Consolidated Statements of Comprehensive Loss Statement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income attributable to Carver Bancorp, Inc.	$ 437	$ 111	$ 451	$ 491
Other Comprehensive (Loss) Income, Net of Tax [Abstract]
Change in unrealized loss of securities available-for sale	(592)	1,103	(364)	2,817
Reclassification adjustment for sales of available-for-sale securities, net of tax	0	3	1	8
Other Comprehensive Income (Loss), Net of Tax	(592)	1,100	(365)	2,809
Total comprehensive income (loss), net of tax attributable to Carver Bancorp, Inc.	$ (155)	$ 1,211	$ 86	$ 3,300