Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	6 Months Ended
Sep. 30, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of consolidated financial statement presentation The consolidated financial statements include the accounts of the Company, the Bank and the Bank’s wholly owned or majority-owned subsidiaries, Carver Asset Corporation, CFSB Realty Corp., CCDC, and CFSB Credit Corp. All significant intercompany accounts and transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six month period ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ended March 31, 2016. The consolidated balance sheet at September 30, 2015 has been derived from the unaudited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statement of financial condition and revenues and expenses for the period then ended. These unaudited consolidated financial statements should be read in conjunction with the Annual Report on Form 10-K for the year ended March 31, 2015. Amounts subject to significant estimates and assumptions are items such as the allowance for loan losses, valuation of real estate owned, realization of deferred tax assets, and the fair value of financial instruments. While management uses available information to recognize losses on loans, future additions to the allowance for loan losses or future writedowns of real estate owned may be necessary based on changes in economic conditions in the areas where Carver Federal has extended mortgages and other credit instruments. Actual results could differ significantly from those assumptions. Current market conditions increase the risk and complexity of the judgments in these estimates. In addition, the OCC, Carver Federal's regulator, as an integral part of its examination process, periodically reviews Carver Federal's allowance for loan losses and, if applicable, real estate owned valuations. The OCC may require Carver Federal to recognize additions to the allowance for loan losses or additional writedowns of real estate owned based on their judgments about information available to them at the time of their examination.

Basis of consolidated financial statement presentation

The consolidated financial statements include the accounts of the Company, the Bank and the Bank’s wholly owned or majority-owned subsidiaries, Carver Asset Corporation, CFSB Realty Corp., CCDC, and CFSB Credit Corp. All significant intercompany accounts and transactions have been eliminated in consolidation.

The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six month period ended September 30, 2015 are not necessarily indicative of the results that may be expected for the year ended March 31, 2016. The consolidated balance sheet at September 30, 2015 has been derived from the unaudited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statement of financial condition and revenues and expenses for the period then ended. These unaudited consolidated financial statements should be read in conjunction with the Annual Report on Form 10-K for the year ended March 31, 2015. Amounts subject to significant estimates and assumptions are items such as the allowance for loan losses, valuation of real estate owned, realization of deferred tax assets, and the fair value of financial instruments. While management uses available information to recognize losses on loans, future additions to the allowance for loan losses or future writedowns of real estate owned may be necessary based on changes in economic conditions in the areas where Carver Federal has extended mortgages and other credit instruments. Actual results could differ significantly from those assumptions. Current market conditions increase the risk and complexity of the judgments in these estimates.

In addition, the OCC, Carver Federal's regulator, as an integral part of its examination process, periodically reviews Carver Federal's allowance for loan losses and, if applicable, real estate owned valuations. The OCC may require Carver Federal to recognize additions to the allowance for loan losses or additional writedowns of real estate owned based on their judgments about information available to them at the time of their examination.