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Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Summary of Held-to-Maturity Investments | A summary of the amortized cost, fair value and allowance for credit losses related to securities held-to-maturity as of June 30, 2023 and December 31, 2022 is presented below.
Held-to-maturity: | Amortized Cost 1 | Allowance for Credit Losses | Net Carrying Amount | Gross Unrealized | Fair Value |
(in thousands) | Gains | (Losses) |
June 30, 2023 |  |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 316,968 |  | $ | — |  | $ | 316,968 |  | $ | — |  | $ | (48,904) |  | $ | 268,064 |  |
CMOs issued by FHLMC | 231,217 |  | — |  | 231,217 |  | 177 |  | (27,759) |  | 203,635 |  |
CMOs issued by FNMA | 106,894 |  | — |  | 106,894 |  | 113 |  | (6,436) |  | 100,571 |  |
CMOs issued by GNMA | 51,511 |  | — |  | 51,511 |  | 216 |  | (3,271) |  | 48,456 |  |
SBA-backed securities | 1,977 |  | — |  | 1,977 |  | — |  | (130) |  | 1,847 |  |
Debentures of government-sponsored agencies | 145,973 |  | — |  | 145,973 |  | — |  | (24,087) |  | 121,886 |  |
Obligations of state and political subdivisions | 62,268 |  | — |  | 62,268 |  | 6 |  | (9,029) |  | 53,245 |  |
Corporate bonds | 30,000 |  | — |  | 30,000 |  | — |  | (1,637) |  | 28,363 |  |
Total held-to-maturity | $ | 946,808 |  | $ | — |  | $ | 946,808 |  | $ | 512 |  | $ | (121,253) |  | $ | 826,067 |  |
December 31, 2022 |  |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 331,281 |  | $ | — |  | $ | 331,281 |  | $ | — |  | $ | (50,147) |  | $ | 281,134 |  |
CMOs issued by FHLMC | 235,971 |  | — |  | 235,971 |  | 59 |  | (29,503) |  | 206,527 |  |
CMOs issued by FNMA | 111,904 |  | — |  | 111,904 |  | — |  | (5,419) |  | 106,485 |  |
CMOs issued by GNMA | 52,356 |  | — |  | 52,356 |  | 11 |  | (3,076) |  | 49,291 |  |
SBA-backed securities | 2,372 |  | — |  | 2,372 |  | — |  | (133) |  | 2,239 |  |
Debentures of government-sponsored agencies | 145,823 |  | — |  | 145,823 |  | — |  | (26,467) |  | 119,356 |  |
Obligations of state and political subdivisions | 62,500 |  | — |  | 62,500 |  | — |  | (10,741) |  | 51,759 |  |
Corporate bonds | 30,000 |  | — |  | 30,000 |  | — |  | (1,552) |  | 28,448 |  |
Total held-to-maturity | $ | 972,207 |  | $ | — |  | $ | 972,207 |  | $ | 70 |  | $ | (127,038) |  | $ | 845,239 |  |
1 Amortized cost and fair values exclude accrued interest receivable of $3.6 million and $3.7 million at June 30, 2023 and December 31, 2022, 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 June 30, 2023.
| Obligations of state and political subdivisions | Corporate bonds |  |  |  |
(in thousands) | June 30, 2023 | December 31, 2022 | June 30, 2023 | December 31, 2022 |  |  |  |
AAA / Aaa | $ | 42,783 |  | $ | 42,986 |  | $ | — |  | $ | — |  |  |  |  |
AA / Aa | 19,485 |  | 19,514 |  | — |  | — |  |  |  |  |
A2 / A | — |  | — |  | 30,000 |  | 30,000 |  |  |  |  |
Total | $ | 62,268 |  | $ | 62,500 |  | $ | 30,000 |  | $ | 30,000 |  |  |  |  |
Summary of Available-for-Sale Investments | A summary of the amortized cost, fair value and allowance for credit losses related to securities available-for-sale as of June 30, 2023 and December 31, 2022 is presented below.
Available-for-sale: | Amortized Cost 1 | Gross Unrealized | Allowance for Credit Losses | Fair Value
(in thousands) | Gains | (Losses)
June 30, 2023 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 102,420 |  | $ | 2 |  | $ | (11,758) |  | $ | — |  | $ | 90,664 |
CMOs issued by FHLMC | 333,374 |  | — |  | (32,162) |  | — |  | 301,212 |
CMOs issued by FNMA | 32,916 |  | — |  | (3,816) |  | — |  | 29,100 |
CMOs issued by GNMA | 32,193 |  | 31 |  | (3,377) |  | — |  | 28,847 |
SBA-backed securities | 39,824 |  | — |  | (3,175) |  | — |  | 36,649 |
Debentures of government- sponsored agencies | 149,129 |  | — |  | (13,261) |  | — |  | 135,868 |
U.S. Treasury securities | 11,914 |  | — |  | (1,580) |  | — |  | 10,334 |
Obligations of state and political subdivisions | 116,040 |  | 36 |  | (13,160) |  | — |  | 102,916 |
Corporate bonds | 36,991 |  | — |  | (2,948) |  | — |  | 34,043 |
Asset-backed securities | 1,365 |  | — |  | (56) |  | — |  | 1,309 |
Total available-for-sale | $ | 856,166 |  | $ | 69 |  | $ | (85,293) |  | $ | — |  | $ | 770,942 |
December 31, 2022 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 109,736 |  | $ | 3 |  | $ | (12,133) |  | $ | — |  | $ | 97,606 |
CMOs issued by FHLMC | 347,437 |  | — |  | (33,682) |  | — |  | 313,755 |
CMOs issued by FNMA | 36,172 |  | — |  | (3,852) |  | — |  | 32,320 |
CMOs issued by GNMA | 35,120 |  | — |  | (3,296) |  | — |  | 31,824 |
SBA-backed securities | 47,724 |  | 2 |  | (3,371) |  | — |  | 44,355 |
Debentures of government- sponsored agencies | 149,114 |  | — |  | (14,008) |  | — |  | 135,106 |
U.S. Treasury securities | 11,904 |  | — |  | (1,635) |  |  | 10,269 |
Obligations of state and political subdivisions | 116,855 |  | 29 |  | (14,761) |  | — |  | 102,123 |
Corporate bonds | 36,990 |  | — |  | (3,714) |  | — |  | 33,276 |
Asset-backed securities | 1,553 |  | — |  | (91) |  | — |  | 1,462 |
Total available-for-sale | $ | 892,605 |  | $ | 34 |  | $ | (90,543) |  | $ | — |  | $ | 802,096 |
1 Amortized cost and fair value exclude accrued interest receivable of $3.1 million and $3.2 million at June 30, 2023 and December 31, 2022, 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 June 30, 2023 and December 31, 2022 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.
| June 30, 2023 |  | December 31, 2022
| 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 | $ | — |  | $ | — |  |  | $ | 26,665 |  | $ | 25,344 |  |  | $ | 450 |  | $ | 446 |  |  | $ | 1,254 |  | $ | 1,239 |
After one but within five years | 89,625 |  | 85,060 |  |  | 354,735 |  | 324,368 |  |  | 87,418 |  | 83,663 |  |  | 335,813 |  | 307,843 |
After five years through ten years | 266,785 |  | 227,818 |  |  | 130,738 |  | 117,530 |  |  | 262,072 |  | 222,280 |  |  | 185,997 |  | 166,273 |
After ten years | 590,398 |  | 513,189 |  |  | 344,028 |  | 303,700 |  |  | 622,267 |  | 538,850 |  |  | 369,541 |  | 326,741 |
Total | $ | 946,808 |  | $ | 826,067 |  |  | $ | 856,166 |  | $ | 770,942 |  |  | $ | 972,207 |  | $ | 845,239 |  |  | $ | 892,605 |  | $ | 802,096 |
Schedule of Financial Instruments Owned and Pledged as Collateral | The carrying values of pledged investment securities are shown in the following table:
(in thousands) | June 30, 2023 | December 31, 2022
Pledged to the State of California: |  |
Secure public deposits in compliance with the Local Agency Security Program | $ | 199,327 |  | $ | 235,587 |
Collateral for trust deposits | 672 |  | 677 |
Collateral for Wealth Management and Trust Services checking account | 565 |  | 569 |
Total investment securities pledged to the State of California | 200,564 |  | 236,833 |
Bankruptcy trustee deposits pledged with Federal Reserve Bank | 1,594 |  | 1,737 |
Pledged to FHLB Securities-Backed Credit Program | 391,668 |  | — |
Pledged to the Federal Reserve Bank Term Funding Program ("BTFP") | 274,215 |  | — |
Total pledged investment securities | $ | 868,041 |  | $ | 238,570 |
Schedule of Unrealized Loss on Investments | Those securities are summarized and classified according to the duration of the loss period in the tables below:
June 30, 2023 | < 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: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 4,178 |  | $ | (132) |  |  | $ | 263,886 |  | $ | (48,772) |  |  | $ | 268,064 |  | $ | (48,904) |
CMOs issued by FHLMC | 31,915 |  | (1,171) |  |  | 162,369 |  | (26,588) |  |  | 194,284 |  | (27,759) |
CMOs issued by FNMA | 43,167 |  | (2,064) |  |  | 39,161 |  | (4,372) |  |  | 82,328 |  | (6,436) |
CMOs issued by GNMA | 27,024 |  | (1,895) |  |  | 9,902 |  | (1,376) |  |  | 36,926 |  | (3,271) |
SBA-backed securities | — |  | — |  |  | 1,847 |  | (130) |  |  | 1,847 |  | (130) |
Debentures of government-sponsored agencies | 29,245 |  | (749) |  |  | 92,642 |  | (23,338) |  |  | 121,887 |  | (24,087) |
Obligations of state and political subdivisions | — |  | — |  |  | 50,154 |  | (9,029) |  |  | 50,154 |  | (9,029) |
Corporate bonds | — |  | — |  |  | 28,363 |  | (1,637) |  |  | 28,363 |  | (1,637) |
Total held-to-maturity | 135,529 |  | (6,011) |  |  | 648,324 |  | (115,242) |  |  | 783,853 |  | (121,253) |
Available-for-sale: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 4,422 |  | (177) |  |  | 85,498 |  | (11,581) |  |  | 89,920 |  | (11,758) |
CMOs issued by FHLMC | 12 |  | — |  |  | 301,200 |  | (32,162) |  |  | 301,212 |  | (32,162) |
CMOs issued by FNMA | 37 |  | (1) |  |  | 29,063 |  | (3,815) |  |  | 29,100 |  | (3,816) |
CMOs issued by GNMA | — |  | — |  |  | 25,070 |  | (3,377) |  |  | 25,070 |  | (3,377) |
SBA-backed securities | 29 |  | — |  |  | 36,309 |  | (3,175) |  |  | 36,338 |  | (3,175) |
Debentures of government- sponsored agencies | — |  | — |  |  | 135,868 |  | (13,261) |  |  | 135,868 |  | (13,261) |
U.S. Treasury securities | — |  | — |  |  | 10,334 |  | (1,580) |  |  | 10,334 |  | (1,580) |
Obligations of state and political subdivisions | 4,799 |  | (54) |  |  | 90,869 |  | (13,106) |  |  | 95,668 |  | (13,160) |
Corporate bonds | — |  | — |  |  | 34,043 |  | (2,948) |  |  | 34,043 |  | (2,948) |
Asset-backed securities | — |  | — |  |  | 1,309 |  | (56) |  |  | 1,309 |  | (56) |
Total available-for-sale | 9,299 |  | (232) |  |  | 749,563 |  | (85,061) |  |  | 758,862 |  | (85,293) |
Total securities at loss position | $ | 144,828 |  | $ | (6,243) |  |  | $ | 1,397,887 |  | $ | (200,303) |  |  | $ | 1,542,715 |  | $ | (206,546) |
December 31, 2022 | < 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: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 62,627 |  | $ | (5,960) |  |  | $ | 218,507 |  | $ | (44,187) |  |  | $ | 281,134 |  | $ | (50,147) |
CMOs issued by FHLMC | 78,144 |  | (5,874) |  |  | 113,796 |  | (23,629) |  |  | 191,940 |  | (29,503) |
CMOs issued by FNMA | 106,485 |  | (5,419) |  |  | — |  | — |  |  | 106,485 |  | (5,419) |
CMOs issued by GNMA | 27,570 |  | (1,676) |  |  | 10,331 |  | (1,400) |  |  | 37,901 |  | (3,076) |
SBA-backed securities | 2,239 |  | (133) |  |  | — |  | — |  |  | 2,239 |  | (133) |
Debentures of government- sponsored agencies | 38,645 |  | (2,530) |  |  | 80,711 |  | (23,937) |  |  | 119,356 |  | (26,467) |
Obligations of state and political subdivisions | 15,155 |  | (589) |  |  | 36,603 |  | (10,152) |  |  | 51,758 |  | (10,741) |
Corporate Bonds | 28,448 |  | (1,552) |  |  | — |  | — |  |  | 28,448 |  | (1,552) |
Total held-to-maturity | 359,313 |  | (23,733) |  |  | 459,948 |  | (103,305) |  |  | 819,261 |  | (127,038) |
Available-for-sale: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | 44,630 |  | (4,501) |  |  | 52,235 |  | (7,632) |  |  | 96,865 |  | (12,133) |
CMOs issued by FHLMC | 169,760 |  | (15,144) |  |  | 143,995 |  | (18,538) |  |  | 313,755 |  | (33,682) |
CMOs issued by FNMA | 4,790 |  | (235) |  |  | 27,529 |  | (3,617) |  |  | 32,319 |  | (3,852) |
CMOs issued by GNMA | 8,214 |  | (374) |  |  | 23,612 |  | (2,922) |  |  | 31,826 |  | (3,296) |
SBA-backed securities | 37,845 |  | (3,228) |  |  | 6,133 |  | (143) |  |  | 43,978 |  | (3,371) |
Debentures of government- sponsored agencies | 19,054 |  | (946) |  |  | 116,052 |  | (13,062) |  |  | 135,106 |  | (14,008) |
U.S. Treasury securities | — |  | — |  |  | 10,269 |  | (1,635) |  |  | 10,269 |  | (1,635) |
Obligations of state and political subdivisions | 70,402 |  | (9,459) |  |  | 28,711 |  | (5,302) |  |  | 99,113 |  | (14,761) |
Corporate Bonds | — |  | — |  |  | 33,276 |  | (3,714) |  |  | 33,276 |  | (3,714) |
Asset-backed securities | — |  | — |  |  | 1,462 |  | (91) |  |  | 1,462 |  | (91) |
Total available-for-sale | 354,695 |  | (33,887) |  |  | 443,274 |  | (56,656) |  |  | 797,969 |  | (90,543) |
Total securities at loss position | $ | 714,008 |  | $ | (57,620) |  |  | $ | 903,222 |  | $ | (159,961) |  |  | $ | 1,617,230 |  | $ | (217,581) |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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