XML 200 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Deposits CD Maturities (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2013
CD maturities [Abstract] |
CD maturity [Table Text Block] | Scheduled maturities of certificates of deposit are as follows for the year ended March 31, 2013:
$ in thousands |  | Period to Maturity
Rate |  | < 1 Yr. |  | 1-2 Yrs. |  | 2-3 Yrs. |  | 3+ Yrs. |  | Total 2013 |  | Percent of Total
0% - 0.99% |  | $ | 91,938 |  |  | $ | 5,539 |  |  | $ | 2,280 |  |  | $ | 4,064 |  |  | $ | 103,821 |  |  | 52.41 | %
1% - 1.99% |  | 14,246 |  |  | 34,361 |  |  | 3,589 |  |  | 15,144 |  |  | 67,340 |  |  | 33.99 | %
2% - 3.99% |  | 4,518 |  |  | 4,425 |  |  | 11,982 |  |  | 5,719 |  |  | 26,644 |  |  | 13.45 | %
4% and over |  | 228 |  |  | 53 |  |  | — |  |  | 3 |  |  | 284 |  |  | 0.14 | %
Total |  | $ | 110,930 |  |  | $ | 44,378 |  |  | $ | 17,851 |  |  | $ | 24,930 |  |  | $ | 198,089 |  |  | 99.99 | %

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

X
- Definition CD maturity [Table Text Block] + References No definition available. + Details
Name: | carv_CdMaturityTableTextBlock
Namespace Prefix: | carv_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration