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Investment Securities (Tables)
9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Summary of Amortized Cost and Estimated Fair Value of Investment Securities

 

September 30, 2022

 

 

Amortized Cost

 

 

Gross Unrealized Holding Gain

 

 

Gross Unrealized Holding Loss

 

 

Fair Value

 

 

Total Percent

 

 

(Dollars in thousands)

 

Investment securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mortgage-backed securities

$

3,288,484

 

 

$

30

 

 

$

(448,585

)

 

$

2,839,929

 

 

 

85.49

%

CMO/REMIC

 

545,638

 

 

 

-

 

 

 

(89,248

)

 

 

456,390

 

 

 

13.74

%

Municipal bonds

 

27,140

 

 

 

47

 

 

 

(2,636

)

 

 

24,551

 

 

 

0.74

%

Other securities

 

954

 

 

 

-

 

 

 

-

 

 

 

954

 

 

 

0.03

%

Total available-for-sale securities

$

3,862,216

 

 

$

77

 

 

$

(540,469

)

 

$

3,321,824

 

 

 

100.00

%

Investment securities held-to-maturity:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Government agency/GSE

$

555,777

 

 

$

-

 

 

$

(113,547

)

 

$

442,230

 

 

 

21.73

%

Mortgage-backed securities

 

718,908

 

 

 

-

 

 

 

(111,359

)

 

 

607,549

 

 

 

28.10

%

CMO/REMIC

 

839,971

 

 

 

-

 

 

 

(117,948

)

 

 

722,023

 

 

 

32.84

%

Municipal bonds

 

443,266

 

 

 

8

 

 

 

(64,088

)

 

 

379,186

 

 

 

17.33

%

Total held-to-maturity securities

$

2,557,922

 

 

$

8

 

 

$

(406,942

)

 

$

2,150,988

 

 

 

100.00

%

 

 

December 31, 2021

 

 

Amortized Cost

 

 

Gross Unrealized Holding Gain

 

 

Gross Unrealized Holding Loss

 

 

Fair Value

 

 

Total Percent

 

 

(Dollars in thousands)

 

Investment securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mortgage-backed securities

$

2,553,246

 

 

$

25,873

 

 

$

(15,905

)

 

$

2,563,214

 

 

 

80.50

%

CMO/REMIC

 

602,555

 

 

 

1,586

 

 

 

(13,983

)

 

 

590,158

 

 

 

18.53

%

Municipal bonds

 

28,365

 

 

 

1,103

 

 

 

-

 

 

 

29,468

 

 

 

0.93

%

Other securities

 

1,083

 

 

 

-

 

 

 

-

 

 

 

1,083

 

 

 

0.04

%

Total available-for-sale securities

$

3,185,249

 

 

$

28,562

 

 

$

(29,888

)

 

$

3,183,923

 

 

 

100.00

%

Investment securities held-to-maturity:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Government agency/GSE

$

576,899

 

 

$

5,907

 

 

$

(7,312

)

 

$

575,494

 

 

 

29.95

%

Mortgage-backed securities

 

647,390

 

 

 

4,109

 

 

 

(6,106

)

 

 

645,393

 

 

 

33.61

%

CMO/REMIC

 

490,670

 

 

 

596

 

 

 

(5,030

)

 

 

486,236

 

 

 

25.48

%

Municipal bonds

 

211,011

 

 

 

4,714

 

 

 

(1,155

)

 

 

214,570

 

 

 

10.96

%

Total held-to-maturity securities

$

1,925,970

 

 

$

15,326

 

 

$

(19,603

)

 

$

1,921,693

 

 

 

100.00

%

 

 

Summary of Interest Income Earned on Investment Securities

The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from federal income tax.

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

September 30,

 

 

September 30,

 

 

2022

 

 

2021

 

 

2022

 

 

2021

 

 

(Dollars in thousands)

 

Investment securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

Taxable

$

18,371

 

 

$

9,630

 

 

$

47,883

 

 

$

27,824

 

Tax-advantaged

 

172

 

 

 

183

 

 

 

534

 

 

 

558

 

Total interest income from available-for-sale securities

 

18,543

 

 

 

9,813

 

 

 

48,417

 

 

 

28,382

 

Investment securities held-to-maturity:

 

 

 

 

 

 

 

 

 

 

 

Taxable

 

10,845

 

 

 

4,099

 

 

 

29,927

 

 

 

10,917

 

Tax-advantaged

 

1,989

 

 

 

1,089

 

 

 

5,284

 

 

 

3,341

 

Total interest income from held-to-maturity securities

 

12,834

 

 

 

5,188

 

 

 

35,211

 

 

 

14,258

 

Total interest income from investment securities

$

31,377

 

 

$

15,001

 

 

$

83,628

 

 

$

42,640

 

Summary of Continuous Unrealized Loss Position of Securities

The following table presents the Company’s investment securities, by investment category, in an unrealized loss position for which an allowance for credit losses has not been recorded as of September 30, 2022 and December 31, 2021.

 

 

September 30, 2022

 

 

Less Than 12 Months

 

 

12 Months or Longer

 

 

Total

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

(Dollars in thousands)

 

Investment securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mortgage-backed securities

$

1,889,658

 

 

$

(248,476

)

 

$

948,800

 

 

$

(200,109

)

 

$

2,838,458

 

 

$

(448,585

)

CMO/REMIC

 

59,884

 

 

 

(4,693

)

 

 

396,503

 

 

 

(84,555

)

 

 

456,387

 

 

 

(89,248

)

Municipal bonds

 

23,057

 

 

 

(2,636

)

 

 

-

 

 

 

-

 

 

 

23,057

 

 

 

(2,636

)

Total available-for-sale securities

$

1,972,599

 

 

$

(255,805

)

 

$

1,345,303

 

 

$

(284,664

)

 

$

3,317,902

 

 

$

(540,469

)

Investment securities held-to-maturity:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Government agency/GSE

$

187,453

 

 

$

(39,548

)

 

$

254,777

 

 

$

(73,999

)

 

$

442,230

 

 

$

(113,547

)

Mortgage-backed securities

 

505,153

 

 

 

(86,409

)

 

 

102,395

 

 

 

(24,950

)

 

 

607,548

 

 

 

(111,359

)

CMO/REMIC

 

624,470

 

 

 

(97,023

)

 

 

97,553

 

 

 

(20,925

)

 

 

722,023

 

 

 

(117,948

)

Municipal bonds

 

314,186

 

 

 

(49,463

)

 

 

51,016

 

 

 

(14,625

)

 

 

365,202

 

 

 

(64,088

)

Total held-to-maturity securities

$

1,631,262

 

 

$

(272,443

)

 

$

505,741

 

 

$

(134,499

)

 

$

2,137,003

 

 

$

(406,942

)

 

 

 

December 31, 2021

 

 

Less Than 12 Months

 

 

12 Months or Longer

 

 

Total

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

Fair Value

 

 

Gross Unrealized Holding Losses

 

 

(Dollars in thousands)

 

Investment securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mortgage-backed securities

$

1,465,647

 

 

$

(15,099

)

 

$

44,244

 

 

$

(806

)

 

$

1,509,891

 

 

$

(15,905

)

CMO/REMIC

 

450,393

 

 

 

(11,515

)

 

 

53,745

 

 

 

(2,468

)

 

 

504,138

 

 

 

(13,983

)

Municipal bonds

 

-

 

 

 

-

 

 

 

-

 

 

 

-

 

 

 

-

 

 

 

-

 

Total available-for-sale securities

$

1,916,040

 

 

$

(26,614

)

 

$

97,989

 

 

$

(3,274

)

 

$

2,014,029

 

 

$

(29,888

)

 

Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives which incorporate estimated prepayment speeds.

 

 

September 30, 2022

 

 

Available-for-sale

 

 

Held-to-maturity

 

 

Amortized Cost

 

 

Fair Value

 

 

Amortized Cost

 

 

Fair Value

 

 

 

 

 

(Dollars in thousands)

 

 

 

 

Due in one year or less

$

19,914

 

 

$

19,404

 

 

$

2,842

 

 

$

2,823

 

Due after one year through five years

 

892,491

 

 

 

809,644

 

 

 

645,420

 

 

 

568,453

 

Due after five years through ten years

 

2,610,587

 

 

 

2,213,671

 

 

 

694,667

 

 

 

595,729

 

Due after ten years

 

339,224

 

 

 

279,105

 

 

 

1,214,993

 

 

 

983,983

 

Total investment securities

$

3,862,216

 

 

$

3,321,824

 

 

$

2,557,922

 

 

$

2,150,988