Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income as reported	$ 408	$ 445	[1]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	246	266
Net Income available to common shareholders of Carver Bancorp, Inc.	$ 162	$ 179
Weighted Average Number of Shares Outstanding, Basic and Diluted	3,696,420	3,696,420
Weighted Average Number Diluted Shares Outstanding Adjustment	4,000	4,000
Weighted Average Number of Shares Outstanding, Diluted	3,700,420	3,700,420
Basic	$ 0.04	$ 0.05
Diluted	$ 0.04	$ 0.05

[1] (1) June 30, 2015 amounts have been restated from previously reported results to correct for a material and certain other errors from prior periods. Refer to Note 1 for further detail.