Consolidated Statements of Comprehensive Loss Statement - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income attributable to Carver Bancorp, Inc.	$ (165)	$ 210	$ 12	$ 381
Other Comprehensive (Loss) Income, Net of Tax [Abstract]
Change in unrealized loss of securities available-for sale	1,096	150	228	1,713
Reclassification adjustment for sales of available-for-sale securities, net of tax	1	0	1	4
Other Comprehensive Income (Loss), Net of Tax	1,095	150	227	1,709
Total comprehensive income (loss), net of tax attributable to Carver Bancorp, Inc.	$ 930	$ 360	$ 239	$ 2,090