XML 116 R74.htm IDEA: XBRL DOCUMENT v2.4.1.9

Employee Benefit Plans (Schedule of Long-term Rate of Return on Assets (Details)	12 Months Ended
	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Assumed long-term rate of return on assets	6.75%cass_ExpectedLongTermRateReturn
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	49.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_FixedIncomeFundsMember
One-Year Nominal Return	4.79%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_FixedIncomeFundsMember
Annual Standard Deviation	4.68%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_FixedIncomeFundsMember
U.S. Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	34.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_EquitySecuritiesMember
Large Cap U.S. Growth Equities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapGrowthMember
One-Year Nominal Return	8.42%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapGrowthMember
Annual Standard Deviation	19.20%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapGrowthMember
Large Cap U.S. Value Equities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapValueMember
One-Year Nominal Return	7.53%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapValueMember
Annual Standard Deviation	16.73%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_UnitedStatesLargeCapValueMember
Large Cap U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesLargeCapMember
One-Year Nominal Return	7.67%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesLargeCapMember
Annual Standard Deviation	16.65%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesLargeCapMember
Small Cap U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	8.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesSmallCapMember
One-Year Nominal Return	8.70%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesSmallCapMember
Annual Standard Deviation	20.53%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_EquitySecuritiesSmallCapMember
Non-U.S. Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	16.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesMember
International (Developed) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesDevelopedMember
One-Year Nominal Return	8.98%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesDevelopedMember
Annual Standard Deviation	19.79%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesDevelopedMember
International (Emerging) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesEmergingMember
One-Year Nominal Return	10.77%cass_OneYearNominalReturn / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesEmergingMember
Annual Standard Deviation	28.45%cass_AnnualStandardDeviation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = cass_ForeignEquitySecuritiesEmergingMember

X

- Definition

The expected percentage of annual standard deviation on assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	cass_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of expected long term rate return during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cass_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The expected percentage of one-year nominal return on assets.

+ References

No definition available.

+ Details

Name:	cass_OneYearNominalReturn
Namespace Prefix:	cass_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

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X

- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

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- Details

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