XML 48 R39.htm IDEA: XBRL DOCUMENT
v3.23.2

Securities - Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss (Detail) $ in Thousands | Jun. 30, 2023 USD ($) Investments | Dec. 31, 2022 USD ($) Investments
--- | --- | ---
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 181 | 179
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 423,264 | $ 818,115
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 14,076 | 29,153
Available-for-sale Securities, 12 Months or Longer, Fair Value | 1,126,057 | 698,341
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 79,083 | 64,771
Available-for-sale Securities, Fair Value, Total | 1,549,321 | 1,516,456
Available-for-sale Securities, Unrealized Losses, Total | $ 93,159 | $ 93,924
U.S. Treasuries [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 73 | 74
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 414,002 | $ 787,925
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 13,360 | 27,078
Available-for-sale Securities, 12 Months or Longer, Fair Value | 1,096,064 | 689,939
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 76,167 | 63,621
Available-for-sale Securities, Fair Value, Total | 1,510,066 | 1,477,864
Available-for-sale Securities, Unrealized Losses, Total | $ 89,527 | $ 90,699
U.S. Federal Agencies [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 3 | 1
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 1,305 |
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 2 |
Available-for-sale Securities, 12 Months or Longer, Fair Value |  | $ 349
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses |  | 1
Available-for-sale Securities, Fair Value, Total | 1,305 | 349
Available-for-sale Securities, Unrealized Losses, Total | $ 2 | $ 1
Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 91 | 92
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 1,452 | $ 10,001
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 5 | 1,239
Available-for-sale Securities, 12 Months or Longer, Fair Value | 13,899 | 5,055
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 1,864 | 645
Available-for-sale Securities, Fair Value, Total | 15,351 | 15,056
Available-for-sale Securities, Unrealized Losses, Total | $ 1,869 | $ 1,884
States and Political Subdivisions [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 10 | 8
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 2,029 | $ 2,308
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 22 | 184
Available-for-sale Securities, 12 Months or Longer, Fair Value | 1,251 | 464
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 111 | 37
Available-for-sale Securities, Fair Value, Total | 3,280 | 2,772
Available-for-sale Securities, Unrealized Losses, Total | $ 133 | $ 221
Asset backed Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 1 | 1
Available-for-sale Securities, Less than 12 Months, Fair Value |  | $ 13,010
Available-for-sale Securities, Less than 12 Months, Unrealized Losses |  | 361
Available-for-sale Securities, 12 Months or Longer, Fair Value | $ 12,435 |
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 349 |
Available-for-sale Securities, Fair Value, Total | 12,435 | 13,010
Available-for-sale Securities, Unrealized Losses, Total | $ 349 | $ 361
Other Securities [Member] |  |
Debt Securities, Available-for-Sale [Abstract] |  |
Number of investments | Investments | 3 | 3
Available-for-sale Securities, Less than 12 Months, Fair Value | $ 4,476 | $ 4,871
Available-for-sale Securities, Less than 12 Months, Unrealized Losses | 687 | 291
Available-for-sale Securities, 12 Months or Longer, Fair Value | 2,408 | 2,534
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses | 592 | 467
Available-for-sale Securities, Fair Value, Total | 6,884 | 7,405
Available-for-sale Securities, Unrealized Losses, Total | $ 1,279 | $ 758

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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + 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: |