XML 72 R56.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Loans (Schedule of the Credit Exposure of the Loan Portfolio) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | $ 721,587 | $ 686,231
Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 718,439 | 683,190
Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] | 3,148 | 3,041
Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Commercial and Industrial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 277,091 | 236,394
Commercial and Industrial [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 275,308 | 234,271
Commercial and Industrial [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] | 1,783 | 2,123
Commercial and Industrial [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Commercial Mortgage [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 95,605 | 94,675
Real Estate Commercial Mortgage [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 95,447 | 93,788
Real Estate Commercial Mortgage [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] | 158 | 887
Real Estate Commercial Mortgage [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Commercial Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 11,858 | 9,359
Real Estate Commercial Construction [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 11,858 | 9,359
Real Estate Commercial Construction [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Church Related Construction [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Faith based Mortgage [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 316,147 | 316,073
Real Estate Faith based Mortgage [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 314,940 | 316,042
Real Estate Faith based Mortgage [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] | 1,207 | 31
Real Estate Faith based Mortgage [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Faith-based Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 20,576 | 25,948
Real Estate Faith-based Construction [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 20,576 | 25,948
Real Estate Faith-based Construction [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Real Estate Faith-based Construction [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Industrial Revenue Bonds [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  |  | 3,374
Industrial Revenue Bonds [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] |  | 3,374
Industrial Revenue Bonds [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Industrial Revenue Bonds [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans |  | 310 | 408
Other [Member] | Loans Subject To Normal Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [1] | 310 | 408
Other [Member] | Performing Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
Other [Member] | Nonperforming Loans Subject To Special Monitoring [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | [2] |  |
[1] | Loans subject to normal monitoring involve borrowers of acceptable-to-strong credit quality and risk, who have the apparent ability to satisfy their loan obligation.
[2] | Loans subject to special monitoring possess some credit deficiency or potential weakness which requires a high level of management attention.

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

X
- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4531-111522 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesAndLoansReceivableNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | cass_CreditExposureOfLoanPortfolioAxis=cass_LoansSubjectToNormalMonitoringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cass_CreditExposureOfLoanPortfolioAxis=cass_PerformingLoansSubjectToSpecialMonitoringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cass_CreditExposureOfLoanPortfolioAxis=cass_NonperformingLoansSubjectToSpecialMonitoringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cass_RealEstateChurchRelatedConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cass_RealEstateFaithBasedRelatedMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cass_RealEstateFaithBasedConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cass_IndustrialRevenueBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cass_OtherFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |