Consolidated Statements of Comprehensive Loss Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income/(loss) attributed to Carver Bancorp, Inc.	$ 342	$ (136)	$ 753	$ (499)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain/loss of securities available-for sale	(932)	390	(4,904)	302
Change in pension obligations	0	0	0	(302)
Reclassification Adjustment for sales of available-for-sale securities, net of tax	590	0	1,015	0
Total other comprehensive (loss)/income, net of tax	(1,522)	390	(5,919)	0
Total comprehensive (loss)/income, net of tax attributable to Carver Bancorp, Inc.	$ (1,180)	$ 254	$ (5,166)	$ (499)