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FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables)
 9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Summary of Fair Value Measurements of Assets and Liabilities Recognized in the Balance Sheets Measured at Fair Value on Recurring Basis
The following table presents the fair value measurements of assets and liabilities recognized in the accompanying balance sheets on a recurring basis, along with their classification within the fair value hierarchy as of September 30, 2025, and December 31, 2024.

  Fair Value Measurements Using:
September 30, 2025Fair ValueQuoted Prices in Active Markets for Identical Assets
(Level 1)		Significant Other
Observable Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Available for sale securities:    
U.S. Government-sponsored agency securities$77,897 $— $77,897 $— 
State and municipal874,576 — 872,613 1,963 
U.S. Government-sponsored mortgage-backed securities423,338 — 423,338 — 
Foreign investment1,500 — 1,500 — 
Corporate obligations9,592 — 9,561 31 
Derivative assets50,722 — 50,722 — 
Derivative liabilities49,863 — 49,863 — 


  Fair Value Measurements Using:
December 31, 2024Fair ValueQuoted Prices in
Active Markets for
Identical Assets
(Level 1)		Significant Other Observable Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Available for sale securities:    
U.S. Government-sponsored agency securities$79,381 $— $79,381 $— 
State and municipal863,174 — 860,793 2,381 
U.S. Government-sponsored mortgage-backed securities431,622 — 431,618 4 
Corporate obligations12,298 — 12,267 31 
Derivative assets77,133 — 77,133 — 
Derivative liabilities76,568 — 76,568 — 
Summary of Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in the Balance Sheets using Significant Unobservable Level 3 Inputs
The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying
balance sheets using significant unobservable Level 3 inputs for the three and nine months ended September 30, 2025 and 2024.
 Available for Sale Securities
Three Months EndedNine Months Ended
 September 30, 2025September 30, 2024September 30, 2025September 30, 2024
Balance at beginning of the period$2,196 $3,224 $2,416 $3,310 
Included in other comprehensive income29 65 38 76 
Principal payments(231)(808)(460)(905)
Ending balance $1,994 $2,481 $1,994 $2,481 
Summary of Description of Valuation Methodologies Used for Instruments Measured at Fair Value on a Non-Recurring Basis and Recognized in the Balance Sheets
Following is a description of valuation methodologies used for instruments measured at fair value on a nonrecurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy at September 30, 2025, and December 31, 2024.
Fair Value Measurements Using
September 30, 2025Fair ValueQuoted Prices in
Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
Inputs
(Level 2)		Significant Unobservable
Inputs
(Level 3)
Collateral dependent loans$66,708 $— $— $66,708 


Fair Value Measurements Using
December 31, 2024Fair ValueQuoted Prices in
Active Markets for
Identical Assets
(Level 1)		Significant Other
Observable
 Inputs
(Level 2)		Significant Unobservable
Inputs
(Level 3)
Collateral dependent loans$46,810 $— $— $46,810 
Summary of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other than Goodwill
The following tables present quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at September 30, 2025 and December 31, 2024.

September 30, 2025Fair ValueValuation TechniqueUnobservable InputsRange (Weighted-Average)
State and municipal securities$1,963 Discounted cash flowMaturity/Call date
1 month to 5 years
   US Muni BQ curve
BBB
   Discount rate
3.4% - 5.7%
Weighted-average coupon
3.6%
Corporate obligations $31 Discounted cash flowRisk free rate
3 month CME Term SOFR plus 26bps
   plus premium for illiquidity (basis points)
plus 200bps
Weighted-average coupon
0%
Collateral dependent loans$66,708 Collateral based measurementsDiscount to reflect current market conditions and ultimate collectability
1% - 16%
  Weighted-average discount by loan balance
1.5%
December 31, 2024Fair ValueValuation TechniqueUnobservable InputsRange (Weighted-Average)
State and municipal securities$2,381 Discounted cash flowMaturity/Call date
1 month to 6 years
  US Muni BQ curve
BBB
  Discount rate
3.6% - 4.7%
Weighted-average coupon
3.6%
Corporate obligations and U.S. Government-sponsored mortgage-backed securities$35 Discounted cash flowRisk free rate
3 month CME Term
SOFR plus 26bps
   plus premium for illiquidity (basis points)
plus 200bps
Weighted-average coupon
0%
Collateral dependent loans$46,810 Collateral based measurementsDiscount to reflect current market conditions and ultimate collectability
0% - 16%
Weighted-average discount by loan balance
12.6%
Summary of Estimated Fair Values of Financial Instruments
The following tables present estimated fair values of the Corporation’s financial instruments not carried at fair value and the level within the fair value hierarchy in which the fair value measurements fall at September 30, 2025 and December 31, 2024.

September 30, 2025
Quoted Prices in Active Markets
for Identical
Assets		Significant
Other
Observable
Inputs		Significant Unobservable
Inputs
Carrying Amount(Level 1)(Level 2)(Level 3)Total Fair Value
Assets:
Cash and due from banks$88,079 $88,079 $— $— $88,079 
Interest-bearing deposits168,706 168,706 — — 168,706 
Investment securities held to maturity, net of allowance for credit losses1,995,488 — 1,702,443 4,621 1,707,064 
Loans held for sale23,190 — 23,190 — 23,190 
Net loans13,396,706 — — 13,306,141 13,306,141 
Federal Home Loan Bank stock47,264 — 47,264 — 47,264 
Interest receivable89,102 — 89,102 — 89,102 
Liabilities:
Deposits$14,869,979 $12,810,405 $2,058,720 $— 14,869,125 
Borrowings:
Federal funds purchased199,370 — 199,370 — 199,370 
Securities sold under repurchase agreements122,226 — 122,218 — 122,218 
Federal Home Loan Bank advances798,626 — 803,788 — 803,788 
Subordinated debentures and other borrowings57,632 — 53,537 — 53,537 
Interest payable18,240 — 18,240 — 18,240 
December 31, 2024
Quoted Prices in Active Markets
for Identical
Assets		Significant
Other
Observable
Inputs		Significant Unobservable
Inputs
Carrying Amount(Level 1)(Level 2)(Level 3)Total Fair Value
Assets:
Cash and due from banks$87,616 $87,616 $— $— $87,616 
Interest-bearing deposits298,891 298,891 — — 298,891 
Investment securities held to maturity, net2,074,220 — 1,716,647 6,873 1,723,520 
Loans held for sale18,663 — 18,663 — 18,663 
Net loans12,661,602 — — 12,437,523 12,437,523 
Federal Home Loan Bank stock41,690 — 41,690 — 41,690 
Interest receivable91,829 — 91,829 — 91,829 
Liabilities:
Deposits$14,521,626 $12,502,819 $2,010,348 $— 14,513,167 
Borrowings:
Securities sold under repurchase agreements142,876 — 142,865 — 142,865 
Federal Home Loan Bank advances822,554 — 816,786 — 816,786 
Subordinated debentures and other borrowings93,529 — 84,108 — 84,108 
Interest payable16,102 — 16,102 — 16,102