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Fair Value Disclosures (Tables)
12 Months Ended
Dec. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following table presents assets and liabilities measured at fair value on a recurring basis (including items that are required to be measured at fair value) at December 31, 2025 and 2024.
Fair value measurements at December 31, 2025 using
Total fair valueQuoted prices
in active
markets for
identical
assets
(Level 1)
Significant
other
observable
inputs
(Level 2)
Significant
unobservable
inputs
(Level 3)
(dollars in thousands)
Assets:
Loans held for sale$54,119 $- $54,119 $- 
Available-for-sale investment securities:
U.S. government obligations and government-sponsored enterprises6,349,320 928,287 5,421,033 - 
Obligations of states and political subdivisions16,644 - 16,644 - 
Other securities6,499 1,018 5,481 - 
Equity investments48,200 - 36,690 11,510 
Derivatives7,969 - 7,969 - 
Total assets$6,482,752 $929,305 $5,541,937 $11,510 
Liabilities:
Derivatives$7,021 $- $7,021 $- 
Total liabilities$7,021 $- $7,021 $- 
Fair value measurements at December 31, 2024 using
Total fair valueQuoted prices
in active
markets for
identical
assets
(Level 1)
Significant
other
observable
inputs
(Level 2)
Significant
unobservable
inputs
(Level 3)
(dollars in thousands)
Assets:
Loans held for sale$34,264 $- $34,264 $- 
Available-for-sale investment securities:
U.S. government obligations and government-sponsored enterprises5,553,593 1,269,553 4,284,040 - 
Obligations of states and political subdivisions21,141 - 21,141 - 
Other securities28,989 614 28,375 - 
Equity investments48,770 724 36,765 11,281 
Trading666 - 666 - 
Derivatives10,312 - 10,312 - 
Total assets$5,697,735 $1,270,891 $4,415,563 $11,281 
Liabilities:
Derivatives$8,842 $- $8,842 $- 
Total liabilities$8,842 $- $8,842 $- 
Fair Value Measurements, Nonrecurring
The following table presents assets measured at fair value on a nonrecurring basis (including items that are required to be measured at fair value) at December 31, 2025 and 2024.
Fair value measurements at December 31, 2025 using
Total fair valueQuoted prices
in active
markets for
identical
assets
(Level 1)
Significant
other
observable
inputs
(Level 2)
Significant
unobservable
inputs
(Level 3)
(dollars in thousands)
Assets:
Collateral dependent loans$20,628 $- $- $20,628 
Mortgage servicing rights59,997 - - 59,997 
Total assets$80,625 $- $- $80,625 
Fair value measurements at December 31, 2024 using
Total fair valueQuoted prices
in active
markets for
identical
assets
(Level 1)
Significant
other
observable
inputs
(Level 2)
Significant
unobservable
inputs
(Level 3)
(dollars in thousands)
Assets:
Collateral dependent loans$15,376 $- $- $15,376 
Mortgage servicing rights60,339 - - 60,339 
Total assets$75,715 $- $- $75,715 
Schedule of Estimated Fair Values of the Company’s Financial Instruments
The estimated fair values of the Company’s financial instruments are as follows:
December 31, 2025
Carrying
amount
Estimated fair value
Level 1Level 2Level 3
(dollars in thousands)
Financial Assets
Cash and due from banks$258,588 $258,588 $- $- 
Short-term interest-bearing deposits1,805,215 1,805,215 - - 
Time deposits1,039 - - 1,039 
Federal funds sold and securities purchased under agreements to resell340 340 - - 
Investment securities
Available for sale6,372,463 929,305 5,443,158 - 
Held to maturity1,689 - 1,023 677 
Equity48,200 - 36,690 11,510 
Trading- - - - 
Net loans held for investment11,284,931 - - 11,285,348 
Loans held for sale54,119 - 54,119 - 
Derivatives7,969 - 7,969 - 
Total assets$19,834,553 $2,993,448 $5,542,959 $11,298,574 
December 31, 2024
Carrying
amount
Estimated fair value
Level 1Level 2Level 3
(dollars in thousands)
Financial Assets
Cash and due from banks$265,209 $265,209 $- $- 
Short-term interest-bearing deposits969,416 969,416 - - 
Time deposits699 - - 699 
Federal funds sold and securities purchased under agreements to resell7,183 7,183 - - 
Investment securities
Available for sale5,603,723 1,270,167 4,333,556 - 
Held to maturity3,225 - 2,554 677 
Equity48,770 724 36,765 11,281 
Trading666 - 666 - 
Net loans held for investment11,469,812 - - 11,283,393 
Loans held for sale34,264 - 34,264 - 
Derivatives10,312 - 10,312 - 
Total assets$18,413,279 $2,512,699 $4,418,117 $11,296,050 
December 31, 2025
Carrying
amount
Estimated fair value
Level 1Level 2Level 3
(dollars in thousands)
Financial Liabilities
Federal funds purchased and customer repurchase agreements$1,011,851 $1,011,851 $- $- 
Accrued interest payable9,306 9,306 - - 
Derivatives7,021 - 7,021 - 
December 31, 2024
Carrying
amount
Estimated fair value
Level 1Level 2Level 3
(dollars in thousands)
Financial Liabilities
Federal funds purchased and customer repurchase agreements$1,007,295 $1,007,295 $- $- 
Accrued interest payable10,291 10,291 - - 
Derivatives8,842 - 8,842 -