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v3.25.1

Securities (Tables) | 3 Months Ended
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Mar. 31, 2025
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities Available for Sale |
| March 31, 2025 |  | December 31, 2024 |
|  |  | Gross |  | Gross |  |  |  |  |  | Gross |  | Gross |  |  |
Securities Available for Sale | Amortized |  | Unrealized |  | Unrealized |  | Fair |  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
($ in thousands) | Cost |  | Gains |  | Losses |  | Value |  | Cost |  | Gains |  | Losses |  | Value |
U.S. Treasury and government agency securities | $ | 208,408 |  | $ | 2,303 |  | $ | 1,651 |  | $ | 209,060 |  | $ | 185,827 |  | $ | 349 |  | $ | 3,894 |  | $ | 182,282 |
Municipal obligations |  | 197,366 |  |  | 2 |  |  | 3,640 |  |  | 193,728 |  |  | 200,272 |  |  | — |  |  | 3,942 |  |  | 196,330 |
Residential mortgage-backed securities |  | 2,505,037 |  |  | 4,200 |  |  | 311,852 |  |  | 2,197,385 |  |  | 2,482,109 |  |  | 496 |  |  | 353,554 |  |  | 2,129,051 |
Commercial mortgage-backed securities |  | 2,882,206 |  |  | 7,645 |  |  | 204,652 |  |  | 2,685,199 |  |  | 2,849,372 |  |  | 2,185 |  |  | 250,592 |  |  | 2,600,965 |
Collateralized mortgage obligations |  | 34,528 |  |  | — |  |  | 1,824 |  |  | 32,704 |  |  | 37,553 |  |  | — |  |  | 2,306 |  |  | 35,247 |
Corporate debt securities |  | 17,500 |  |  | — |  |  | 1,048 |  |  | 16,452 |  |  | 19,000 |  |  | — |  |  | 1,384 |  |  | 17,616 |
Total | $ | 5,845,045 |  | $ | 14,150 |  | $ | 524,667 |  | $ | 5,334,528 |  | $ | 5,774,133 |  | $ | 3,030 |  | $ | 615,672 |  | $ | 5,161,491 |
Amortized Cost and Fair Value of Debt Securities Held to Maturity |
| March 31, 2025 |  | December 31, 2024 |
|  |  | Gross |  | Gross |  |  |  |  |  | Gross |  | Gross |  |  |
Securities Held to Maturity | Amortized |  | Unrealized |  | Unrealized |  | Fair |  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
($ in thousands) | Cost |  | Gains |  | Losses |  | Value |  | Cost |  | Gains |  | Losses |  | Value |
U.S. Treasury and government agency securities | $ | 389,904 |  | $ | 221 |  | $ | 37,288 |  | $ | 352,837 |  | $ | 394,689 |  | $ | — |  | $ | 45,876 |  | $ | 348,813 |
Municipal obligations |  | 585,857 |  |  | 61 |  |  | 17,395 |  |  | 568,523 |  |  | 623,907 |  |  | 169 |  |  | 20,867 |  |  | 603,209 |
Residential mortgage-backed securities |  | 553,972 |  |  | — |  |  | 49,163 |  |  | 504,809 |  |  | 573,057 |  |  | — |  |  | 61,525 |  |  | 511,532 |
Commercial mortgage-backed securities |  | 806,954 |  |  | — |  |  | 61,296 |  |  | 745,658 |  |  | 818,604 |  |  | — |  |  | 72,854 |  |  | 745,750 |
Collateralized mortgage obligations |  | 23,754 |  |  | — |  |  | 954 |  |  | 22,800 |  |  | 25,406 |  |  | — |  |  | 1,184 |  |  | 24,222 |
Total | $ | 2,360,441 |  | $ | 282 |  | $ | 166,096 |  | $ | 2,194,627 |  | $ | 2,435,663 |  | $ | 169 |  | $ | 202,306 |  | $ | 2,233,526 |
Available for Sale Securities [Member] |
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity |
Debt Securities Available for Sale |  | Amortized |  |  | Fair |
($ in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 31,863 |  |  | $ | 31,963 |
Due after one year through five years |  |  | 971,094 |  |  |  | 950,634 |
Due after five years through ten years |  |  | 2,336,366 |  |  |  | 2,146,246 |
Due after ten years |  |  | 2,505,722 |  |  |  | 2,205,685 |
Total available for sale debt securities |  | $ | 5,845,045 |  |  | $ | 5,334,528 |
Securities with Unrealized Losses | The fair value and gross unrealized losses for securities classified as available for sale with unrealized losses for the periods indicated follow.
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2025 |  | Losses < 12 months |  |  | Losses 12 months or > |  |  | Total |
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |
U.S. Treasury and government agency securities |  | $ | 17,540 |  | $ | 206 |  |  | $ | 7,115 |  | $ | 1,445 |  |  | $ | 24,655 |  | $ | 1,651 |
Municipal obligations |  |  | 18,742 |  |  | 127 |  |  |  | 167,611 |  |  | 3,513 |  |  |  | 186,353 |  |  | 3,640 |
Residential mortgage-backed securities |  |  | 138,747 |  |  | 718 |  |  |  | 1,543,488 |  |  | 311,134 |  |  |  | 1,682,235 |  |  | 311,852 |
Commercial mortgage-backed securities |  |  | 72,632 |  |  | 531 |  |  |  | 2,191,851 |  |  | 204,121 |  |  |  | 2,264,483 |  |  | 204,652 |
Collateralized mortgage obligations |  |  | — |  |  | — |  |  |  | 32,704 |  |  | 1,824 |  |  |  | 32,704 |  |  | 1,824 |
Corporate debt securities |  |  | — |  |  | — |  |  |  | 14,452 |  |  | 1,048 |  |  |  | 14,452 |  |  | 1,048 |
Total |  | $ | 247,661 |  | $ | 1,582 |  |  | $ | 3,957,221 |  | $ | 523,085 |  |  | $ | 4,204,882 |  | $ | 524,667 |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2024 |  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |
U.S. Treasury and government agency securities |  | $ | 130,453 |  | $ | 2,243 |  |  | $ | 7,247 |  | $ | 1,651 |  |  | $ | 137,700 |  | $ | 3,894 |
Municipal obligations |  |  | 24,149 |  |  | 247 |  |  |  | 170,110 |  |  | 3,695 |  |  |  | 194,259 |  |  | 3,942 |
Residential mortgage-backed securities |  |  | 347,772 |  |  | 2,935 |  |  |  | 1,554,001 |  |  | 350,619 |  |  |  | 1,901,773 |  |  | 353,554 |
Commercial mortgage-backed securities |  |  | 184,534 |  |  | 2,738 |  |  |  | 2,139,191 |  |  | 247,854 |  |  |  | 2,323,725 |  |  | 250,592 |
Collateralized mortgage obligations |  |  | — |  |  | — |  |  |  | 35,247 |  |  | 2,306 |  |  |  | 35,247 |  |  | 2,306 |
Corporate debt securities |  |  | — |  |  | — |  |  |  | 15,616 |  |  | 1,384 |  |  |  | 15,616 |  |  | 1,384 |
Total |  | $ | 686,908 |  | $ | 8,163 |  |  | $ | 3,921,412 |  | $ | 607,509 |  |  | $ | 4,608,320 |  | $ | 615,672 |
Held-to-maturity Securities [Member] |
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity |
Debt Securities Held to Maturity |  | Amortized |  |  | Fair |
($ in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 110,832 |  |  | $ | 110,453 |
Due after one year through five years |  |  | 764,462 |  |  |  | 733,857 |
Due after five years through ten years |  |  | 536,603 |  |  |  | 505,119 |
Due after ten years |  |  | 948,544 |  |  |  | 845,198 |
Total held to maturity securities |  | $ | 2,360,441 |  |  | $ | 2,194,627 |
Securities with Unrealized Losses | The fair value and gross unrealized losses for securities classified as held to maturity with unrealized losses for the periods indicated follow.
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2025 |  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |
U.S. Treasury and government agency securities |  | $ | 9,196 |  | $ | 36 |  |  | $ | 324,368 |  | $ | 37,252 |  |  | $ | 333,564 |  | $ | 37,288 |
Municipal obligations |  |  | 88,964 |  |  | 302 |  |  |  | 468,359 |  |  | 17,093 |  |  |  | 557,323 |  |  | 17,395 |
Residential mortgage-backed securities |  |  | — |  |  | — |  |  |  | 504,809 |  |  | 49,163 |  |  |  | 504,809 |  |  | 49,163 |
Commercial mortgage-backed securities |  |  | — |  |  | — |  |  |  | 745,658 |  |  | 61,296 |  |  |  | 745,658 |  |  | 61,296 |
Collateralized mortgage obligations |  |  | — |  |  | — |  |  |  | 22,800 |  |  | 954 |  |  |  | 22,800 |  |  | 954 |
Total |  | $ | 98,160 |  | $ | 338 |  |  | $ | 2,065,994 |  | $ | 165,758 |  |  | $ | 2,164,154 |  | $ | 166,096 |
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2024 |  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |  |  | Fair Value |  | Gross Unrealized Losses |
U.S. Treasury and government agency securities |  | $ | 27,660 |  | $ | 840 |  |  | $ | 321,154 |  | $ | 45,036 |  |  | $ | 348,814 |  | $ | 45,876 |
Municipal obligations |  |  | 82,028 |  |  | 451 |  |  |  | 497,999 |  |  | 20,416 |  |  |  | 580,027 |  |  | 20,867 |
Residential mortgage-backed securities |  |  | — |  |  | — |  |  |  | 511,531 |  |  | 61,525 |  |  |  | 511,531 |  |  | 61,525 |
Commercial mortgage-backed securities |  |  | — |  |  | — |  |  |  | 745,750 |  |  | 72,854 |  |  |  | 745,750 |  |  | 72,854 |
Collateralized mortgage obligations |  |  | — |  |  | — |  |  |  | 24,222 |  |  | 1,184 |  |  |  | 24,222 |  |  | 1,184 |
Total |  | $ | 109,688 |  | $ | 1,291 |  |  | $ | 2,100,656 |  | $ | 201,015 |  |  | $ | 2,210,344 |  | $ | 202,306 |

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