Carver Bancorp Inc.-Parent Company Only Carver Bancorp Inc.-Parent Company Only (Notes)	12 Months Ended
Mar. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information of Carver Bancorp, Inc.-Parent Company Only	CARVER BANCORP, INC. - PARENT COMPANY ONLY

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

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