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v2.4.1.9

Loan Receivable and Allowance for Loan and Lease Losses Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 2us-gaap_FinancingReceivableModificationsNumberOfContracts2 | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 | 3us-gaap_FinancingReceivableModificationsNumberOfContracts2 | 3us-gaap_FinancingReceivableModificationsNumberOfContracts2
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 93us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 | $ 429us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 | $ 966us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 | $ 1,832us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Financing Receivable, Modifications, Post-Modification Recorded Investment | 93us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 428us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 949us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 1,694us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 0us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 873us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 856us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
weighted average rate pre modification | 0.00%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 6.60%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
Weighted average rate post modification | 0.00%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 6.60%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
One- to four family loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts |  | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 2us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 43us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 429us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 43us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 913us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember
Financing Receivable, Modifications, Post-Modification Recorded Investment | 43us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 428us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 43us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 975us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember
weighted average rate pre modification | 12.00%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 6.50%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 12.00%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 7.03%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember
Weighted average rate post modification | 12.00%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 4.50%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 12.00%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember | 5.06%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = carv_OneToFourFamilyLoansMember
Business [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 50us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 0us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 50us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 919us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 50us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | $ 0us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | $ 50us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | $ 719us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember
weighted average rate pre modification | 10.50%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 0.00%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 10.50%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 6.00%carv_WeightedAverageRatePreModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember
Weighted average rate post modification | 10.50%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 0.00%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 10.50%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember | 6.00%carv_WeightedAverageRatePostModification / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialLoanMember

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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