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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Schedule of Held-to-maturity Securities | A summary of the amortized cost, fair value and allowance for credit losses related to securities held-to-maturity as of December 31, 2020 and December 31, 2019 is presented below.
Held-to-maturity: | Amortized Cost 1 | Allowance for Credit Losses | Net Carrying Amount | Gross Unrealized | Fair Value
(in thousands) | Gains | (Losses)
December 31, 2020 |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |
MBS pass-through securities issued by FHLMC and FNMA | $ | 65,579 |  | $ | — |  | $ | 65,579 |  | $ | 3,924 |  | $ | — |  | $ | 69,503 |
CMOs issued by FHLMC | 27,201 |  | — |  | 27,201 |  | 1,441 |  | — |  | 28,642 |
CMOs issued by FNMA | 8,042 |  | — |  | 8,042 |  | 363 |  | — |  | 8,405 |
SBA-backed securities | 6,547 |  | — |  | 6,547 |  | 400 |  | — |  | 6,947 |
Obligations of state and political subdivisions | 1,667 |  | — |  | 1,667 |  | 21 |  |  | 1,688 |
Total held-to-maturity | $ | 109,036 |  | $ | — |  | $ | 109,036 |  | $ | 6,149 |  | $ | — |  | $ | 115,185 |
December 31, 2019 |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |
MBS pass-through securities issued by FHLMC and FNMA | 80,451 |  | — |  | 80,451 |  | 1,018 |  | (144) |  | 81,325 |
CMOs issued by FHLMC | 31,477 |  | — |  | 31,477 |  | 685 |  | (5) |  | 32,157 |
CMOs issued by FNMA | 10,210 |  | — |  | 10,210 |  | 282 |  | — |  | 10,492 |
CMOs issued by GNMA | 3,763 |  | — |  | 3,763 |  | 53 |  | — |  | 3,816 |
SBA-backed securities | 7,999 |  | — |  | 7,999 |  | 265 |  | — |  | 8,264 |
Obligations of state and political subdivisions | 3,513 |  | — |  | 3,513 |  | 75 |  | — |  | 3,588 |
Total held-to-maturity | $ | 137,413 |  | $ | — |  | $ | 137,413 |  | $ | 2,378 |  | $ | (149) |  | $ | 139,642 |
1 Amortized cost and fair values exclude accrued interest receivable of $366 thousand and $469 thousand at December 31, 2020 and 2019, 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 Moody's and/or Standard & Poor's bond ratings for our portfolio of held-to-maturity securities issued by states and political subdivisions as of December 31, 2020.
(in thousands) | Obligations of state and political subdivisions |  |  |  |
AA | $ | 1,461 |  |  |  |  |
A | 206 |  |  |  |  |
Total | $ | 1,667 |  |  |  |  |
Schedule of Available-for-sale Securities | A summary of the amortized cost, fair value and allowance for credit losses related to securities available-for-sale as of December 31, 2020 and December 31, 2019 is presented below.
Available-for-sale: | Amortized Cost 1 | Gross Unrealized | Allowance for Credit Losses | Fair Value
(in thousands) | Gains | (Losses)
December 31, 2020 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
MBS pass-through securities issued by FHLMC and FNMA | $ | 50,686 |  | $ | 2,530 |  | $ | — |  | $ | — |  | $ | 53,216 |
CMOs issued by FHLMC | 143,267 |  | 7,925 |  | (1) |  | — |  | 151,191 |
CMOs issued by FNMA | 16,450 |  | 580 |  | — |  | — |  | 17,030 |
CMOs issued by GNMA | 6,863 |  | 351 |  | — |  | — |  | 7,214 |
SBA-backed securities | 30,941 |  | 1,976 |  | (55) |  | — |  | 32,862 |
Debentures of government- sponsored agencies | 19,944 |  | 266 |  | (24) |  | — |  | 20,186 |
Obligations of state and political subdivisions | 104,887 |  | 5,765 |  | — |  | — |  | 110,652 |
Total available-for-sale | $ | 373,038 |  | $ | 19,393 |  | $ | (80) |  | $ | — |  | $ | 392,351 |
December 31, 2019 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
MBS pass-through securities issued by FHLMC and FNMA | $ | 98,502 |  | $ | 1,617 |  | $ | (48) |  | $ | — |  | $ | 100,071 |
CMOs issued by FHLMC | 139,398 |  | 3,892 |  | (64) |  | — |  | 143,226 |
CMOs issued by FNMA | 22,702 |  | 390 |  | — |  | — |  | 23,092 |
CMOs issued by GNMA | 11,719 |  | 42 |  | (6) |  | — |  | 11,755 |
SBA-backed securities | 35,674 |  | 688 |  | (76) |  | — |  | 36,286 |
Debentures of government- sponsored agencies | 48,389 |  | 727 |  | (70) |  | — |  | 49,046 |
Obligations of state and political subdivisions | 66,042 |  | 1,386 |  | (146) |  | — |  | 67,282 |
Corporate bonds | 1,497 |  | 6 |  | (1) |  | — |  | 1,502 |
Total available-for-sale | $ | 423,923 |  | $ | 8,748 |  | $ | (411) |  | $ | — |  | $ | 432,260 |
1 Amortized cost and fair value exclude accrued interest receivable of $1.9 million and $1.8 million at December 31, 2020 and 2019, respectively, which is included in interest receivable and other assets in the consolidated statements of condition.
Investments Classified by Contractual Maturity Date | The amortized cost and fair value of investment debt securities by contractual maturity at December 31, 2020 and 2019 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.
| December 31, 2020 | December 31, 2019
| 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 | $ | 246 |  | $ | 250 |  | $ | 11,530 |  | $ | 11,687 |  | $ | 1,807 |  | $ | 1,811 |  | $ | 6,699 |  | $ | 6,706 |
After one but within five years | 7,550 |  | 7,961 |  | 59,028 |  | 62,397 |  | 2,256 |  | 2,296 |  | 48,706 |  | 49,619 |
After five years through ten years | 52,113 |  | 55,872 |  | 144,908 |  | 154,089 |  | 56,221 |  | 57,544 |  | 208,806 |  | 214,277 |
After ten years | 49,127 |  | 51,102 |  | 157,572 |  | 164,178 |  | 77,129 |  | 77,991 |  | 159,712 |  | 161,658 |
Total | $ | 109,036 |  | $ | 115,185 |  | $ | 373,038 |  | $ | 392,351 |  | $ | 137,413 |  | $ | 139,642 |  | $ | 423,923 |  | $ | 432,260 |
Gain (Loss) on Investments | Sales of investment securities and gross gains and losses are shown in the following table.
(in thousands) | 2020 | 2019 | 2018
Available-for-sale: |  |  |
Sales proceeds | $ | 33,756 |  | $ | 66,081 |  | $ | 16,972 |
Gross realized gains | $ | 916 |  | $ | 214 |  | $ | 27 |
Gross realized losses | $ | (1) |  | $ | (159) |  | $ | (106) |
Schedule of Financial Instruments Owned and Pledged as Collateral | Pledged investment securities are shown in the following table.
(in thousands) | December 31, 2020 | December 31, 2019
Pledged to the State of California: |  |
Secure public deposits in compliance with the Local Agency Security Program | $ | 131,051 |  | $ | 126,598 |
Collateral for trust deposits | 751 |  | 742 |
Total investment securities pledged to the State of California | $ | 131,802 |  | $ | 127,340 |
Collateral for Wealth Management and Trust Services ("WMTS") checking account | $ | 629 |  | $ | 622 |
Total pledged investment securities | $ | 132,431 |  | $ | 127,962 |
Schedule of Unrealized Loss on Investments | Those securities are summarized and classified according to the duration of the loss period in the tables below.
December 31, 2020 | < 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
Available-for-sale: |  |  |  |  |  |  |  |
SBA-backed securities | $ | — |  | $ | — |  |  | $ | 1,790 |  | $ | (55) |  |  | $ | 1,790 |  | $ | (55) |
CMOs issued by FHLMC | 5,975 |  | (1) |  |  | — |  | — |  |  | 5,975 |  | (1) |
Debentures of government-sponsored agencies | 3,943 |  | (24) |  |  | — |  | — |  |  | 3,943 |  | (24) |
Total | $ | 9,918 |  | $ | (25) |  |  | $ | 1,790 |  | $ | (55) |  |  | $ | 11,708 |  | $ | (80) |
December 31, 2019 | < 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 and FNMA | $ | 14,203 |  | $ | (60) |  |  | $ | 6,073 |  | $ | (84) |  |  | $ | 20,276 |  | $ | (144) |
CMOs issued by FHLMC | — |  | — |  |  | 1,725 |  | (5) |  |  | 1,725 |  | (5) |
Total held-to-maturity | 14,203 |  | (60) |  |  | 7,798 |  | (89) |  |  | 22,001 |  | (149) |
Available-for-sale: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC and FNMA | 4,367 |  | (34) |  |  | 4,464 |  | (14) |  |  | 8,831 |  | (48) |
SBA-backed securities | 9,227 |  | (14) |  |  | 2,448 |  | (62) |  |  | 11,675 |  | (76) |
CMOs issued by FHLMC | 14,918 |  | (58) |  |  | 2,981 |  | (6) |  |  | 17,899 |  | (64) |
CMOs issued by GNMA | 7,139 |  | (6) |  |  | — |  | — |  |  | 7,139 |  | (6) |
Debentures of government- sponsored agencies | 25,228 |  | (70) |  |  | — |  | — |  |  | 25,228 |  | (70) |
Obligations of state and political subdivisions | 20,579 |  | (145) |  |  | 659 |  | (1) |  |  | 21,238 |  | (146) |
Corporate bonds | 500 |  | (1) |  |  | — |  | — |  |  | 500 |  | (1) |
Total available-for-sale | 81,958 |  | (328) |  |  | 10,552 |  | (83) |  |  | 92,510 |  | (411) |
Total | $ | 96,161 |  | $ | (388) |  |  | $ | 18,350 |  | $ | (172) |  |  | $ | 114,511 |  | $ | (560) |

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