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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Held-to-Maturity Amortized Cost and Fair Value | A summary of the amortized cost, fair value and allowance for credit losses related to securities held-to-maturity as of September 30, 2025 and December 31, 2024 is presented below.
Held-to-maturity: | Amortized Cost 1 | Allowance for Credit Losses | Net Carrying Amount | Gross Unrealized | Fair Value |
(in thousands) | Gains | (Losses) |
September 30, 2025 |  |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 237,757 |  | $ | — |  | $ | 237,757 |  | $ | — |  | $ | (26,472) |  | $ | 211,285 |  |
CMOs issued by FHLMC, FNMA and GNMA | 194,734 |  | — |  | 194,734 |  | 91 |  | (12,490) |  | 182,335 |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 180,148 |  | — |  | 180,148 |  | — |  | (23,771) |  | 156,377 |  |
SBA-backed securities | 1,252 |  | — |  | 1,252 |  | — |  | (28) |  | 1,224 |  |
Debentures of government-sponsored agencies | 121,656 |  | — |  | 121,656 |  | — |  | (17,028) |  | 104,628 |  |
Obligations of state and political subdivisions | 61,204 |  | — |  | 61,204 |  | 12 |  | (6,973) |  | 54,243 |  |
Corporate bonds | 15,000 |  | — |  | 15,000 |  | — |  | (285) |  | 14,715 |  |
Total held-to-maturity | $ | 811,751 |  | $ | — |  | $ | 811,751 |  | $ | 103 |  | $ | (87,047) |  | $ | 724,807 |  |
December 31, 2024 |  |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 242,559 |  | $ | — |  | $ | 242,559 |  | $ | — |  | $ | (34,449) |  | $ | 208,110 |  |
CMOs issued by FHLMC, FNMA and GNMA | 209,748 |  | — |  | 209,748 |  | — |  | (18,492) |  | 191,256 |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 192,388 |  | — |  | 192,388 |  | — |  | (30,942) |  | 161,446 |  |
SBA-backed securities | 1,513 |  | — |  | 1,513 |  | — |  | (61) |  | 1,452 |  |
Debentures of government-sponsored agencies | 141,431 |  | — |  | 141,431 |  | — |  | (22,694) |  | 118,737 |  |
Obligations of state and political subdivisions | 61,560 |  | — |  | 61,560 |  | — |  | (8,341) |  | 53,219 |  |
Corporate bonds | 30,000 |  | — |  | 30,000 |  | — |  | (685) |  | 29,315 |  |
Total held-to-maturity | $ | 879,199 |  | $ | — |  | $ | 879,199 |  | $ | — |  | $ | (115,664) |  | $ | 763,535 |  |
1 Amortized cost and fair values exclude accrued interest receivable of $2.2 million and $3.4 million at September 30, 2025 and December 31, 2024, respectively, which is included in interest receivable and other assets in the consolidated statements of condition. |
Schedule of Bond Ratings for Held-to-Maturity Securities | The following table summarizes the amortized cost of our portfolio of held-to-maturity securities issued by states and political subdivisions and corporate bonds by Moody's and/or Standard & Poor's bond ratings as of September 30, 2025 and December 31, 2024.
| Obligations of state and political subdivisions | Corporate bonds |  |  |  |
(in thousands) | September 30, 2025 | December 31, 2024 | September 30, 2025 | December 31, 2024 |  |  |  |
Aaa / AAA | $ | 38,388 |  | $ | 42,161 |  | $ | — |  | $ | — |  |  |  |  |
Aa1 / AA+ | 22,816 |  | 19,399 |  | — |  | — |  |  |  |  |
A2 / A | — |  | — |  | 15,000 |  | 30,000 |  |  |  |  |
Total | $ | 61,204 |  | $ | 61,560 |  | $ | 15,000 |  | $ | 30,000 |  |  |  |  |
Schedule of Available-for-Sale Securities Amortized Cost and Fair Value | A summary of the amortized cost, fair value and allowance for credit losses related to securities available-for-sale as of September 30, 2025 and December 31, 2024 is presented below.
Available-for-sale: | Amortized Cost 1 | Gross Unrealized | Allowance for Credit Losses | Fair Value
(in thousands) | Gains | (Losses)
September 30, 2025 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 246,548 |  | $ | 790 |  | $ | (635) |  | $ | — |  | $ | 246,703 |
CMOs issued by FHLMC, FNMA and GNMA | 162,809 |  | 543 |  | (1,214) |  | — |  | 162,138 |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 108,182 |  | 340 |  | (2,440) |  | — |  | 106,082 |
Obligations of state and political subdivisions | 33,772 |  | — |  | (5,090) |  | — |  | 28,682 |
Total available-for-sale | $ | 551,311 |  | $ | 1,673 |  | $ | (9,379) |  | $ | — |  | $ | 543,605 |
December 31, 2024 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 222,862 |  | $ | 154 |  | $ | (4,977) |  | $ | — |  | 218,039 |
CMOs issued by FHLMC, FNMA and GNMA | 42,432 |  | 28 |  | (6,321) |  | — |  | 36,139 |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 30,498 |  | 2 |  | (4,840) |  | $ | — |  | 25,660 |
SBA-backed securities | 331 |  | — |  | (23) |  | — |  | 308 |
Debentures of government- sponsored agencies | 8,971 |  | — |  | (1,761) |  | — |  | 7,210 |
U.S. Treasury securities | 12,020 |  | — |  | (1,205) |  |  | 10,815 |
Obligations of state and political subdivisions | 96,178 |  | — |  | (12,464) |  | — |  | 83,714 |
Corporate bonds | 6,000 |  | — |  | (351) |  | — |  | 5,649 |
Total available-for-sale | $ | 419,292 |  | $ | 184 |  | $ | (31,942) |  | $ | — |  | $ | 387,534 |
1 Amortized cost and fair value exclude accrued interest receivable of $1.8 million and $1.7 million at September 30, 2025 and December 31, 2024, respectively, which is included in interest receivable and other assets in the consolidated statements of condition.
Schedule of Investments Classified by Contractual Maturity Date | The amortized cost a nd fair value of investment debt securities by contractual maturity at September 30, 2025 and December 31, 2024 are shown below. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties.
| September 30, 2025 |  | December 31, 2024
| Held-to-Maturity |  | Available-for-Sale |  | Held-to-Maturity |  | Available-for-Sale
(in thousands) | Amortized Cost | Fair Value |  | Amortized Cost | Fair Value |  | Amortized Cost | Fair Value |  | Amortized Cost | Fair Value
Within one year | $ | 12,952 |  | $ | 12,853 |  |  | $ | 40,067 |  | $ | 40,026 |  |  | $ | 36,476 |  | $ | 36,380 |  |  | $ | 99,431 |  | $ | 99,258 |
After one but within five years | 127,497 |  | 120,616 |  |  | 119,088 |  | 119,537 |  |  | 118,590 |  | 110,857 |  |  | 106,986 |  | 103,058 |
After five years through ten years | 217,568 |  | 190,411 |  |  | 119,044 |  | 119,034 |  |  | 229,040 |  | 191,328 |  |  | 75,429 |  | 67,940 |
After ten years | 453,734 |  | 400,927 |  |  | 273,112 |  | 265,008 |  |  | 495,093 |  | 424,970 |  |  | 137,446 |  | 117,278 |
Total | $ | 811,751 |  | $ | 724,807 |  |  | $ | 551,311 |  | $ | 543,605 |  |  | $ | 879,199 |  | $ | 763,535 |  |  | $ | 419,292 |  | $ | 387,534 |
Schedule of Sale of Investment Securities and Gross Gains and Losses | Sales of investment securities and gross gains and losses are shown in the following table:
| Three months ended |  | Nine months ended
(in thousands) | September 30, 2025 | September 30, 2024 |  | September 30, 2025 | September 30, 2024
Available-for-sale: |  |  |  |  |
Sales proceeds | $ | — |  | $ | — |  |  | $ | 167,017 |  | $ | 292,621 |
Gross realized losses | — |  | — |  |  | (18,736) |  | (32,541) |
Schedule of Financial Instruments Owned and Pledged as Collateral | The reported values of pledged investment securities are shown in the following table.
(in thousands) | September 30, 2025 | December 31, 2024
Pledged to the State of California: |  |
Secure public deposits in compliance with the Local Agency Security Program | $ | 319,454 |  | $ | 288,385 |
Collateral for trust deposits | 1,200 |  | 1,284 |
Collateral for Wealth Management and Trust Services checking account | 1,500 |  | 895 |
Total investment securities pledged to the State of California | 322,154 |  | 290,564 |
Bankruptcy trustee deposits pledged with Federal Reserve Bank | 2,138 |  | 651 |
Pledged to FHLB Securities-Backed Credit Program | 269,768 |  | 284,148 |
Pledged to the Federal Reserve Discount Window | 319,109 |  | 365,759 |
Total pledged investment securities | $ | 913,169 |  | $ | 941,122 |
Schedule of Unrealized Loss on Investments | Those securities are summarized and classified according to the duration of the loss period in the tables below:
September 30, 2025 | < 12 continuous months |  | ≥ 12 continuous months |  | Total securities in a loss position
(in thousands) | Fair value | Unrealized loss |  | Fair value | Unrealized loss |  | Fair value | Unrealized loss
Held-to-maturity: |  |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | — |  | $ | — |  |  | $ | 211,285 |  | $ | (26,472) |  |  | $ | 211,285 |  | $ | (26,472) |
CMOs issued by FHLMC, FNMA and GNMA | — |  | — |  |  | 172,617 |  | (12,490) |  |  | 172,617 |  | (12,490) |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | — |  | — |  |  | 156,094 |  | (23,771) |  |  | 156,094 |  | (23,771) |
SBA-backed securities | — |  | — |  |  | 1,224 |  | (28) |  |  | 1,224 |  | (28) |
Debentures of government-sponsored agencies | — |  | — |  |  | 104,628 |  | (17,028) |  |  | 104,628 |  | (17,028) |
Obligations of state and political subdivisions | — |  | — |  |  | 51,206 |  | (6,973) |  |  | 51,206 |  | (6,973) |
Corporate bonds | — |  | — |  |  | 14,715 |  | (285) |  |  | 14,715 |  | (285) |
Total held-to-maturity | — |  | — |  |  | 711,769 |  | (87,047) |  |  | 711,769 |  | (87,047) |
Available-for-sale: |  |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 94,823 |  | $ | (165) |  |  | $ | 27,965 |  | $ | (470) |  |  | $ | 122,788 |  | $ | (635) |
CMOs issued by FHLMC, FNMA and GNMA | 54,133 |  | (645) |  |  | 3,273 |  | (569) |  |  | 57,406 |  | (1,214) |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 47,098 |  | (175) |  |  | 11,936 |  | (2,265) |  |  | 59,034 |  | (2,440) |
Obligations of state and political subdivisions | 247 |  | (3) |  |  | 28,434 |  | (5,087) |  |  | 28,682 |  | (5,090) |
Total available-for-sale | 196,301 |  | (988) |  |  | 71,608 |  | (8,391) |  |  | 267,910 |  | (9,379) |
Total securities at loss position | $ | 196,301 |  | $ | (988) |  |  | $ | 783,377 |  | $ | (95,438) |  |  | $ | 979,679 |  | $ | (96,426) |
December 31, 2024 | < 12 continuous months |  | ≥ 12 continuous months |  | Total securities in a loss position
(in thousands) | Fair value | Unrealized loss |  | Fair value | Unrealized loss |  | Fair value | Unrealized loss
Held-to-maturity: |  |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | — |  | $ | — |  |  | $ | 208,110 |  | $ | (34,449) |  |  | $ | 208,110 |  | $ | (34,449) |
CMOs issued by FHLMC, FNMA and GNMA | 18,451 |  | (1,623) |  |  | 172,805 |  | (16,869) |  |  | 191,256 |  | (18,492) |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 3,487 |  | (150) |  |  | 157,959 |  | (30,792) |  |  | 161,446 |  | (30,942) |
SBA-backed securities | — |  | — |  |  | 1,452 |  | (61) |  |  | 1,452 |  | (61) |
Debentures of government- sponsored agencies | — |  | — |  |  | 118,737 |  | (22,694) |  |  | 118,737 |  | (22,694) |
Obligations of state and political subdivisions | 5,558 |  | (44) |  |  | 47,661 |  | (8,297) |  |  | 53,219 |  | (8,341) |
Corporate Bonds | — |  | — |  |  | 29,315 |  | (685) |  |  | 29,315 |  | (685) |
Total held-to-maturity | 27,496 |  | (1,817) |  |  | 736,039 |  | (113,847) |  |  | 763,535 |  | (115,664) |
Available-for-sale: |  |  |  |  |  |  |  |
CMBS issued by FHLMC, FNMA and GNMA | $ | 129,402 |  | $ | (343) |  |  | $ | 58,065 |  | $ | (4,634) |  |  | $ | 187,467 |  | $ | (4,977) |
CMOs issued by FHLMC, FNMA and GNMA | — |  | — |  |  | 33,749 |  | (6,321) |  |  | 33,749 |  | (6,321) |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 7 |  | — |  |  | 25,495 |  | (4,840) |  |  | 25,502 |  | (4,840) |
SBA-backed securities | — |  | — |  |  | 309 |  | (23) |  |  | 309 |  | (23) |
Debentures of government- sponsored agencies | — |  | — |  |  | 7,210 |  | (1,761) |  |  | 7,210 |  | (1,761) |
U.S. Treasury securities | — |  | — |  |  | 10,815 |  | (1,205) |  |  | 10,815 |  | (1,205) |
Obligations of state and political subdivisions | — |  | — |  |  | 83,714 |  | (12,464) |  |  | 83,714 |  | (12,464) |
Corporate Bonds | — |  | — |  |  | 5,649 |  | (351) |  |  | 5,649 |  | (351) |
Total available-for-sale | 129,409 |  | (343) |  |  | 225,006 |  | (31,599) |  |  | 354,415 |  | (31,942) |
Total securities at loss position | $ | 156,905 |  | $ | (2,160) |  |  | $ | 961,045 |  | $ | (145,446) |  |  | $ | 1,117,950 |  | $ | (147,606) |

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- Definition Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481444/860-30-45-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
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