XML 69 R38.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Loans by Type (Schedule of Recorded Investment and Unpaid Principal for Impaired Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | $ 3,176 | $ 488
Recorded Investment [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 3,176 | 488
Upaid Principal Balance [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 3,176 | 488
Related Allowance for Loan Losses [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | $ 1,241 | $ 127
Commercial and Industrial [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual |  |
Commercial and Industrial [Member] | Recorded Investment [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual |  |
Commercial and Industrial [Member] | Upaid Principal Balance [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual |  |
Commercial and Industrial [Member] | Related Allowance for Loan Losses [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual |  |
Real Estate Commercial Mortgage [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | $ 3,062 | $ 361
Real Estate Commercial Mortgage [Member] | Recorded Investment [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 3,062 | 361
Real Estate Commercial Mortgage [Member] | Upaid Principal Balance [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 3,062 | $ 361
Real Estate Commercial Mortgage [Member] | Related Allowance for Loan Losses [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 1,127 |
Real Estate Church Related Mortgage [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 114 | $ 127
Real Estate Church Related Mortgage [Member] | Recorded Investment [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 114 | 127
Real Estate Church Related Mortgage [Member] | Upaid Principal Balance [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | 114 | 127
Real Estate Church Related Mortgage [Member] | Related Allowance for Loan Losses [Member] |  |
Participating Mortgage Loans [Line Items] |  |
Nonaccrual | $ 114 | $ 127

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
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 No definition available. + Details
Name: | us-gaap_ParticipatingMortgageLoansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=cass_RecordedInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=cass_UpaidPrincipalBalanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_AllowanceForLoanAndLeaseLossesMember
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_RealEstateChurchRelatedMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |