XML 45 R35.htm IDEA: XBRL DOCUMENT v3.25.3

Available for Sale Securities (Details)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

USD ($)

Sep. 30, 2024

USD ($)

Sep. 30, 2025

USD ($)

Sep. 30, 2024

USD ($)

Dec. 31, 2024

USD ($)

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

$ 13,684,712

$ 13,684,712

$ 13,388,935

Available-for-sale Securities, Fair Value

13,481,030

13,481,030

12,851,600

Available-for-sale Securities, Gross Unrealized Gain

116,845

116,845

29,911

Available-for-sale Securities, Gross Unrealized Loss

(320,527)

(320,527)

(567,246)

Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]

Available-for-sale Securities, Proceeds

171,345

$ 101,522

171,345

$ 839,352

Available-for-sale Securities, Gross realized gains

630

1,802

630

2,257

Available-for-sale Securities, Gross realized losses

(417)

(2,493)

(417)

(48,085)

Available-for-sale Securities, Related federal and state income tax expense (benefit)

50

$ (163)

50

$ (10,779)

Asset Pledged as Collateral with Right

Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]

Pledged Securities

10,300,000

10,300,000

9,900,000

Fixed Maturity Securities [Member]

Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]

Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis

450,706

450,706

Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis

2,213,053

2,213,053

Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis

392,697

392,697

Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis

421,842

421,842

Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost

3,478,298

3,478,298

Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]

Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value

443,022

443,022

Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value

2,100,852

2,100,852

Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value

376,871

376,871

Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value

413,393

413,393

Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value

$ 3,334,138

$ 3,334,138

Available-for-sale Securities, Debt Maturities, Weighted Average Maturity

^[1]

4.69

4.69

U.S. Treasury [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

$ 1,000

$ 1,000

1,000

Available-for-sale Securities, Fair Value

972

972

945

Available-for-sale Securities, Gross Unrealized Gain

0

0

0

Available-for-sale Securities, Gross Unrealized Loss

(28)

(28)

(55)

Municipal securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

196,937

196,937

240,528

Available-for-sale Securities, Fair Value

188,921

188,921

225,568

Available-for-sale Securities, Gross Unrealized Gain

0

0

2

Available-for-sale Securities, Gross Unrealized Loss

(8,016)

(8,016)

(14,962)

Commercial agency mortgage-backed securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

3,279,861

3,279,861

3,436,465

Available-for-sale Securities, Fair Value

3,143,772

3,143,772

3,204,016

Available-for-sale Securities, Gross Unrealized Gain

6,662

6,662

726

Available-for-sale Securities, Gross Unrealized Loss

(142,751)

(142,751)

(233,175)

Other debt securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

500

500

500

Available-for-sale Securities, Fair Value

473

473

473

Available-for-sale Securities, Gross Unrealized Gain

0

0

0

Available-for-sale Securities, Gross Unrealized Loss

(27)

(27)

(27)

Residential Mortgage Backed Securities [Member]

Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]

Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost

^[2]

10,206,414

10,206,414

Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]

Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value

$ 10,146,892

10,146,892

Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities

4 years 1 month 6 days

Residential agency mortgage-backed securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

$ 9,448,172

9,448,172

8,895,900

Available-for-sale Securities, Fair Value

9,406,920

9,406,920

8,639,389

Available-for-sale Securities, Gross Unrealized Gain

98,015

98,015

17,936

Available-for-sale Securities, Gross Unrealized Loss

(139,267)

(139,267)

(274,447)

Residential non-agency mortgage-backed securities [Member]

Debt Securities, Available-for-sale [Line Items]

Available-for-sale Securities, Amortized Cost

758,242

758,242

814,542

Available-for-sale Securities, Fair Value

739,972

739,972

781,209

Available-for-sale Securities, Gross Unrealized Gain

12,168

12,168

11,247

Available-for-sale Securities, Gross Unrealized Loss

$ (30,438)

$ (30,438)

$ (44,580)

[1]	Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
[2]	The average expected lives of residential mortgage-backed securities were 4.1 years based upon current prepayment assumptions.

X

- Definition

The calculated weighted-average expected life of mortgage-backed securities based on prepayment assumptions as of the balance sheet date.

+ References

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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