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Securities (Tables)
 3 Months Ended
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Schedule of Amortized Cost and Fair Value of Securities Available for Sale
The amortized cost and fair value of securities available for sale were as follows as of the dates presented in the tables below.

There was no allowance for credit losses allocated to any of the Company’s available for sale securities as of March 31, 2026 or December 31, 2025.
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
March 31, 2026
Obligations of states and political subdivisions$272,729 $5,493 $(3,580)$274,642 
Residential mortgage-backed securities:
Agency mortgage-backed securities1,045,352 2,144 (18,395)1,029,101 
Collateralized mortgage obligations727,087 3,565 (62,584)668,068 
Commercial mortgage-backed securities:
Agency mortgage-backed securities99,305 203 (461)99,047 
Collateralized mortgage obligations419,035 2,985 (18,798)403,222 
Other debt securities336,708 1,145 (2,286)335,567 
$2,900,216 $15,535 $(106,104)$2,809,647 
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2025
Obligations of states and political subdivisions$266,553 $8,012 $(1,780)$272,785 
Residential mortgage-backed securities:
Agency mortgage-backed securities793,154 5,670 (15,675)783,149 
Collateralized mortgage obligations706,986 2,826 (57,908)651,904 
Commercial mortgage-backed securities:
Agency mortgage-backed securities100,314 285 (762)99,837 
Collateralized mortgage obligations419,356 3,552 (18,120)404,788 
Other debt securities349,132 1,537 (2,314)348,355 
$2,635,495 $21,882 $(96,559)$2,560,818 
The amortized cost and fair value of securities held to maturity were as follows as of the dates presented:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
March 31, 2026
Obligations of states and political subdivisions$278,510 $9 $(31,584)$246,935 
Residential mortgage-backed securities:
Agency mortgage-backed securities313,373 — (12,441)300,932 
Collateralized mortgage obligations312,961 — (23,348)289,613 
Commercial mortgage-backed securities:
Agency mortgage-backed securities16,901 — (2,079)14,822 
Collateralized mortgage obligations41,851 — (6,004)35,847 
Other debt securities42,947 — (2,400)40,547 
$1,006,543 $9 $(77,856)$928,696 
Allowance for credit losses - held to maturity securities(32)
Held-to-maturity securities, net of allowance for credit losses$1,006,511 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2025
Obligations of states and political subdivisions$279,424 $29 $(29,516)$249,937 
Residential mortgage-backed securities:
Agency mortgage-backed securities323,993 — (10,030)313,963 
Collateralized mortgage obligations320,258 — (18,600)301,658 
Commercial mortgage-backed securities:
Agency mortgage-backed securities16,938 — (2,059)14,879 
Collateralized mortgage obligations42,079 — (5,997)36,082 
Other debt securities47,413 — (2,062)45,351 
$1,030,105 $29 $(68,264)$961,870 
Allowance for credit losses - held to maturity securities(32)
Held-to-maturity securities, net of allowance for credit losses$1,030,073 
Schedule of Amortized Cost and Fair Value of Securities by Contractual Maturity
The amortized cost and fair value of securities at March 31, 2026 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may call or prepay obligations with or without call or prepayment penalties.
 
 Held to MaturityAvailable for Sale
 Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due within one year$230 $230 $7,235 $7,247 
Due after one year through five years12,007 11,528 73,896 74,540 
Due after five years through ten years186,144 166,048 123,963 123,220 
Due after ten years80,129 69,129 117,477 119,256 
Residential mortgage-backed securities:
Agency mortgage-backed securities313,373 300,932 1,045,352 1,029,101 
Collateralized mortgage obligations312,961 289,613 727,087 668,068 
Commercial mortgage-backed securities:
Agency mortgage-backed securities16,901 14,822 99,305 99,047 
Collateralized mortgage obligations41,851 35,847 419,035 403,222 
Other debt securities42,947 40,547 286,866 285,946 
$1,006,543 $928,696 $2,900,216 $2,809,647 
Schedule of Gross Unrealized Losses and Fair Value of Available-for-Sale Securities
The following tables present the age of gross unrealized losses and fair value by investment category for which an allowance for credit losses has not been recorded as of the dates presented:
 
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Available for Sale:
March 31, 2026
Obligations of states and political subdivisions41 $61,680 $(1,575)11$15,793 $(2,005)52$77,473 $(3,580)
Residential mortgage-backed securities:
Agency mortgage-backed securities18 408,243 (2,236)38192,999 (16,159)56601,242 (18,395)
Collateralized mortgage obligations2 73,544 (333)38287,019 (62,251)40360,563 (62,584)
Commercial mortgage-backed securities:
Agency mortgage-backed securities846,283 (180)14,680 (281)950,963 (461)
Collateralized mortgage obligations24107,519 (635)26102,716 (18,163)50210,235 (18,798)
Other debt securities12 150,891 (293)1068,947 (1,993)22219,838 (2,286)
Total105$848,160 $(5,252)124$672,154 $(100,852)229$1,520,314 $(106,104)
December 31, 2025
Obligations of states and political subdivisions13$19,454 $(445)7$13,591 $(1,335)20$33,045 $(1,780)
Residential mortgage-backed securities:
Agency mortgage-backed securities8135,320 (903)36132,975 (14,772)44268,295 (15,675)
Collateralized mortgage obligations2 24,816 (58)37299,606 (57,850)39324,422 (57,908)
Commercial mortgage-backed securities:
Agency mortgage-backed securities9 71,188 (395)25,595 (367)1176,783 (762)
Collateralized mortgage obligations12 40,387 (56)25102,206 (18,064)37142,593 (18,120)
Other debt securities10191,504 (1,347)814,571 (967)18206,075 (2,314)
Total54$482,669 $(3,204)115$568,544 $(93,355)169$1,051,213 $(96,559)
Schedule of Gross Unrealized Losses and Fair Value of Held-to-Maturity Securities
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Held to Maturity:
March 31, 2026
Obligations of states and political subdivisions7$17,311 $(1,296)117$227,737 $(30,288)124$245,048 $(31,584)
Residential mortgage-backed securities:
Agency mortgage-backed securities444,100 (728)62256,832 (11,713)66300,932 (12,441)
Collateralized mortgage obligations—— — 18289,613 (23,348)18289,613 (23,348)
Commercial mortgage-backed securities:
Agency mortgage-backed securities—— — 114,823 (2,079)114,823 (2,079)
Collateralized mortgage obligations—— — 935,847 (6,004)935,847 (6,004)
Other debt securities—— — 1040,547 (2,400)1040,547 (2,400)
Total11$61,411 $(2,024)217$865,399 $(75,832)228$926,810 $(77,856)
December 31, 2025
Obligations of states and political subdivisions—$— $— 124$248,044 $(29,516)124$248,044 $(29,516)
Residential mortgage-backed securities:
Agency mortgage-backed securities—— — 66313,963 (10,030)66313,963 (10,030)
Collateralized mortgage obligations—— — 18301,657 (18,600)18301,657 (18,600)
Commercial mortgage-backed securities:
Agency mortgage-backed securities—— — 114,879 (2,059)114,879 (2,059)
Collateralized mortgage obligations—— — 936,083 (5,997)936,083 (5,997)
Other debt securities—— — 1045,351 (2,062)1045,351 (2,062)
Total—$— $— 228$959,977 $(68,264)228$959,977 $(68,264)