XML 47 R18.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Subsequent Events | 6 Months Ended
--- | ---
Sep. 30, 2012
SUBSEQUENTS EVENTS [Abstract] |
Subsequent Event, Pro Forma Business Combinations [Text Block] | SUBSEQUENTS EVENTS In accordance with ASC Topic 855, the Company has evaluated whether any subsequent events that require recognition or disclosure in the accompanying financial statements and notes thereto have taken place through the date these financial statements were issued. On October 29 and 30, 2012, the Company's market area experienced unprecedented damage due to Hurricane Sandy. Although the extent of the damage and its impact on the Company cannot be determined at this time, the storm is expected to impair the ability of some borrowers to repay their loans and also adversely impact collateral values. As a result, the Company may experience increased levels of non-performing loans and loan losses which may negatively impact earnings.

X
- Details
Name: | carv_SubsequentsEventsAbstract
Namespace Prefix: | carv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for pro forma information for significant acquisitions or disposals that occurred or are probable to occur after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 01 -Paragraph a -Subparagraph 2, 4 -Article 11 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Topic 855 -SubTopic 10 -Section 50 -Paragraph 3 -Name Accounting Standards Codification -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662 + Details
Name: | us-gaap_SubsequentEventProFormaBusinessCombinations
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration