v3.26.1
Securities (Tables)
6 Months Ended
Jun. 30, 2026
Securities Available for Sale

This table provides detailed information about securities available for sale at June 30, 2026 and December 31, 2025 (in thousands):

June 30, 2026

 

Amortized
Cost

 

 

Gross
Unrealized
Gains

 

 

Gross
Unrealized
Losses

 

 

Fair
Value

 

U.S. Treasury

 

$

2,212,279

 

 

$

1,966

 

 

$

(9,328

)

 

$

2,204,917

 

U.S. Agencies

 

 

48,776

 

 

 

66

 

 

 

(57

)

 

 

48,785

 

Mortgage-backed

 

 

8,582,743

 

 

 

22,107

 

 

 

(381,235

)

 

 

8,223,615

 

State and political subdivisions

 

 

2,419,723

 

 

 

18,092

 

 

 

(65,318

)

 

 

2,372,497

 

Corporates

 

 

88,922

 

 

 

250

 

 

 

(1,863

)

 

 

87,309

 

Collateralized loan obligations

 

 

550,875

 

 

 

309

 

 

 

(148

)

 

 

551,036

 

Total

 

$

13,903,318

 

 

$

42,790

 

 

$

(457,949

)

 

$

13,488,159

 

December 31, 2025

 

Amortized
Cost

 

 

Gross
Unrealized
Gains

 

 

Gross
Unrealized
Losses

 

 

Fair
Value

 

U.S. Treasury

 

$

2,301,248

 

 

$

20,008

 

 

$

(441

)

 

$

2,320,815

 

U.S. Agencies

 

 

62,069

 

 

 

401

 

 

 

(100

)

 

 

62,370

 

Mortgage-backed

 

 

8,427,197

 

 

 

71,827

 

 

 

(331,151

)

 

 

8,167,873

 

State and political subdivisions

 

 

2,494,537

 

 

 

24,898

 

 

 

(72,847

)

 

 

2,446,588

 

Corporates

 

 

180,854

 

 

 

349

 

 

 

(4,088

)

 

 

177,115

 

Collateralized loan obligations

 

 

533,995

 

 

 

504

 

 

 

(119

)

 

 

534,380

 

Total

 

$

13,999,900

 

 

$

117,987

 

 

$

(408,746

)

 

$

13,709,141

 

 

Schedule of Sales of Securities Available for Sale

The following table presents the sales of securities available for sale for the three and six months ended June 30, 2026 and 2025 (in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2026

 

 

2025

 

 

2026

 

 

2025

 

Proceeds from sales

 

$

5,375

 

 

$

4,931

 

 

$

57,146

 

 

$

616,354

 

Gross realized gains

 

 

26

 

 

 

33

 

 

 

429

 

 

 

423

 

Gross realized losses

 

 

 

 

 

 

 

 

 

 

 

 

Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale

The following table shows the Company’s available-for-sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2026 and December 31, 2025 (in thousands):

 

 

Less than 12 months

 

 

12 months or more

 

 

Total

 

June 30, 2026

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

Description of Securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury

 

 

201

 

 

$

1,508,078

 

 

$

(9,256

)

 

 

1

 

 

$

14,925

 

 

$

(72

)

 

 

202

 

 

$

1,523,003

 

 

$

(9,328

)

U.S. Agencies

 

 

1

 

 

 

6,663

 

 

 

(57

)

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

6,663

 

 

 

(57

)

Mortgage-backed

 

 

384

 

 

 

3,684,127

 

 

 

(45,541

)

 

 

795

 

 

 

2,591,410

 

 

 

(335,694

)

 

 

1,179

 

 

 

6,275,537

 

 

 

(381,235

)

State and political subdivisions

 

 

349

 

 

 

398,225

 

 

 

(3,488

)

 

 

805

 

 

 

800,287

 

 

 

(61,830

)

 

 

1,154

 

 

 

1,198,512

 

 

 

(65,318

)

Corporates

 

 

 

 

 

 

 

 

 

 

 

46

 

 

 

70,302

 

 

 

(1,863

)

 

 

46

 

 

 

70,302

 

 

 

(1,863

)

Collateralized loan obligations

 

 

20

 

 

 

189,707

 

 

 

(148

)

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

189,707

 

 

 

(148

)

Total

 

 

955

 

 

$

5,786,800

 

 

$

(58,490

)

 

 

1,647

 

 

$

3,476,924

 

 

$

(399,459

)

 

 

2,602

 

 

$

9,263,724

 

 

$

(457,949

)

 

 

 

 

Less than 12 months

 

 

12 months or more

 

 

Total

 

December 31, 2025

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

Description of Securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury

 

 

8

 

 

$

72,013

 

 

$

(88

)

 

 

2

 

 

$

30,234

 

 

$

(353

)

 

 

10

 

 

$

102,247

 

 

$

(441

)

U.S. Agencies

 

 

1

 

 

 

7,855

 

 

 

(100

)

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

7,855

 

 

 

(100

)

Mortgage-backed

 

 

82

 

 

 

757,160

 

 

 

(5,682

)

 

 

817

 

 

 

2,871,729

 

 

 

(325,469

)

 

 

899

 

 

 

3,628,889

 

 

 

(331,151

)

State and political subdivisions

 

 

152

 

 

 

515,364

 

 

 

(11,181

)

 

 

1,142

 

 

 

809,113

 

 

 

(61,666

)

 

 

1,294

 

 

 

1,324,477

 

 

 

(72,847

)

Corporates

 

 

1

 

 

 

2,990

 

 

 

(10

)

 

 

134

 

 

 

164,108

 

 

 

(4,078

)

 

 

135

 

 

 

167,098

 

 

 

(4,088

)

Collateralized loan obligations

 

 

20

 

 

 

164,531

 

 

 

(112

)

 

 

1

 

 

 

2,999

 

 

 

(7

)

 

 

21

 

 

 

167,530

 

 

 

(119

)

Total

 

 

264

 

 

$

1,519,913

 

 

$

(17,173

)

 

 

2,096

 

 

$

3,878,183

 

 

$

(391,573

)

 

 

2,360

 

 

$

5,398,096

 

 

$

(408,746

)

Gross Unrealized Losses and Fair Value of Investment Securities Held to Maturity

The following table shows the Company’s held-to-maturity investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2026 and December 31, 2025, respectively (in thousands):

 

 

 

Less than 12 months

 

 

12 months or more

 

 

Total

 

June 30, 2026

 

Count

 

 

Fair Value

 

 

Unrealized Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized Losses

 

U.S. Treasury

 

 

7

 

 

$

37,705

 

 

$

(555

)

 

 

 

 

$

 

 

$

 

 

 

7

 

 

$

37,705

 

 

$

(555

)

Mortgage-backed

 

 

17

 

 

 

195,205

 

 

 

(3,487

)

 

 

262

 

 

 

1,890,512

 

 

 

(315,967

)

 

 

279

 

 

 

2,085,717

 

 

 

(319,454

)

State and political subdivisions

 

 

180

 

 

 

828,018

 

 

 

(42,832

)

 

 

1,341

 

 

 

1,387,515

 

 

 

(137,922

)

 

 

1,521

 

 

 

2,215,533

 

 

 

(180,754

)

Total

 

 

204

 

 

$

1,060,928

 

 

$

(46,874

)

 

 

1,603

 

 

$

3,278,027

 

 

$

(453,889

)

 

 

1,807

 

 

$

4,338,955

 

 

$

(500,763

)

 

 

 

Less than 12 months

 

 

12 months or more

 

 

Total

 

December 31, 2025

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Count

 

 

Fair Value

 

 

Unrealized
Losses

 

U.S. Treasury

 

 

3

 

 

$

15,913

 

 

$

(37

)

 

 

 

 

$

 

 

$

 

 

 

3

 

 

$

15,913

 

 

$

(37

)

Mortgage-backed

 

 

10

 

 

 

147,066

 

 

 

(918

)

 

 

262

 

 

 

1,998,984

 

 

 

(304,122

)

 

 

272

 

 

 

2,146,050

 

 

 

(305,040

)

State and political subdivisions

 

 

146

 

 

 

687,180

 

 

 

(41,122

)

 

 

1,354

 

 

 

1,480,709

 

 

 

(154,638

)

 

 

1,500

 

 

 

2,167,889

 

 

 

(195,760

)

Total

 

 

159

 

 

$

850,159

 

 

$

(42,077

)

 

 

1,616

 

 

$

3,479,693

 

 

$

(458,760

)

 

 

1,775

 

 

$

4,329,852

 

 

$

(500,837

)

 

Schedule of Amortized Cost Basis by Credit Rating of Held to Maturity Investment

The following tables show the amortized cost basis by credit rating of the Company’s held-to-maturity State and political subdivisions bond investments at June 30, 2026 and December 31, 2025 (in thousands):

 

 

 

Amortized Cost Basis by Credit Rating - HTM Debt Securities

 

June 30, 2026

 

AAA

 

 

AA

 

 

A

 

 

BBB

 

 

BB

 

 

B

 

 

CCC-C

 

 

Total

 

State and political subdivisions:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitive

 

$

47,599

 

 

$

50,866

 

 

$

346,707

 

 

$

820,929

 

 

$

30,143

 

 

$

28,447

 

 

$

13,458

 

 

$

1,338,149

 

Utilities

 

 

836,298

 

 

 

959,900

 

 

 

122,087

 

 

 

13,983

 

 

 

1,764

 

 

 

 

 

 

 

 

 

1,934,032

 

Total state and political subdivisions

 

$

883,897

 

 

$

1,010,766

 

 

$

468,794

 

 

$

834,912

 

 

$

31,907

 

 

$

28,447

 

 

$

13,458

 

 

$

3,272,181

 

 

 

 

Amortized Cost Basis by Credit Rating - HTM Debt Securities

 

December 31, 2025

 

AAA

 

 

AA

 

 

A

 

 

BBB

 

 

BB

 

 

B

 

 

CCC-C

 

 

Total

 

State and political subdivisions:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitive

 

$

46,933

 

 

$

51,390

 

 

$

379,973

 

 

$

812,061

 

 

$

34,105

 

 

$

23,326

 

 

$

14,424

 

 

$

1,362,212

 

Utilities

 

 

899,088

 

 

 

777,880

 

 

 

114,845

 

 

 

15,824

 

 

 

2,458

 

 

 

 

 

 

 

 

 

1,810,095

 

Total state and political subdivisions

 

$

946,021

 

 

$

829,270

 

 

$

494,818

 

 

$

827,885

 

 

$

36,563

 

 

$

23,326

 

 

$

14,424

 

 

$

3,172,307

 

Schedule of Aging of Past due Held to Maturity Securities

The following table presents the aging of past due held-to-maturity securities at June 30, 2026 (in thousands):

 

June 30, 2026

 

30-89
Days Past
Due and
Accruing

 

 

Greater than
90 Days Past
Due and
Accruing

 

 

Non-
Accrual

 

 

Total
Past Due

 

 

Current

 

 

Total

 

State and political subdivisions:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitive

 

$

8,276

 

 

$

 

 

$

 

 

$

8,276

 

 

$

1,329,873

 

 

$

1,338,149

 

Utilities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1,934,032

 

 

 

1,934,032

 

Total state and political subdivisions

 

$

8,276

 

 

$

 

 

$

 

 

$

8,276

 

 

$

3,263,905

 

 

$

3,272,181

 

Schedule of Changes in Equity Securities Without Readily Determinable Fair Values

The table below presents the changes in equity securities without readily determinable fair values for the three and six months ended June 30, 2026 and 2025 (in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2026

 

 

2025

 

 

2026

 

 

2025

 

Beginning balance

 

$

535,326

 

 

$

539,930

 

 

$

524,112

 

 

$

416,750

 

Acquisition of HTLF

 

 

 

 

 

1,117

 

 

 

 

 

 

122,886

 

Purchases of securities

 

 

16,322

 

 

 

24,827

 

 

 

49,986

 

 

 

48,830

 

Observable upward price adjustments

 

 

30,902

 

 

 

9,411

 

 

 

34,470

 

 

 

10,433

 

Observable downward price adjustments

 

 

(4,088

)

 

 

(2,302

)

 

 

(4,724

)

 

 

(8,575

)

Sales of securities and other activity

 

 

(35,237

)

 

 

(39,234

)

 

 

(60,619

)

 

 

(56,575

)

Ending balance

 

$

543,225

 

 

$

533,749

 

 

$

543,225

 

 

$

533,749

 

Schedule of Other Securities

The table below provides detailed information for Other securities at June 30, 2026 and December 31, 2025 (in thousands):

 

 

 

June 30, 2026

 

 

December 31, 2025

 

FRB and FHLB stock

 

$

137,667

 

 

$

137,498

 

Equity securities with readily determinable fair values

 

 

12,610

 

 

 

14,690

 

Equity securities without readily determinable fair values

 

 

543,225

 

 

 

524,112

 

Total

 

$

693,502

 

 

$

676,300

 

Schedule of Components of Investment Securities Gains, Net

The following table presents the components of Investment securities gains, net for the three and six months ended June 30, 2026 and June 30, 2025 (in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2026

 

 

2025

 

 

2026

 

 

2025

 

Investment securities gains, net

 

 

 

 

 

 

 

 

 

 

 

 

Available-for-sale debt securities:

 

 

 

 

 

 

 

 

 

 

 

 

Gains realized on sales

 

$

26

 

 

$

33

 

 

$

429

 

 

$

423

 

Equity securities with readily determinable fair values:

 

 

 

 

 

 

 

 

 

 

 

 

Fair value adjustments, net

 

 

62

 

 

 

29,472

 

 

 

(225

)

 

 

29,616

 

Equity securities without readily determinable fair values:

 

 

 

 

 

 

 

 

 

 

 

 

Fair value adjustments, net

 

 

8,534

 

 

 

(60

)

 

 

8,849

 

 

 

(5,303

)

Sales

 

 

18,465

 

 

 

8,240

 

 

 

21,080

 

 

 

8,167

 

Total investment securities gains, net

 

$

27,087

 

 

$

37,685

 

 

$

30,133

 

 

$

32,903

 

Available-for-sale Securities [Member]  
Contractual Maturity Information

The following table presents contractual maturity information for securities available for sale at June 30, 2026 (in thousands):

 

 

Amortized

 

 

Fair

 

 

 

Cost

 

 

Value

 

Due in 1 year or less

 

$

899,563

 

 

$

899,840

 

Due after 1 year through 5 years

 

 

2,072,561

 

 

 

2,056,146

 

Due after 5 years through 10 years

 

 

562,639

 

 

 

554,837

 

Due after 10 years

 

 

1,785,812

 

 

 

1,753,721

 

Total

 

 

5,320,575

 

 

 

5,264,544

 

Mortgage-backed securities

 

 

8,582,743

 

 

 

8,223,615

 

Total securities available for sale

 

$

13,903,318

 

 

$

13,488,159

 

Held-to-maturity Securities [Member]  
Contractual Maturity Information

The following table provides detailed information about securities held to maturity at June 30, 2026 and December 31, 2025, respectively (in thousands):

June 30, 2026

 

Amortized Cost

 

 

Gross Unrealized Gains

 

 

Gross Unrealized Losses

 

 

Fair Value

 

 

Allowance for Credit Losses

 

 

Net Carrying Amount

 

U.S. Treasury

 

$

38,260

 

 

$

 

 

$

(555

)

 

$

37,705

 

 

$

 

 

$

38,260

 

Mortgage-backed

 

 

2,405,985

 

 

 

3

 

 

 

(319,454

)

 

 

2,086,534

 

 

 

 

 

 

2,405,985

 

State and political subdivisions

 

 

3,272,181

 

 

 

23,781

 

 

 

(180,754

)

 

 

3,115,208

 

 

 

(3,996

)

 

 

3,268,185

 

Total

 

$

5,716,426

 

 

$

23,784

 

 

$

(500,763

)

 

$

5,239,447

 

 

$

(3,996

)

 

$

5,712,430

 

December 31, 2025

 

Amortized Cost

 

 

Gross Unrealized Gains

 

 

Gross Unrealized Losses

 

 

Fair Value

 

 

Allowance for Credit Losses

 

 

Net Carrying Amount

 

U.S. Treasury

 

$

38,253

 

 

$

27

 

 

$

(37

)

 

$

38,243

 

 

$

 

 

$

38,253

 

Mortgage-backed

 

 

2,513,667

 

 

 

335

 

 

 

(305,040

)

 

 

2,208,962

 

 

 

 

 

 

2,513,667

 

State and political subdivisions

 

 

3,172,307

 

 

 

26,713

 

 

 

(195,760

)

 

 

3,003,260

 

 

 

(1,684

)

 

 

3,170,623

 

Total

 

$

5,724,227

 

 

$

27,075

 

 

$

(500,837

)

 

$

5,250,465

 

 

$

(1,684

)

 

$

5,722,543

 

The following table presents contractual maturity information for securities held to maturity at June 30, 2026 (in thousands):

 

 

 

Amortized

 

 

Fair

 

 

 

Cost

 

 

Value

 

Due in 1 year or less

 

$

89,562

 

 

$

89,149

 

Due after 1 year through 5 years

 

 

556,314

 

 

 

548,106

 

Due after 5 years through 10 years

 

 

797,227

 

 

 

767,036

 

Due after 10 years

 

 

1,867,338

 

 

 

1,748,622

 

Total

 

 

3,310,441

 

 

 

3,152,913

 

Mortgage-backed securities

 

 

2,405,985

 

 

 

2,086,534

 

Total securities held to maturity

 

$

5,716,426

 

 

$

5,239,447