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Securities (Tables)
 9 Months Ended
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of available-for-sale debt securities
The following tables summarize available-for-sale debt securities held by the Company at September 30, 2025 and December 31, 2024:
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
September 30, 2025
U.S. Treasuries$55,405 $222 $2,194 $53,433 
Obligations of U.S. Government sponsored entities363,764 5,989 12,753 357,000 
Obligations of U.S. states and political subdivisions81,888 10 5,632 76,266 
Mortgage-backed securities – residential, issued by
 U.S. Government agencies104,338 643 3,702 101,279 
 U.S. Government sponsored entities772,888 5,474 77,731 700,631 
U.S. corporate debt securities2,500 0 56 2,444 
Total available-for-sale debt securities$1,380,783 $12,338 $102,068 $1,291,053 
December 31, 2024
U.S. Treasuries$75,141 $140 $3,784 $71,497 
Obligations of U.S. Government sponsored entities398,648 2,008 20,376 380,280 
Obligations of U.S. states and political subdivisions86,328 4 8,638 77,694 
Mortgage-backed securities – residential, issued by
U.S. Government agencies68,130 3 4,879 63,254 
U.S. Government sponsored entities736,376 1,680 101,696 636,360 
U.S. corporate debt securities2,500 0 53 2,447 
Total available-for-sale debt securities$1,367,123 $3,835 $139,426 $1,231,532 
Schedule of held-to-maturity securities
The following tables summarize held-to-maturity debt securities held by the Company at September 30, 2025 and December 31, 2024:
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
September 30, 2025
U.S. Treasuries$85,885 $0 $7,646 $78,239 
Obligations of U.S. Government sponsored entities226,625 0 23,240 203,385 
Total held-to-maturity debt securities$312,510 $0 $30,886 $281,624 
December 31, 2024
U.S. Treasuries$86,049 $0 $11,361 $74,688 
Obligations of U.S. Government sponsored entities226,413 0 33,806 192,607 
Total held-to-maturity debt securities$312,462 $0 $45,167 $267,295 
The following table summarizes held-to-maturity debt securities that had unrealized losses at September 30, 2025 and December 31, 2024:
Less than 12 Months12 Months or LongerTotal
(In thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
September 30, 2025
U.S. Treasuries$0 $0 $78,239 $7,646 $78,239 $7,646 
Obligations of U.S. Government sponsored entities0 0 203,385 23,240 203,385 23,240 
Total held-to-maturity debt securities$0 $0 $281,624 $30,886 $281,624 $30,886 
December 31, 2024
U.S. Treasuries$0 $0 $74,688 $11,361 $74,688 $11,361 
Obligations of U.S. Government sponsored entities0 0 192,607 33,806 192,607 33,806 
Total held-to-maturity debt securities$0 $0 $267,295 $45,167 $267,295 $45,167 
Schedule of available-for-sale securities with unrealized losses
The following table summarizes available-for-sale debt securities that had unrealized losses at September 30, 2025, and December 31, 2024:
Less than 12 Months12 Months or LongerTotal
(In thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
September 30, 2025
U.S. Treasuries$0 $0 $38,655 $2,194 $38,655 $2,194 
Obligations of U.S. Government sponsored entities0 0 150,482 12,753 150,482 12,753 
Obligations of U.S. states and political subdivisions2,533 1 64,883 5,631 67,416 5,632 
Mortgage-backed securities – residential, issued by
U.S. Government agencies13,501 19 40,746 3,683 54,247 3,702 
U.S. Government sponsored entities29,898 266 492,286 77,465 522,184 77,731 
U.S. corporate debt securities0 0 2,444 56 2,444 56 
Total available-for-sale debt securities$45,932 $286 $789,496 $101,782 $835,428 $102,068 
December 31, 2024
U.S. Treasuries$0 $0 $57,019 $3,784 $57,019 $3,784 
Obligations of U.S. Government sponsored entities14,085 515 188,296 19,861 202,381 20,376 
Obligations of U.S. states and political subdivisions3,159 36 73,657 8,602 76,816 8,638 
Mortgage-backed securities – residential, issued by
U.S. Government agencies27,0828935,8794,79062,9614,879
U.S. Government sponsored entities32,063502523,353101,194555,416101,696
U.S. corporate debt securities0 0 2,447 53 2,447 53 
Total available-for-sale debt securities$76,389 $1,142 $880,651 $138,284 $957,040 $139,426 
Schedule of available-for-sale and held-to-maturity securities amortized cost and estimated fair value
September 30, 2025December 31, 2024
(In thousands)Amortized CostFair ValueAmortized CostFair Value
Available-for-sale debt securities:
Due in one year or less$69,215 $69,378 $100,000 $99,153 
Due after one year through five years244,576 236,589 227,502 215,976 
Due after five years through ten years188,503 182,170 212,789 199,457 
Due after ten years1,263 1,006 22,326 17,332 
Total503,557 489,143 562,617 531,918 
Mortgage-backed securities877,226 801,910 804,506 699,614 
Total available-for-sale debt securities$1,380,783 $1,291,053 $1,367,123 $1,231,532 
September 30, 2025December 31, 2024
(In thousands)Amortized CostFair ValueAmortized CostFair Value
Held-to-maturity debt securities:
Due after one year through five years$174,885 $159,274 $117,283 $102,173 
Due after five years through ten years137,625 122,350 195,179 165,122 
Total held-to-maturity debt securities$312,510 $281,624 $312,462 $267,295