month period ended June 30, 2023, includes 3,502 shares of restricted stock awarded to independent directors and 492,389 shares of restricted stock awarded to employees, of which 33,718 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] | Six-Month Period Ended June 30, 2024 2023 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 534,261 $ 12.25 791,923 $ 7.36 Additions (1) 165,487 18.39 216,876 12.24 Vested (2) (150,716) 11.26 (474,538) 4.08 Performance units at end of period 549,032 $ 14.37 534,261 $ 12.25 (1) Units granted during the six-month periods ended June 30, 2024 and 2023 are based on the achievement of the Relative TSR and TBVPS performance goals during a three-year performance cycle beginning January 1, 2024 and January 1, 2023, respectively, and ending on December 31, 2026 and December 31, 2025, respectively. (2) Units vested during the six-month periods ended June 30, 2024 and 2023 are related to performance units granted in 2021 and 2020, respectively, that met the pre-established target 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 of the Relative TSR component of the performance units granted under the Omnibus Plan during the six-month periods ended June 30, 2024 and 2023: Six-Month Period Ended June 30, 2024 2023 Risk-free interest rate (1) 4.41 % 3.98 % Correlation coefficient 73.80 77.16 Expected dividend yield (2) - - Expected volatility (3) 34.65 41.37 Expected life (in years) 2.78 2.79 (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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