XML 77 R59.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Loans - Schedule of the Aging of Loans by Loan Categories (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans | $ 1,081,989 | $ 1,014,318
Non- accrual | 0 | 0
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 559,262 | 498,502
Non- accrual | 0 | 0
Real Estate, Commercial, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 119,194 | 118,371
Non- accrual | 0 | 0
Real Estate, Commercial, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 9,134 | 8,233
Non- accrual | 0 | 0
Real Estate, Faith-Based, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 368,881 | 381,368
Non- accrual | 0 | 0
Real Estate, Faith-based, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 25,518 | 7,790
Non- accrual | 0 | 0
Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | 54
Non- accrual |  | 0
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,081,989 | 1,014,318
Current | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 559,262 | 498,502
Current | Real Estate, Commercial, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 119,194 | 118,371
Current | Real Estate, Commercial, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 9,134 | 8,233
Current | Real Estate, Faith-Based, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 368,881 | 381,368
Current | Real Estate, Faith-based, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 25,518 | 7,790
Current | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | 54
30-59 Days |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Real Estate, Commercial, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Real Estate, Commercial, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Real Estate, Faith-Based, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Real Estate, Faith-based, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
30-59 Days | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | 0
60-89 Days |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Real Estate, Commercial, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Real Estate, Commercial, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Real Estate, Faith-Based, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Real Estate, Faith-based, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
60-89 Days | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | 0
90 Days and Over |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
90 Days and Over | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
90 Days and Over | Real Estate, Commercial, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
90 Days and Over | Real Estate, Commercial, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
90 Days and Over | Real Estate, Faith-Based, Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
90 Days and Over | Real Estate, Faith-based, Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | $ 0 | 0
90 Days and Over | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | $ 0

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_CommercialAndIndustrialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_RealEstateCommercialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_RealEstateCommercialConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_RealEstateFaithbasedMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_RealEstateFaithbasedConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cass_OtherLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |