v3.26.1
INVESTMENT SECURITIES (Tables)
3 Months Ended
Mar. 31, 2026
INVESTMENT SECURITIES  
Schedule of the amortized cost and approximate fair values of securities

  ​ ​ ​

  ​ ​ ​

Gross

  ​ ​ ​

Gross

  ​ ​ ​

Amortized 

Unrealized

Unrealized

Fair 

March 31, 2026

Cost

Gains

Losses

Value

Available-for-sale securities:

 

  ​

 

  ​

 

  ​

 

  ​

Municipal securities

$

2,836,073

$

1,913

$

3,535

$

2,834,451

Collateralized mortgage obligation bonds

 

47,340

 

 

1,327

 

46,013

U.S. government agencies

 

1,497,851

 

 

68,954

 

1,428,897

Mortgage-backed securities

 

1,232,096

 

4,922

 

77,121

 

1,159,897

$

5,613,360

$

6,835

$

150,937

$

5,469,258

  ​ ​ ​

  ​ ​ ​

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

March 31, 2026

Available-for-sale

Amortized

Fair 

Cost

Value

Municipal securities and U.S. government agencies

  ​ ​ ​

  ​

  ​ ​ ​

  ​

Due less than one year

$

310,000

$

310,081

Due one to five years

 

1,497,851

 

1,428,897

Due five to ten years

 

1,995,000

 

1,996,832

Due after ten years

 

531,073

 

527,538

Total

$

4,333,924

$

4,263,348

Mortgage-backed securities and collateralized mortgage obligation bonds

 

1,279,436

 

1,205,910

Total

$

5,613,360

$

5,469,258

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

March 31, 2026

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

  ​ ​ ​

  ​

Municipal securities

$

$

$

527,538

$

3,535

$

527,538

$

3,535

Collateralized mortgage obligation bonds

 

 

 

46,013

 

1,327

 

46,013

 

1,327

U.S. government agencies

 

 

 

1,428,897

 

68,954

 

1,428,897

 

68,954

Mortgage-backed securities

 

 

 

774,171

 

77,121

 

774,171

 

77,121

Total

$

$

$

2,776,619

$

150,937

$

2,776,619

$

150,937

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

 

March 31, 2026

 

  ​

 

  ​

Municipal securities

 

1

 

(0.67)

%

Collateralized mortgage obligation bonds

 

1

 

(2.80)

%

U.S. government agencies

 

2

 

(4.60)

%

Mortgage-backed securities

 

8

 

(9.06)

%

Total Portfolio

 

12

 

(5.16)

%

  ​ ​ ​

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)

%