XML 25 R45.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

TDRs (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2019 | Dec. 31, 2018 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts |  | 0 |
Business |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | 2 |  | 3
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 1,014 |  | $ 2,776
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 648 |  | $ 2,360
weighted average rate pre modification | 6.11% |  | 6.51%
Weighted average rate post modification | 6.24% |  | 6.06%

X
- Definition Weighted average rate post modification on TDR loans + References No definition available. + Details
Name: | carv_WeightedAverageRatePostModification
Namespace Prefix: | carv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition weighted average rate pre modification rates on TDR loans + References No definition available. + Details
Name: | carv_WeightedAverageRatePreModification
Namespace Prefix: | carv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |