v3.26.1
INVESTMENT SECURITIES (Tables)
6 Months Ended
Jun. 30, 2026
INVESTMENT SECURITIES  
Schedule of the amortized cost and approximate fair values of securities

  ​ ​ ​

  ​ ​ ​

Gross

  ​ ​ ​

Gross

  ​ ​ ​

Amortized 

Unrealized

Unrealized

Fair 

June 30, 2026

Cost

Gains

Losses

Value

Available-for-sale securities:

 

  ​

 

  ​

 

 

  ​

Municipal securities

$

2,834,172

$

2,091

$

1,619

$

2,834,644

Collateralized mortgage obligation bonds

 

43,255

 

 

1,252

 

42,003

U.S. government agencies

 

1,498,016

 

 

73,679

 

1,424,337

Mortgage-backed securities

 

1,170,763

 

3,208

 

75,552

 

1,098,419

$

5,546,206

$

5,299

$

152,102

$

5,399,403

  ​ ​ ​

  ​ ​ ​

Gross

  ​ ​ ​

Gross

  ​ ​ ​

Amortized 

Unrealized 

Unrealized

Fair 

December 31, 2025

Cost

Gains

Losses

Value

Available-for-sale securities:

 

  ​

 

  ​

 

  ​

 

  ​

Municipal securities

$

2,837,990

$

2,253

$

4,207

$

2,836,036

Collateralized mortgage obligation bonds

 

50,980

 

 

1,263

 

49,717

U.S. government agencies

 

1,497,747

 

 

59,911

 

1,437,836

Mortgage-backed securities

 

1,282,116

 

6,981

 

73,994

 

1,215,103

$

5,668,833

$

9,234

$

139,375

$

5,538,692

Schedule of the amortized cost and fair value of securities by contractual maturity

June 30, 2026

Available-for-sale

Amortized

Fair 

Cost

Value

Municipal securities and U.S. government agencies

  ​ ​ ​

  ​

  ​ ​ ​

  ​

Due less than one year

$

310,000

$

309,953

Due one to five years

 

1,498,016

 

1,424,337

Due five to ten years

 

1,995,000

 

1,997,091

Due after ten years

 

529,172

 

527,600

Total

$

4,332,188

$

4,258,981

Mortgage-backed securities and collateralized mortgage obligation bonds

 

1,214,018

 

1,140,422

Total

$

5,546,206

$

5,399,403

Schedule of gross unrealized losses and fair value of investments in continuous loss position

Less than 12 Months

12 Months or Longer

Total

Fair

Unrealized

Fair 

Unrealized

Fair

Unrealized

Value

Losses

Value

Losses

Value

Losses

June 30, 2026

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

Municipal securities

$

309,954

$

47

$

527,600

$

1,572

$

837,554

$

1,619

Collateralized mortgage obligation bonds

 

 

 

42,003

 

1,252

 

42,003

 

1,252

U.S. government agencies

 

 

 

1,424,337

 

73,679

 

1,424,337

 

73,679

Mortgage-backed securities

 

 

 

730,111

 

75,552

 

730,111

 

75,552

Total

$

309,954

$

47

$

2,724,051

$

152,055

$

3,034,005

$

152,102

Less than 12 Months

12 Months or Longer

Total

Fair

Unrealized

Fair

Unrealized

Fair

Unrealized

Value

Losses

Value

Losses

Value

Losses

December 31, 2025

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

Municipal securities

$

$

$

528,782

$

4,207

$

528,782

$

4,207

Collateralized mortgage obligation bonds

 

 

 

49,717

 

1,263

 

49,717

 

1,263

U.S. government agencies

 

 

 

1,437,836

 

59,911

 

1,437,836

 

59,911

Mortgage-backed securities

 

 

 

825,648

 

73,994

 

825,648

 

73,994

Total

$

$

$

2,841,983

$

139,375

$

2,841,983

$

139,375

Schedule of number and aggregate depreciation of available-for-sale securities in a continuous unrealized loss position by security type

  ​ ​ ​

Number of

  ​ ​ ​

 

securities in

Aggregate

 

a loss position

Depreciation

 

June 30, 2026

 

  ​

 

  ​

Municipal securities

 

2

 

(0.19)

%

Collateralized mortgage obligation bonds

 

1

 

(2.89)

%

U.S. government agencies

 

2

 

(4.92)

%

Mortgage-backed securities

 

8

 

(9.38)

%

Total Portfolio

 

13

 

(4.77)

%

  ​ ​ ​

Number of

  ​ ​ ​

 

securities in

Aggregate

 

a loss position

Depreciation

 

December 31, 2025

 

  ​

 

  ​

Municipal securities

 

1

 

(0.79)

%

Collateralized mortgage obligation bonds

 

1

 

(2.48)

%

U.S. government agencies

 

2

 

(4.00)

%

Mortgage-backed securities

 

8

 

(8.22)

%

Total Portfolio

 

12

 

(4.67)

%