XML 104 R89.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments and Contingencies Repurchase request (Details) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2016 USD ($)
Repurchase request [Abstract] |  |
Principal payments received on open claims | $ 36 |
Open claims, beginning balance | 2,045 | [1]
Gross new demands received | 0 |
Loan repurchased/made whole | 0 |
Demands rescinded | 0 |
Open claims, ending balance | $ 2,009 | [1]
[1] | (1) The open claims include all open requests received by the Bank where either FNMA has requested loan files for review, where FNMA has not formally rescinded the repurchase request or where the Bank has not agreed to repurchase the loan. The amounts reflected in this table are the unpaid principal balance and do not incorporate any losses the Bank would incur upon the repurchase of these loans.

X
- Definition Demands rescinded + References No definition available. + Details
Name: | carv_DemandsRescinded
Namespace Prefix: | carv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gross new demands received + References No definition available. + Details
Name: | carv_GrossNewDemandsReceived
Namespace Prefix: | carv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Loan repurchased/made whole + References No definition available. + Details
Name: | carv_LoanRepurchasedmadeWhole
Namespace Prefix: | carv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Open claims, begining balance + References No definition available. + Details
Name: | carv_OpenClaimsBeginingBalance
Namespace Prefix: | carv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Principal payments received on open claims + References No definition available. + Details
Name: | carv_Principalpaymentsreceivedonopenclaims
Namespace Prefix: | carv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Repurchase request [Abstract] + References No definition available. + Details
Name: | carv_RepurchaseRequestAbstract
Namespace Prefix: | carv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration