XML 43 R37.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Securities - Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss (Detail) $ in Thousands | Mar. 31, 2024 USD ($) Investments | Dec. 31, 2023 USD ($) Investments
--- | --- | ---
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 154 | 155
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 93,367 | $ 6,324
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 829 | 97
Available-for-sale Securities, 12 Months or Longer, Fair Value | 1,403,088 | 1,436,062
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 67,853 | 66,004
Available-for-sale Securities, Fair Value, Total | 1,496,455 | 1,442,386
Available-for-sale Securities, Unrealized Losses, Total | $ 68,682 | $ 66,101
U.S. Treasuries [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 67 | 68
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 90,252 | $ 4,838
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 816 | 90
Available-for-sale Securities, 12 Months or Longer, Fair Value | 1,370,129 | 1,401,669
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 64,391 | 62,545
Available-for-sale Securities, Fair Value, Total | 1,460,381 | 1,406,507
Available-for-sale Securities, Unrealized Losses, Total | $ 65,207 | $ 62,635
U.S. Federal Agencies [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 3 | 3
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 1,057 | $ 1,100
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 4 | 3
Available-for-sale Securities, Fair Value, Total | 1,057 | 1,100
Available-for-sale Securities, Unrealized Losses, Total | $ 4 | $ 3
Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 71 | 74
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 1,191 | $ 80
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 6 |
Available-for-sale Securities, 12 Months or Longer, Fair Value | 12,767 | 13,261
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 1,789 | 1,677
Available-for-sale Securities, Fair Value, Total | 13,958 | 13,341
Available-for-sale Securities, Unrealized Losses, Total | $ 1,795 | $ 1,677
States and Political Subdivisions [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 9 | 6
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 867 | $ 306
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 3 | 4
Available-for-sale Securities, 12 Months or Longer, Fair Value | 2,128 | 1,847
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 134 | 110
Available-for-sale Securities, Fair Value, Total | 2,995 | 2,153
Available-for-sale Securities, Unrealized Losses, Total | $ 137 | $ 114
Asset backed Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 1 | 1
Available-for-sale Securities, 12 Months or Longer, Fair Value | $ 11,252 | $ 12,512
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 188 | 282
Available-for-sale Securities, Fair Value, Total | 11,252 | 12,512
Available-for-sale Securities, Unrealized Losses, Total | $ 188 | $ 282
Other Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 3 | 3
Available-for-sale Securities, 12 Months or Longer, Fair Value | $ 6,812 | $ 6,773
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 1,351 | 1,390
Available-for-sale Securities, Fair Value, Total | 6,812 | 6,773
Available-for-sale Securities, Unrealized Losses, Total | $ 1,351 | $ 1,390

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

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |