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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Sep. 30, 2014
COMMITMENTS AND CONTINGENCIES [Abstract]    
Unfunded loan commitments $ 95.3us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability $ 96.0us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability
Commitment to purchase securities 0us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted 0us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Inter National Bank [Member]    
Loss Contingencies [Line Items]    
Amount of shortfall in depository account 10.5cash_AmountOfShortfallInDepositoryAccount
/ us-gaap_LitigationCaseAxis
= cash_InterNationalBankMember
 
Springbok Services Inc. [Member]    
Loss Contingencies [Line Items]    
Estimate of possible loss 1.5us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationCaseAxis
= cash_SpringbokServicesIncMember
 
Range of reasonably possible loss, minimum 0us-gaap_LossContingencyRangeOfPossibleLossMinimum
/ us-gaap_LitigationCaseAxis
= cash_SpringbokServicesIncMember
 
Range of reasonably possible loss, maximum $ 0.3us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LitigationCaseAxis
= cash_SpringbokServicesIncMember