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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2023
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, 2023 and 2022: Six-Month Period Ended Six-Month Period Ended June 30, 2023 June 30, 2022 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 938,491 $ 9.14 1,148,775 $ 6.61 Granted (1) 495,891 11.99 301,440 13.15 Forfeited (57,491) 11.29 (10,364) 8.82 Vested (481,536) 5.93 (487,198) 5.72 Unvested shares outstanding at end of period 895,355 $ 12.31 952,653 $ 9.11 (1) Includes for the six-month period ended June 30, 2023, 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. Includes for the six-month period ended June 30, 2022, 3,048 shares of restricted stock awarded to independent directors and 298,392 shares of restricted stock awarded to employees, of which 6,084 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 Six-Month Period Ended June 30, 2023 June 30, 2022 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 791,923 7.36 814,899 7.06 Additions (1) 216,876 12.24 166,669 13.15 Vested (2) (474,538) 4.08 (189,645) 11.16 Performance units at end of period 534,261 12.25 791,923 7.36 (1) Units granted during the six-month periods ended June 30, 2023 are subject to the achievement of the Relative TSR and TBVPS performance goals during a three-year performance cycle beginning January 1, 2023 and ending on December 31, 2025. Units granted during the six-month period ended June 30, 2022 are subject to the achievement of the TBVPS performance goal during a three-year performance cycle beginning January 1, 2022 and ending on December 31, 2024. (2) Units vested during the six-month period ended June 30, 2023 are related to performance units granted in 2020 that met certain pre-established targets and were settled with shares of common stock reissued from treasury shares. Units vested during the six-month period ended June 30, 2022 are related to performance units granted in 2019 that met certain pre- established targets and were settled with shares of common stock reissued from treasury shares.
Summary Of Valuation Assumptions [Table Text Block] | Six-Month Period Ended June 30, 2023 Risk-free interest rate (1) 3.98 % Correlation coefficient 77.16 Expected dividend yield (2) - Expected volatility (3) 41.37 Expected life (in years) 2.79 (1) Based on the yield on zero-coupon U.S. Treasury STRIPS as of the grant date. (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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