Consolidated Statement of Changes in Stockholders' Equity - 3 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Equity at Mar. 31, 2015	$ 54,979	$ 45,118	$ 61	$ 55,468	$ (417)	$ (44,206)	$ (1,045)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Carver Bancorp, Inc.	178	0	0	0	0	178	0
Other comprehensive loss, net of taxes	(868)	0	0	0	0	0	(868)
Stock based compensation expense	(1)	0	0	0	0	(1)	0
Equity at Jun. 30, 2015	$ 54,288	$ 45,118	$ 61	$ 55,468	$ (417)	$ (44,029)	$ (1,913)