XML 163 R39.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stockholders' Equity (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2013
Capital amounts and ratios [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] | The table below presents the capital position of the Bank at March 31, 2013.
|  |  | Tier 1 |  | Tier 1 |  | Total
($ in thousands) |  |  | Leverage Capital Ratio |  | Risk-Based Capital Ratio |  | Risk-Based Capital Ratio
GAAP Capital at March 31, 2013 |  |  | $ | 66,116 |  |  | $ | 66,116 |  |  | $ | 66,116 |
Add: |  |  |  |  |  |  |
General valuation allowances |  |  | — |  |  | — |  |  | 4,900 |
Qualifying subordinated debt |  |  | — |  |  | — |  |  | 5,000 |
Other |  |  | 474 |  |  | 474 |  |  | 474 |
Deduct: |  |  |  |  |  |  |
Unrealized gains on securities available-for-sale, net |  |  | 1,064 |  |  | 1,064 |  |  | 1,064 |
Regulatory Capital |  |  | $ | 65,526 |  |  | $ | 65,526 |  |  | $ | 75,426 |
Minimum Capital requirement |  |  | 57,501 |  |  | 50,152 |  |  | 50,152 |
Regulatory Capital Excess |  |  | $ | 8,025 |  |  | $ | 15,374 |  |  | $ | 25,274 |
Capital Ratios |  |  | 10.26 | % |  | 16.99 | % |  | 19.55 | %

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

X
- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958577-112826 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 18 -IssueDate 2006-05-01 -Chapter 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration