XML 42 R29.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Investment Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule 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 December 31, 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)
December 31, 2023 |  |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 306,261 |  | $ | — |  | $ | 306,261 |  | $ | — |  | $ | (44,396) |  | $ | 261,865 |
CMOs issued by FHLMC | 226,416 |  | — |  | 226,416 |  | 28 |  | (24,869) |  | 201,575 |
CMOs issued by FNMA | 101,502 |  | — |  | 101,502 |  | — |  | (4,779) |  | 96,723 |
CMOs issued by GNMA | 51,006 |  | — |  | 51,006 |  | — |  | (5,235) |  | 45,771 |
SBA-backed securities | 1,853 |  | — |  | 1,853 |  | — |  | (90) |  | 1,763 |
Debentures of government-sponsored agencies | 146,126 |  | — |  | 146,126 |  | — |  | (21,994) |  | 124,132 |
Obligations of state and political subdivisions | 62,034 |  | — |  | 62,034 |  | 47 |  | (7,884) |  | 54,197 |
Corporate bonds | 30,000 |  | — |  | 30,000 |  | — |  | (1,196) |  | 28,804 |
Total held-to-maturity | $ | 925,198 |  | $ | — |  | $ | 925,198 |  | $ | 75 |  | $ | (110,443) |  | $ | 814,830 |
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 December 31, 2023 and 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 December 31, 2023 and 2022.
| Obligations of state and political subdivisions | Corporate bonds
(in thousands) | December 31, 2023 | December 31, 2022 | December 31, 2023 | December 31, 2022
Aaa / AAA | $ | 42,577 |  | $ | 42,986 |  | $ | — |  | $ | — |
Aa2 / AA | 19,457 |  | 19,514 |  | — |  | — |
A2 / A | — |  | — |  | 30,000 |  | 30,000 |
Total | $ | 62,034 |  | $ | 62,500 |  | $ | 30,000 |  | $ | 30,000 |
Schedule 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 December 31, 2023 and 2022 is presented below.
Available-for-sale: | Amortized Cost 1 | Gross Unrealized | Allowance for Credit Losses | Fair Value
(in thousands) | Gains | (Losses)
December 31, 2023 |  |  |  |  |
Securities of U.S. government-sponsored enterprises: |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | 81,937 |  | $ | 2 |  | $ | (9,516) |  | $ | — |  | $ | 72,423 |
CMOs issued by FHLMC | 266,407 |  | — |  | (24,758) |  | — |  | 241,649 |
CMOs issued by FNMA | 23,987 |  | — |  | (2,715) |  | — |  | 21,272 |
CMOs issued by GNMA | 20,006 |  | — |  | (2,878) |  | — |  | 17,128 |
SBA-backed securities | 21,126 |  | — |  | (1,655) |  | — |  | 19,471 |
Debentures of government- sponsored agencies | 73,899 |  | — |  | (7,037) |  | — |  | 66,862 |
U.S. Treasury securities | 11,923 |  | — |  | (1,300) |  | — |  | 10,623 |
Obligations of state and political subdivisions | 102,202 |  | 1 |  | (10,321) |  | — |  | 91,882 |
Corporate bonds | 11,992 |  | — |  | (1,274) |  | — |  | 10,718 |
Asset-backed securities | — |  | — |  | — |  | — |  | — |
Total available-for-sale | $ | 613,479 |  | $ | 3 |  | $ | (61,454) |  | $ | — |  | $ | 552,028 |
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 $2.3 million and $3.2 million at December 31, 2023 and 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 and fair value of investment debt securities by contractual maturity at December 31, 2023 and 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.
| December 31, 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 | $ | — |  | $ | — |  | $ | 101 |  | $ | 100 |  | $ | 450 |  | $ | 446 |  | $ | 1,254 |  | $ | 1,239 |
After one but within five years | 87,887 |  | 84,541 |  | 226,669 |  | 208,444 |  | 87,418 |  | 83,663 |  | 335,813 |  | 307,843 |
After five years through ten years | 304,976 |  | 261,654 |  | 95,552 |  | 85,447 |  | 262,072 |  | 222,280 |  | 185,997 |  | 166,273 |
After ten years | 532,335 |  | 468,635 |  | 291,157 |  | 258,037 |  | 622,267 |  | 538,850 |  | 369,541 |  | 326,741 |
Total | $ | 925,198 |  | $ | 814,830 |  | $ | 613,479 |  | $ | 552,028 |  | $ | 972,207 |  | $ | 845,239 |  | $ | 892,605 |  | $ | 802,096 |
Schedule of Sale of Investment Securities and Gross Gains and Losses | Sales of investment securities and gross gains and losses for the years ended December 31, 2023, 2022 and 2021 are shown in the following table.
(in thousands) | 2023 | 2022 | 2021
Available-for-sale: |  |  |
Sales proceeds | $ | 205,795 |  | $ | 10,664 |  | $ | 6,632 |
Gross realized gains | $ | 5 |  | $ | 17 |  | $ | 1 |
Gross realized losses | $ | (8,705) |  | $ | (80) |  | $ | (17) |
Sale of equity securities: 1 |  |  |
Sales proceeds | $ | 2,807 |  | $ | — |  | $ | — |
Gross realized gain | $ | 2,807 |  | $ | — |  | $ | — |
1 Refer to VISA Inc. Class B Common Stock section below for more information.
Schedule of Financial Instruments Owned and Pledged as Collateral | The reported values of pledged investment securities are shown in the following table.
(in thousands) | December 31, 2023 | December 31, 2022
Pledged to the State of California: |  |
Secure public deposits in compliance with the Local Agency Security Program | $ | 287,436 |  | $ | 231,307 |
Collateral for trust deposits | 666 |  | 669 |
Collateral for Wealth Management and Trust Services checking account | 562 |  | 564 |
Total investment securities pledged to the State of California | 288,664 |  | 232,540 |
Bankruptcy trustee deposits pledged with Federal Reserve Bank | 1,151 |  | 1,686 |
Pledged to FHLB Securities-Backed Credit Program | 383,484 |  | — |
Pledged to the Federal Reserve "BTFP" | 265,660 |  | — |
Total pledged investment securities | $ | 938,959 |  | $ | 234,226 |
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, 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 | $ | — |  | $ | — |  |  | $ | 261,865 |  | $ | (44,396) |  |  | $ | 261,865 |  | $ | (44,396) |
CMOs issued by FHLMC | 8,662 |  | (21) |  |  | 188,657 |  | (24,848) |  |  | 197,319 |  | (24,869) |
CMOs issued by FNMA | 42,474 |  | (411) |  |  | 54,249 |  | (4,368) |  |  | 96,723 |  | (4,779) |
CMOs issued by GNMA | 10,988 |  | (244) |  |  | 34,783 |  | (4,991) |  |  | 45,771 |  | (5,235) |
SBA-backed securities | — |  | — |  |  | 1,763 |  | (90) |  |  | 1,763 |  | (90) |
Debentures of government-sponsored agencies | — |  | — |  |  | 124,132 |  | (21,994) |  |  | 124,132 |  | (21,994) |
Obligations of state and political subdivisions | — |  | — |  |  | 44,437 |  | (7,884) |  |  | 44,437 |  | (7,884) |
Corporate bonds | — |  | — |  |  | 28,804 |  | (1,196) |  |  | 28,804 |  | (1,196) |
Total held-to-maturity | $ | 62,124 |  | $ | (676) |  |  | $ | 738,690 |  | $ | (109,767) |  |  | $ | 800,814 |  | $ | (110,443) |
Available-for-sale: |  |  |  |  |  |  |  |
MBS pass-through securities issued by FHLMC, FNMA and GNMA | $ | — |  | $ | — |  |  | $ | 72,146 |  | $ | (9,516) |  |  | $ | 72,146 |  | $ | (9,516) |
CMOs issued by FHLMC | 1,235 |  | (7) |  |  | 240,414 |  | (24,751) |  |  | 241,649 |  | (24,758) |
CMOs issued by FNMA | — |  | — |  |  | 21,272 |  | (2,715) |  |  | 21,272 |  | (2,715) |
CMOs issued by GNMA | — |  | — |  |  | 17,128 |  | (2,878) |  |  | 17,128 |  | (2,878) |
SBA-backed securities | — |  | — |  |  | 19,471 |  | (1,655) |  |  | 19,471 |  | (1,655) |
Debentures of government-sponsored agencies | — |  | — |  |  | 66,862 |  | (7,037) |  |  | 66,862 |  | (7,037) |
U.S. Treasury securities | — |  | — |  |  | 10,623 |  | (1,300) |  |  | 10,623 |  | (1,300) |
Obligations of state and political subdivisions | 666 |  | (1) |  |  | 90,655 |  | (10,320) |  |  | 91,321 |  | (10,321) |
Corporate bonds | — |  | — |  |  | 10,718 |  | (1,274) |  |  | 10,718 |  | (1,274) |
Asset-backed securities | — |  | — |  |  | — |  | — |  |  | — |  | — |
Total available-for-sale | $ | 1,901 |  | $ | (8) |  |  | $ | 549,289 |  | $ | (61,446) |  |  | $ | 551,190 |  | $ | (61,454) |
Total securities at a loss position | $ | 64,025 |  | $ | (684) |  |  | $ | 1,287,979 |  | $ | (171,213) |  |  | $ | 1,352,004 |  | $ | (171,897) |
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 GNMA | 4,790 |  | (235) |  |  | 27,529 |  | (3,617) |  |  | 32,319 |  | (3,852) |
CMOs issued by FNMA | 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 | $ | 714,008 |  | $ | (57,620) |  |  | $ | 903,222 |  | $ | (159,961) |  |  | $ | 1,617,230 |  | $ | (217,581) |

X
- Definition Debt Securities, Available-For-Sale And Held-To-Maturity, Continuous Unrealized Loss Position, Fair Value + References No definition available. + Details
Name: | bmrc_DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | bmrc_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of credit quality indicator for investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityCreditQualityIndicatorTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5A Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5A Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5A Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B Reference 16: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B Reference 18: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
Name: | us-gaap_RealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration