XML 17 R54.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loans (Schedule of the Credit Exposure of the Loan Portfolio) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Participating Mortgage Loans [Line Items]    
Loans $ 669,346us-gaap_NotesAndLoansReceivableNetCurrent $ 652,177us-gaap_NotesAndLoansReceivableNetCurrent
Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 649,508us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember		 [1] 636,373us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember		 [1]
Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 19,350us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember		 [2] 14,007us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember		 [2]
Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 488us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember		 [2] 1,797us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember		 [2]
Commercial and Industrial [Member]    
Participating Mortgage Loans [Line Items]    
Loans 203,350us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 171,304us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember
Commercial and Industrial [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 199,837us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 [1] 167,878us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 [1]
Commercial and Industrial [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 3,513us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 [2] 3,415us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 [2]
Commercial and Industrial [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2] 11us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_CommercialAndIndustrialLoanMember		 [2]
Real Estate Commercial Mortgage [Member]    
Participating Mortgage Loans [Line Items]    
Loans 117,754us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 128,358us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember
Real Estate Commercial Mortgage [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 103,097us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [1] 119,521us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [1]
Real Estate Commercial Mortgage [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 14,296us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [2] 8,358us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [2]
Real Estate Commercial Mortgage [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 361us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [2] 479us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialMortgageMember		 [2]
Real Estate Commercial Construction [Member]    
Participating Mortgage Loans [Line Items]    
Loans    6,632us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialConstructionLoanMember
Real Estate Commercial Construction [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [1] 6,632us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateCommercialConstructionLoanMember		 [1]
Real Estate Commercial Construction [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Real Estate Commercial Construction [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Real Estate Church Related Mortgage [Member]    
Participating Mortgage Loans [Line Items]    
Loans 305,887us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 326,832us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember
Real Estate Church Related Mortgage [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 304,219us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [1] 323,291us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [1]
Real Estate Church Related Mortgage [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 1,541us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [2] 2,234us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_PerformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [2]
Real Estate Church Related Mortgage [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 127us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [2] 1,307us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_NonperformingLoansSubjectToSpecialMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedMortgageMember		 [2]
Real Estate Church Related Construction [Member]    
Participating Mortgage Loans [Line Items]    
Loans 18,612us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedConstructionLoanMember		 9,817us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedConstructionLoanMember
Real Estate Church Related Construction [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 18,612us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedConstructionLoanMember		 [1] 9,817us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_RealEstateChurchRelatedConstructionLoanMember		 [1]
Real Estate Church Related Construction [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Real Estate Church Related Construction [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Industrial Revenue Bond [Member]    
Participating Mortgage Loans [Line Items]    
Loans 23,348us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_IndustrialRevenueBondMember		 9,167us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_IndustrialRevenueBondMember
Industrial Revenue Bond [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 23,348us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_IndustrialRevenueBondMember		 [1] 9,167us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_IndustrialRevenueBondMember		 [1]
Industrial Revenue Bond [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Industrial Revenue Bond [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Other [Member]    
Participating Mortgage Loans [Line Items]    
Loans 395us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_OtherFinancingReceivableMember		 67us-gaap_NotesAndLoansReceivableNetCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_OtherFinancingReceivableMember
Other [Member] | Loans Subject To Normal Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans 395us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_OtherFinancingReceivableMember		 [1] 67us-gaap_NotesAndLoansReceivableNetCurrent
/ cass_CreditExposureOfLoanPortfolioAxis
= cass_LoansSubjectToNormalMonitoringMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cass_OtherFinancingReceivableMember		 [1]
Other [Member] | Performing Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [2]
Other [Member] | Nonperforming Loans Subject To Special Monitoring [Member]    
Participating Mortgage Loans [Line Items]    
Loans    [2]    [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.