XML 40 R75.htm IDEA: XBRL DOCUMENT v2.4.1.9
Benefit Plans (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2007
Defined Benefit Plan Disclosure [Line Items]      
Expected Actuarial Loss $ 91cmsb_ExpectedActuarialLoss    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Description 0    
Employee Stock Ownership Plan (ESOP), Debt Structure, Direct Loan, Description     The ESOP used the proceeds of a $1.6 million, 8.0% term loan from the Company to purchase 164,413 shares of Company common stock. The term loan from the Company to the ESOP is payable in annual installments of principal and interest over 30 years commencing on December 31, 2007. The Company intends to make discretionary contributions to the ESOP which will be equal to principal and interest payments on the term loan to the ESOP from the Company.
Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP     164,413us-gaap_EmployeeStockOwnershipPlanESOPSharesContributedToESOP
Employee Stock Ownership Plan (ESOP), Debt Structure, Direct Loan, Amount 1,487us-gaap_EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanAmount 1,509us-gaap_EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanAmount  
ESOP expense 50us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense 48us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense  
Savings Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= cmsb_SavingsPlanMember
   
Deferred Compensation Arrangement with Individual, Compensation Expense $ 72us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= cmsb_SavingsPlanMember
$ 83us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= cmsb_SavingsPlanMember
 
Maximum [Member] | Savings Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 8.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= cmsb_SavingsPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember