Consolidated Statements of Comprehensive Income (Loss) Statement - Scenario, Unspecified [Domain] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net (loss) / income attributable to Carver Bancorp, Inc.	$ 364	$ (836)
Other comprehensive (loss) income, net of tax [Abstract]
Change in unrealized gain (loss) of securities available-for-sale, net	3,731	(5,282)
Change in pension obligations	0	71
Reclassification adjustments for sales of available-for-sale securities, net of tax	8	552
Reclassification adjustment for termination of pension plan, net of tax	0	(1,148)
Other Comprehensive Income (Loss), Net of Tax	3,723	(4,615)
Comprehensive Income (Loss), Net of Tax, Attributable to Carver Bancorp, Inc.	$ 4,087	$ (5,451)