Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Accumulated deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Equity at Mar. 31, 2014	$ 51,169	$ 45,118	$ 61	$ 56,114	$ (417)	$ (369)	$ (44,570)	$ (4,768)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Carver Bancorp, Inc.	173	0	0	0	0	0	173	0
Other comprehensive loss, net of taxes	1,558	0	0	0	0	0	0	1,558
Net income attributable to noncontrolling interest	17	0	0	0	0	17	0	0
Stock based compensation expense	1	0	0	1	0	0	0	0
Equity at Jun. 30, 2014	$ 52,918	$ 45,118	$ 61	$ 56,115	$ (417)	$ (352)	$ (44,397)	$ (3,210)