Investments (Tables)
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3 Months Ended |
Mar. 31, 2026 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation |
The following tables present the amortized cost, gross unrealized gains and losses, ACL and fair value of securities available-for-sale and held-to-maturity as of the periods indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | ($ in thousands) | Amortized Cost | | Gross
Unrealized Gains | | Gross
Unrealized Losses | | Fair Value | | Available-for-sale securities: | | | | | | | | | Obligations of U.S. Government-sponsored enterprises | $ | 163,598 | | | $ | 7 | | | $ | (5,259) | | | $ | 158,346 | | | Obligations of states and political subdivisions | 644,842 | | | 1,929 | | | (70,847) | | | 575,924 | | | Agency mortgage-backed securities | 1,910,623 | | | 4,189 | | | (46,222) | | | 1,868,590 | | | U.S. Treasury bills | 151,901 | | | 4 | | | (665) | | | 151,240 | | | Corporate debt securities | 19,448 | | | 213 | | | (94) | | | 19,567 | | | Total securities available-for-sale | $ | 2,890,412 | | | $ | 6,342 | | | $ | (123,087) | | | $ | 2,773,667 | | | Held-to-maturity securities: | | | | | | | | | | | | | | | | | Obligations of states and political subdivisions | $ | 907,676 | | | $ | 5,055 | | | $ | (50,373) | | | $ | 862,358 | | | Agency mortgage-backed securities | 37,244 | | | — | | | (3,262) | | | 33,982 | | | Corporate debt securities | 110,777 | | | 338 | | | (3,934) | | | 107,181 | | | Total securities held-to-maturity | $ | 1,055,697 | | | $ | 5,393 | | | $ | (57,569) | | | $ | 1,003,521 | | | ACL | (202) | | | | | | | | | Total securities held-to-maturity, net | $ | 1,055,495 | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | ($ in thousands) | Amortized Cost | | Gross
Unrealized Gains | | Gross
Unrealized Losses | | Fair Value | | Available-for-sale securities: | | | | | | | | | Obligations of U.S. Government-sponsored enterprises | $ | 187,587 | | | $ | 76 | | | $ | (5,091) | | | $ | 182,572 | | | Obligations of states and political subdivisions | 626,900 | | | 3,914 | | | (58,109) | | | 572,705 | | | Agency mortgage-backed securities | 1,733,003 | | | 12,638 | | | (36,330) | | | 1,709,311 | | | U.S. Treasury Bills | 171,355 | | | 128 | | | (499) | | | 170,984 | | | Corporate debt securities | 19,448 | | | 109 | | | (94) | | | 19,463 | | | Total securities available-for-sale | $ | 2,738,293 | | | $ | 16,865 | | | $ | (100,123) | | | $ | 2,655,035 | | | Held-to-maturity securities: | | | | | | | | | | | | | | | | | Obligations of states and political subdivisions | $ | 920,199 | | | $ | 10,861 | | | $ | (39,849) | | | $ | 891,211 | | | Agency mortgage-backed securities | 43,839 | | | — | | | (3,199) | | | 40,640 | | | Corporate debt securities | 111,064 | | | 325 | | | (3,426) | | | 107,963 | | | Total securities held-to-maturity | $ | 1,075,102 | | | $ | 11,186 | | | $ | (46,474) | | | $ | 1,039,814 | | | ACL | (145) | | | | | | | | | Total securities held-to-maturity, net | $ | 1,074,957 | | | | | | | | | | | | | | | |
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| Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation |
The following tables present the amortized cost, gross unrealized gains and losses, ACL and fair value of securities available-for-sale and held-to-maturity as of the periods indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | ($ in thousands) | Amortized Cost | | Gross
Unrealized Gains | | Gross
Unrealized Losses | | Fair Value | | Available-for-sale securities: | | | | | | | | | Obligations of U.S. Government-sponsored enterprises | $ | 163,598 | | | $ | 7 | | | $ | (5,259) | | | $ | 158,346 | | | Obligations of states and political subdivisions | 644,842 | | | 1,929 | | | (70,847) | | | 575,924 | | | Agency mortgage-backed securities | 1,910,623 | | | 4,189 | | | (46,222) | | | 1,868,590 | | | U.S. Treasury bills | 151,901 | | | 4 | | | (665) | | | 151,240 | | | Corporate debt securities | 19,448 | | | 213 | | | (94) | | | 19,567 | | | Total securities available-for-sale | $ | 2,890,412 | | | $ | 6,342 | | | $ | (123,087) | | | $ | 2,773,667 | | | Held-to-maturity securities: | | | | | | | | | | | | | | | | | Obligations of states and political subdivisions | $ | 907,676 | | | $ | 5,055 | | | $ | (50,373) | | | $ | 862,358 | | | Agency mortgage-backed securities | 37,244 | | | — | | | (3,262) | | | 33,982 | | | Corporate debt securities | 110,777 | | | 338 | | | (3,934) | | | 107,181 | | | Total securities held-to-maturity | $ | 1,055,697 | | | $ | 5,393 | | | $ | (57,569) | | | $ | 1,003,521 | | | ACL | (202) | | | | | | | | | Total securities held-to-maturity, net | $ | 1,055,495 | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | ($ in thousands) | Amortized Cost | | Gross
Unrealized Gains | | Gross
Unrealized Losses | | Fair Value | | Available-for-sale securities: | | | | | | | | | Obligations of U.S. Government-sponsored enterprises | $ | 187,587 | | | $ | 76 | | | $ | (5,091) | | | $ | 182,572 | | | Obligations of states and political subdivisions | 626,900 | | | 3,914 | | | (58,109) | | | 572,705 | | | Agency mortgage-backed securities | 1,733,003 | | | 12,638 | | | (36,330) | | | 1,709,311 | | | U.S. Treasury Bills | 171,355 | | | 128 | | | (499) | | | 170,984 | | | Corporate debt securities | 19,448 | | | 109 | | | (94) | | | 19,463 | | | Total securities available-for-sale | $ | 2,738,293 | | | $ | 16,865 | | | $ | (100,123) | | | $ | 2,655,035 | | | Held-to-maturity securities: | | | | | | | | | | | | | | | | | Obligations of states and political subdivisions | $ | 920,199 | | | $ | 10,861 | | | $ | (39,849) | | | $ | 891,211 | | | Agency mortgage-backed securities | 43,839 | | | — | | | (3,199) | | | 40,640 | | | Corporate debt securities | 111,064 | | | 325 | | | (3,426) | | | 107,963 | | | Total securities held-to-maturity | $ | 1,075,102 | | | $ | 11,186 | | | $ | (46,474) | | | $ | 1,039,814 | | | ACL | (145) | | | | | | | | | Total securities held-to-maturity, net | $ | 1,074,957 | | | | | | | | | | | | | | | |
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| Investments Classified by Contractual Maturity Date |
The amortized cost and estimated fair value of debt securities at March 31, 2026, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The weighted average life of the mortgage-backed securities is approximately five years.
| | | | | | | | | | | | | | | | | | | | | | | | | Available-for-sale | | Held-to-maturity | | ($ in thousands) | Amortized Cost | | Estimated Fair Value | | Amortized Cost | | Estimated Fair Value | | Due in one year or less | $ | 211,537 | | | $ | 210,482 | | | $ | 9,006 | | | $ | 8,951 | | | Due after one year through five years | 58,670 | | | 57,058 | | | 128,789 | | | 125,519 | | | Due after five years through ten years | 407,788 | | | 361,420 | | | 258,215 | | | 253,174 | | | Due after ten years | 301,793 | | | 276,117 | | | 622,442 | | | 581,895 | | | Agency mortgage-backed securities | 1,910,624 | | | 1,868,590 | | | 37,245 | | | 33,982 | | | | | | | | | | | | $ | 2,890,412 | | | $ | 2,773,667 | | | $ | 1,055,697 | | | $ | 1,003,521 | | | | | | | | | |
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| Schedule of Unrealized Loss on Investments |
The following tables present a summary of available-for-sale investment securities in an unrealized loss position as of the periods indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | Less than 12 months | | 12 months or more | | Total | | ($ in thousands) | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Obligations of U.S. Government-sponsored enterprises | $ | 44,031 | | | $ | 501 | | | $ | 110,557 | | | $ | 4,758 | | | $ | 154,588 | | | $ | 5,259 | | | Obligations of states and political subdivisions | 63,987 | | | 1,146 | | | 413,355 | | | 69,701 | | | 477,342 | | | 70,847 | | | Agency mortgage-backed securities | 764,440 | | | 9,086 | | | 362,330 | | | 37,136 | | | 1,126,770 | | | 46,222 | | | U.S. Treasury bills | 87,754 | | | 90 | | | 35,354 | | | 575 | | | 123,108 | | | 665 | | | Corporate debt securities | — | | | — | | | 3,406 | | | 94 | | | 3,406 | | | 94 | | | | $ | 960,212 | | | $ | 10,823 | | | $ | 925,002 | | | $ | 112,264 | | | $ | 1,885,214 | | | $ | 123,087 | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Less than 12 months | | 12 months or more | | Total | | ($ in thousands) | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Obligations of U.S. Government-sponsored enterprises | $ | 13,971 | | | $ | 22 | | | $ | 149,230 | | | $ | 5,069 | | | $ | 163,201 | | | $ | 5,091 | | | Obligations of states and political subdivisions | 32,658 | | | 245 | | | 425,879 | | | 57,864 | | | 458,537 | | | 58,109 | | | Agency mortgage-backed securities | 266,639 | | | 1,215 | | | 377,787 | | | 35,115 | | | 644,426 | | | 36,330 | | | U.S. Treasury bills | 4,996 | | | — | | | 40,418 | | | 499 | | | 45,414 | | | 499 | | | Corporate debt securities | — | | | — | | | 3,406 | | | 94 | | | 3,406 | | | 94 | | | | $ | 318,264 | | | $ | 1,482 | | | $ | 996,720 | | | $ | 98,641 | | | $ | 1,314,984 | | | $ | 100,123 | | | | | | | | | | | | | |
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