Dividends	9 Months Ended
Mar. 31, 2013
Dividends [Abstract]
Dividends	(8) Dividends On January 16, 2013, the Board of Directors declared a quarterly cash dividend of $0.175 per share of Greene County Bancorp, Inc.’s common stock. The dividend, which reflected an annual cash dividend rate of $0.70 cents per share, was unchanged from the dividend declared during the previous quarter. The dividend was payable to stockholders of record as of February 15, 2013, and was paid on April 1, 2013. Historically, Greene County Bancorp, MHC has waived its right to receive dividends declared on its shares of the Company’s common stock, and Greene County Bancorp, MHC had waived the receipt of dividends for the quarter ended March 31, 2013, subject to the non-objection of the Federal Reserve Board. The Federal Reserve Board has adopted interim final regulations that impose significant conditions and restrictions on the ability of mutual holding companies to waive the receipt of dividends from their subsidiaries. The MHC obtained approval of its members at the special meeting of members held on February 19, 2013 to waive the dividend, and received the non-objection of the Federal Reserve Board for such dividend waiver. Accordingly, such dividend was waived to Greene County Bancorp, MHC on April 1, 2013. Greene County Bancorp, MHC has the ability to waive dividends declared through February 19, 2014 without obtaining another vote of its members. Greene County Bancorp, MHC’s ability to waive divdends beyond this date cannot be reasonably determined at this time.

Dividends

9 Months Ended

Mar. 31, 2013

(8) Dividends

On January 16, 2013, the Board of Directors declared a quarterly cash dividend of $0.175 per share of Greene County Bancorp, Inc.’s common stock. The dividend, which reflected an annual cash dividend rate of $0.70 cents per share, was unchanged from the dividend declared during the previous quarter. The dividend was payable to stockholders of record as of February 15, 2013, and was paid on April 1, 2013. Historically, Greene County Bancorp, MHC has waived its right to receive dividends declared on its shares of the Company’s common stock, and Greene County Bancorp, MHC had waived the receipt of dividends for the quarter ended March 31, 2013, subject to the non-objection of the Federal Reserve Board. The Federal Reserve Board has adopted interim final regulations that impose significant conditions and restrictions on the ability of mutual holding companies to waive the receipt of dividends from their subsidiaries. The MHC obtained approval of its members at the special meeting of members held on February 19, 2013 to waive the dividend, and received the non-objection of the Federal Reserve Board for such dividend waiver. Accordingly, such dividend was waived to Greene County Bancorp, MHC on April 1, 2013. Greene County Bancorp, MHC has the ability to waive dividends declared through February 19, 2014 without obtaining another vote of its members. Greene County Bancorp, MHC’s ability to waive divdends beyond this date cannot be reasonably determined at this time.