Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income available to common shareholders of Carver Bancorp, Inc.	$ 178	$ 173
Weighted Average Number of Shares Outstanding, Basic and Diluted	3,696,420	3,696,225
Basic	$ 0.05	$ 0.05
Diluted	$ 0.05	$ 0.05