| Component: (Network and Table) | |
|---|---|
| Network | 2305301 - Disclosure - Office Properties and Equipment, Net Office Properties and Equipment, Net (Tables) (http://www.carverbank.com/role/OfficePropertiesAndEquipmentNetOfficePropertiesAndEquipmentNetTables) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001016178 (http://www.sec.gov/CIK) |
| Property, Plant and Equipment [Abstract] | Period [Axis] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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2015-04-01 - 2016-03-31 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property, Plant and Equipment [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property, Plant and Equipment [Table Text Block] | The details of office properties and equipment as of March 31 are as follows:
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