v3.26.1
Investments (Tables)
6 Months Ended
Jun. 30, 2026
Investments [Abstract]  
Debt Securities, Available-for-sale
The aggregate carrying and approximate fair values of investment securities follow (in thousands).  Fair values are based on quoted market prices, where available.  If quoted market prices are not available, fair values are based on quoted market prices of comparable financial instruments.

June 30, 2026December 31, 2025
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair ValueAmortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Securities available-for-sale:
Obligations of states and
political subdivisions$185,915 $905 $9,486 $177,334 $189,276 $538 $10,090 $179,724 
Mortgage-backed securities:
U.S. government agencies1,371,095 2,395 99,894 1,273,596 1,387,057 7,836 97,104 1,297,789 
Private label5,055  72 4,983 5,068 — 36 5,032 
Trust preferred securities4,616  78 4,538 4,612 — 188 4,424 
Corporate securities16,630 203 559 16,274 16,708 172 491 16,389 
Total Securities Available-for-Sale$1,583,311 $3,503 $110,089 $1,476,725 $1,602,721 $8,546 $107,909 $1,503,358 
Gross Unrealized Losses And Fair Value Of Investments The following table shows the gross unrealized losses and fair value of the Company’s investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
June 30, 2026
Less Than Twelve MonthsTwelve Months or GreaterTotal
Estimated Fair ValueUnrealized LossEstimated Fair ValueUnrealized LossEstimated Fair ValueUnrealized Loss
Securities available-for-sale:
Obligations of states and political subdivisions$5,612 $57 $122,499 $9,429 $128,111 $9,486 
Mortgage-backed securities:
U.S. Government agencies267,591 1,870 759,466 98,024 1,027,057 99,894 
     Private label  4,983 72 4,983 72 
Trust preferred securities   4,538 78 4,538 78 
Corporate securities  14,391 559 14,391 559 
Total available-for-sale$273,203 $1,927 $905,877 $108,162 $1,179,080 $110,089 
December 31, 2025
Less Than Twelve MonthsTwelve Months or GreaterTotal
Estimated Fair ValueUnrealized LossEstimated Fair ValueUnrealized LossEstimated Fair ValueUnrealized Loss
Securities available-for-sale:
Obligations of states and political subdivisions$4,746 $29 $129,347 $10,061 $134,093 $10,090 
Mortgage-backed securities:
U.S. Government agencies48,555 140 803,686 96,964 852,241 97,104 
Private label— — 5,032 36 5,032 36 
Trust preferred securities4,424 188 — — 4,424 188 
Corporate securities— — 14,559 491 14,559 491 
Total available-for-sale$57,725 $357 $952,624 $107,552 $1,010,349 $107,909 
Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity
The amortized cost and estimated fair value of debt securities at June 30, 2026, by contractual maturity, is shown in the following table (in thousands).  Expected maturities will differ from contractual maturities because the issuers of the securities
may have the right to prepay obligations without prepayment penalties.  Mortgage-backed securities have been allocated to their respective maturity groupings based on their contractual maturity.

Amortized CostEstimated Fair Value
Available-for-Sale Debt Securities
Due in one year or less$11,206 $11,152 
Due after one year through five years136,577 131,964 
Due after five years through ten years274,754 260,776 
Due after ten years1,160,774 1,072,833 
Total$1,583,311 $1,476,725 
Gross Gains And Losses Realized
Proceeds from sales, gross gains and gross losses recognized by the Company from investment security transactions are summarized in the table below (in thousands):
Three months ended June 30,
Six months ended June 30,
2026
2025
20262025
Proceeds on sales of available for sale securities$ $14,882 $ $14,882 
Gross realized gains on available for sale securities sold$ $237 $ $237 
Gross realized losses on available for sale securities sold (87) (87)
Net realized available for sale securities gains (losses) $ $150 $ $150 
Gross unrealized gains recognized on equity securities still held$109 $26 $99 $62 
Gross unrealized losses recognized on equity securities still held(51)(289)(34)(330)
Net unrealized (losses) gains recognized on equity securities still held$58 $(263)$65 $(268)